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| 1 | Exogenous ethylene influences flower opening of cut roses (Rosa hybrida) by regulating the genes encoding ethylene biosynthesis enzymes显示文摘The purpose of this paper is to investigate the differential responses of flower opening to ethylene in two cut rose cultivars, ‘Samantha’, whose opening process is promoted, and ‘Kardinal’, whose opening process is inhibited by ethylene. Ethylene production and 1- aminocyclopropane-1-carboxylate (ACC) synthase and oxidase activities were determined first. After ethylene treatment, ethylene production, ACC synthase (ACS) and ACC oxidase (ACO) activities in petals increased and peaked at the earlier stage (stage 3) in ‘Samantha’, and they were much more dramatically enhanced and peaked at the later stage (stage 4) in ‘Kardinal’ than control during vasing. cDNA fragments of three Rh-ACSs and one Rh- ACO genes were cloned and designated as Rh-ACS1, Rh-ACS2, Rh-ACS3 and Rh-ACO1 respectively. Northern blotting analysis revealed that, among three genes of ACS, ethylene-in- duced expression patterns of Rh-ACS3 gene corresponded to ACS activity and ethylene production in both cultivars. A more dramatic accumulation of Rh-ACS3 mRNA was induced by ethylene in ‘Kardinal’ than that of ‘Samantha’. As an ethylene action inhibitor, STS at concentration of 0.2 mmol/L generally inhib-ited the expression of Rh-ACSs and Rh-ACO in both cultivars, although it induced the expression of Rh-ACS3 transiently in ‘Kardinal’. Our results suggests that ‘Kardinal’ is more sensitive to ethylene than ‘Samantha’; and the changes of Rh-ACS3 expression caused by ethylene might be related to the acceleration of flower opening in ‘Samantha’ and the inhibition in ‘Kardinal’. Additional results indicated that three Rh-ACSs genes were differentially associated with flower opening and senescence as well as wounding. | MA Nan1, CAI Lei1, LU Wangjin2, TAN Hui1 & GAO Junping1 1. Department of Ornamental Horticulture and Landscape Architecture, China Agricultural University, Beijing 100094, China 2. Department of Horticulture, South China Agricultural University, Guangzhou 510642,China | 2005 | Science China(Life Sciences)2005，48，5： | 20 |
| 2 | Effects on Sucrose Metabolism,Dry Matter Distribution and Fruit Quality of Tomato Under Water Deficit显示文摘Four irrigation treatments were designed with 2, 4, 6 and 8 d intervals to irrigate, respectively. Watering was stopped when the reading of the moisture tension sensor reached zero. The results indicated that glucose and fructose content of tomato's fruit were increased but sucrose content was decreased with fruit growth and development. In different stages, carbohydrate content of tomato fruit in the treatment 3 was the highest, in the treatment 2 was higher, and in the other treatments was the lowest. SS(sucrose synthase) activity was decreased but SPS(sucrose phosphate synthase) activity was increased with development of tomato. SS and SPS activity were increased but acid invertase and neutral invertase activity of ripe stage were decreased under deficit irrigation. Glucose and fructose content were increased in leaves of tomato under water deficit.Soluble sugars, organic acid and the ratio of sugar/acid in tomato fruits were increased and dry matter accumulation of plant was enhanced under water deficit. But the growth of fruits upside the plant and its dry matter accumulation were badly affected under water stress. | QI Hong-yan, LI Tian-lai, ZHANG Jie, WANG Lei and CHEN Yuan-hong(Horticultural College, Shenyang Agricultural University, Shenyang 110161 , P.R.China) | 2003 | Agricultural Sciences in China2003，2，11： | 19 |
| 3 | Estimation of Cucumber Evapotranspiration in Solar Greenhouse in Northeast China显示文摘The solar greenhouse without heating system has been widely used for vegetable production in Northeast China since the 1980s. The experiment was conducted in the solar greenhouse to study the relationship between evapotranspiration (ET) of cucumber and climatic factors. Reference evapotranspiration (ET0) and pan evaporation (Ep) were applied to determine cucumber evapotranspiration by regression methods. Results showed that the ET of cucumber increased with the increasing of solar radiation, air temperature and vapor pressure. The solar radiation was the most important factor that influences ET among environmental parameters. The determination coefficient (R2) was 0.865 between ET and Ep, higher than that between ET and ET0 (application of a constant vegetation coefficient, R2 = 0.46). The pan coefficient (kp, determined from the ratio of ET to Ep) and the crop coefficients (kc, determined from the ratio of ET to ET0) showed considerable variability and no obvious systematic pattern could be described throughout the study period. Ep was linearly related to ET and 20 cm pan can be well used to determine the water requirement of cucumber under subsurface drip irrigation in this type of solar greenhouse. | ZHANG Zi-kun, LIU Shi-qi, LIU Su-hui and HUANG Zhi-jun State Key Laboratory of Crop Biology/Key Laboratory of Horticultural Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, P.R.China | 2010 | Agricultural Sciences in China2010，9，4： | 14 |
| 4 | Ectopic expression of a hyacinth AGL6 homolog caused earlier flowering and homeotic conversion in Arabidopsis显示文摘MADS-box genes are involved in floral organ development. Here we report that an AGL6(Agamous-like 6)-like MADS-box gene, HoAGL6, was isolated from Hyacinthus orientalis L. Expression pattern analy-sis demonstrated that HoAGL6 transcript was detected in inflorescence buds, tepals, carpels and ovules, but not in stamina, leaves or scales. Transgenic Arabidopsis plants ectopically expressing HoAGL6 exhibited novel phenotypes of significantly reduced plant size, extremely early flowering, and losing inflorescence indeterminacy. In addition, wide homeotic conversion of sepals, petals, and leaves into carpel-like or ovary structures, and disappearance or number reduction of stamens in 35S::HoAGL6 Arabidopsis plants were also observed. RT-PCR analysis indicated that the expressions of flowering time gene SOC1 and flower meristem identity gene LFY were significantly up-regulated in 35S::HoAGL6 transgenic Arabidopsis plants, and the expression levels of floral organ identity genes AG and SEP1 in leaves were also elevated. These results indicated that HoAGL6 was involved in the regulation of flower transition and flower organ formation. | FAN JinHui1, LI WenQing2, DONG XiuChun1, GUO Wei1 & SHU HuaiRui3 1 College of Forestry, Shandong Agricultural University, Taian 271018, China 2 College of Biological Science, China Agricultural University, Beijing 100094, China 3 College of Horticulture Science and Engineering, Shandong Agricultural University, Taian 271018, China | 2007 | Science China(Life Sciences)2007，50，5： | 12 |
| 5 | An electron microscopic-cytochemical localization of plasma membrane Ca^(2+)-ATPase activity in poplar apical bud cells during the induction of dormancy by short-day photoperiods显示文摘Plasma membrane (PM) Ca2+-ATPase activity in poplar apical bud meristematic cells during short-day (SD)-induced dormancy development was examined by a cerium precipitation EM-cytochemical method. Ca2+-ATPase activity, indicated by the status of cerium phosphate precipitated grains, was localized mainly on the interior face (cytoplasmic side) of the PM when plants were grown under long days and reached a deep dormancy. A few reaction products were also observed on the nuclear envelope.When plant buds were developing dormancy after 28 to 42 d of SD exposure, almost no reaction products were present on the interior face of the PM. In contrast, a large number of cerium phosphate precipitated grains were distributed on the exterior face of the PM. After 70 d of SD exposure, when buds had developed a deep dormancy, the reaction products of Ca2+-ATPase activity again appeared on the interior face of the PM. The results seemed suggesting that two kinds of Ca2+-ATPases may be present on the PM during the SD-induced dormancy in poplar.One is the Ca2+-punlping ATPase, which is located on the interior face of the PM, for maintaining and restoring the Ca2+homeostasis. The other might be an ecto-Ca2+-ATPase, which is located on the exterior face of the PM, for the exocytosis of cell wall materials as suggested by the fact of the cell wall thickening during the dormancy developlnent in poplar. | JIAN LING CHENG JI HONG LI PAUL H LI TONY HH CHEN(Tel: 1612 624 1757 Fax: +1612 624 4941 E-mail: lixxx008@tc.umn.edu)(1Laboratory of Plant Hardiness, Department of Horticultural Science and Plant Biological Sciences Program, University of Minnesota, | 2000 | Cell Research2000，10，2： | 9 |
| 6 | Effects of Cinnamon Acid on Respiratory Rate and Its Related Enzymes Activity in Roots of Seedlings of Malus hupehensis Rehd.显示文摘This paper studied the effects of cinnamon acid treatments on the respiratory rate and related enzymes activity in the seedling roots of Malus hupehensis Rehd.It would provide information for understanding the mechanisms of inhibition damage caused by continuous cultivation of apple tree.20 mL of solution containing different concentrations of cinnamon acid was added into container with the tested seedlings.After treatment,the samples were taken periodically and the respiratory rates were measured by OXY-LAB oxygen electrodes under 25°C stable temperature and then the activities of related enzymes were measured.The rates of total respiration and other 2 pathways [tricarboxylic acid cycle (TCA) and pentose phosphate pathway (PPP)] appeared initially an increasing treads and late (on the 3rd d) began to decline.However,they again appeared an increase trend at the end period,on the contrast,the respiratory rate of embden-meyer- hot-parnas (EMP) pathway appeared a stead decline tread but it had a recover on the last day.The respiratory rate of total and 3 pathways were decreased under 125 mg kg-1 (soil).The dynamic trends of the enzymes activities of pyrophosphate-dependent phosphofructokinase (PFK),glucose-6-phosphate dehydrogenase (G-6-PDH) and malate dehydrogenase (MDH) showed similarly.In conclusion,treatments of certain concentration of cinnamon acid would inhibit the respiratory rate and related enzymes activity of roots of M.hupehensis Rehd.And the inhibition degrees were positively related with concentration of cinnamon acid treatments. | GAO Xiang-bin,ZHAO Feng-xia,SHEN Xiang,HU Yan-li,HAO Yun-hong,YANG Shu-quan,SU Li-tao and MAO Zhi-quan State Key Laboratory of Crop Biology/College of Horticultural Science and Engineering,Shandong Agricultural University,Tai’an 271018,P.R.China | 2010 | Agricultural Sciences in China2010，9，6： | 9 |
| 7 | Respiratory Response of Dormant Nectarine Floral Buds on Chilling Deficiency显示文摘Changes in main biochemical respiratory pathways in dormant nectarine floral buds were studied with nectarine trees(Prunus persica var.nectariana cv.Shuguang)in order to determine the function of respiration in dormancy release.Oxygen-electrode system and respiratory inhibitors were used to measure total respiratory rates and rates of respiratory pathways.Results showed that chilling deficiency blocked the transition of respiratory mode,and made buds stay in a state of high level pentose phosphate pathway(PPP)and low level tricarboxylic acid cycle(TCA).The decline of PPP and activation of TCA occurred synchronously with the release of dormancy.In addition,the inhibition of PPP stimulated a respiration increase related with TCA.It could be concluded that the function of PPP activation in dormancy release might be limited and PPP declination inducing TCA activation might be part of respiration mode transition mechanism during bud sprouting. | TAN Yue,GAO Dong-sheng,LI Ling,CHEN Xiu-de and XU Ai-hong State Key Laboratory of Crop Biology,National Research Center for Apple Engineering and Technology/College of Horticulture Science and Engineering,Shandong Agricultural University,Tai’an 271018,P.R.China | 2010 | Agricultural Sciences in China2010，9，10： | 7 |
| 8 | The EST Analysis of A Suppressive Subtraction cDNA Library of Chinese Wild Vitis pseudoreticulata Inoculated with Uncinula necator显示文摘Uncinula necator is a worldwide serious fungus disease causing annual heavy lost on grapevine production. In order to get more informations on defense related EST sequences and help breeding program, we constructed and characterized a suppression subtractive hybridization cDNA library with artificially inoculated leaves and control Chinese wild Vitis pseudoreticulata clone Baihe-35-1, which is highly resistant to powdery mildew. In the library, the length of 58 EST fragments known as putative functions varied from 130 to 800 bp, and 60% of the ESTs exhibited high similarity to known sequences in database of GenBank with BLASTX analysis. These genes were involved in stress/defense response, detoxification, signal transduction, disease defense, and etc., and 14 ESTs remained unknown or hypothetical proteins, which may be new genes. The experiment provided an important basis for studying the disease-resistance mechanism and obtaining the genes for the aim of improving grapevine powdery mildew resistance. | SHI Jiang-li, WANG Yue-jin, ZHU Zi-guo and ZHANG Chao-hong Key Laboratory of Horticultural Plant Germplasm Utilization in Northwest China, Ministry of Agriculture/Shaanxi Key Laboratory of Molecular Biology for Agriculture/College of Horticulture, Northwest A&F University, Yangling 712100, P.R.China | 2010 | Agricultural Sciences in China2010，9，2： | 5 |
| 9 | Stress responsive gene CIPK14 is involved in phytochrome A-mediated far-red light inhibition of greening in Arabidopsis显示文摘In this study, we show that CIPK14,a stress responsive CBL-interacting protein kinase gene,is involved in phytochrome A-mediated far-red light inhibition of greening in Arabidopsis seedlings. The CIPK14-impairment mutant cipk14 grown in continuous far-red (FR) light did not show greening when exposed to white light illumination for 15 h. By contrast, the FR-grown phytochrome A null mutant phyA greened within 0.5 h of exposure to white light. Although greening of Col-4 (wild-type) was not completely abolished by FR, it exhibited a significantly decreased greening capacity compared with that of phyA. Further analyses demonstrated that the expression of protochlorophyllide reductase (POR) genes was correlated with the greening ability of the genotypes. In addition, CIPK14 appeared to be regulated by both the circadian clock and PhyA. Taken together, these results suggest that CIPK14 plays a role in PhyA-mediated FR inhibition of seedling greening, and that a Ca-related kinase may be involved in a previously undefined branch point in the phytochrome A signaling pathway. | QIN YuZhi2,3, GUO Ming1, LI Xu1, XIONG XingYao2,3, HE ChangZheng2,3, NIE XianZhou4 & LIU XuanMing1 1College of Life Science and Biotechnology, Hunan University, Changsha 410082, China 2College of Horticulture and Landscape, Hunan Agricultural University, Changsha 410128, China 3Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization, Hunan Agricultural University, Changsha 410128, China 4Potato Research Centre, Agriculture and Agri-Food Canada, Fredericton, New Brunswick E3B 4Z7, Canada | 2010 | Science China(Life Sciences)2010，53，11： | 5 |
| 10 | Effect of Partial Replacement of Nitrate by Amino Acid and Urea on Nitrate Content of Non-heading Chinese Cabbage and Lettuce in Hydroponic Condition显示文摘In this paper, the authors studied the effect of different mixtures of glyeine (Gly), isoleucine (Iso), proline (Pro), and urea solutions used as a partial (20%) replacment of nitrate in the nitrate content and quality of non-heading Chinese cabbage and lettuce in hydroponice. Five treatments were done 12 d before harvest. Compared to the control group, Gly had the best effect in reducing the nitrate content of both vegetable leaves and petioles; the mixture of Giy, Iso and Pro ranked second and urea the least. Treatments with amino acid could also increase soluble sugar and protein contents and enhance total-N in leaves significantly.In contrast, amino acid enhanced NRA in non-heading Chinese cabbage, while they decreased it slightly in lettuce. The results showed that amino acids and urea could reduce the nitrate content of both vegetables, but they had almost the same effect on non-heading Chinese cabbage. Moreover, amino acids were more effective than urea in lettuce. As a result, it was concluded that partial replacement of nitrate with amino acids not only reduced the nitrate content but also improved the quality of vegetables. | CHEN Gui-lin, GAO Xiu-rui and ZHANG Xian-bin( College of Horticulture , Agricultural University of Hebei, Baoding 071001 , P. R . China ) | 2002 | Agricultural Sciences in China2002，1，4： | 5 |
| 11 | Difference of a citrus late-ripening mutant (Citrus sinensis) from its parental line in sugar and acid metabolism at the fruit ripening stage显示文摘‘Fengjiewancheng’(FW) (Citrus sinensis), a bud sport of‘Fengjie 72-1’navel orange (FJ), ripens one month later than its parental line. Differences in sugar and acid content and the transcript level of su-crose- and citric-metabolic enzymes for the two cultivars were investigated during fruit ripening. Re-sults showed that both sugar and acid metabolisms of the mutant were affected by the mutation. In the pulp of FW, sugar content was significantly lower than that in FJ before 227 DAF (days after flowering) and higher at 263 DAF; the mutant’s gene expression of one isoform of citrus sucrose synthase (CitSS1) was delayed, and its gene expression of citrus acid invertase (CitAI) was stronger than that in its pa-rental cultivars at 207 and 263 DAF. In the peel, only the sucrose content in FW was significantly lower than those in FJ at the early periods of fruit ripening (165 and 187 DAF); however the transcripts of the sucrose-cleaving enzymes in the mutant were higher than those in FJ at different ripening points. As regards acid accumulation in the two cultivars, it was observed that in the pulp of the mutant, the malic acid content was significantly lower than that in its parental cultivars from 187 to 263 DAF, and in the peel, remarkably higher during the whole fruit ripening period. The citric acid content in both the pulp and the peel of FW was higher than that in those of FJ during the early ripening period and lower during the late ripening period, which were correspondingly associated in part with the higher transcript level of citrus mitochondrial citrate synthase (CitCS) and with lower or undetectable transcript level of citrus cytosolic aconitase (CitAC). Hence, it could be concluded that the mutation in FW affected sugar and acid metabolism, which might be related with other late-ripening phenotypes. | LIU YongZhong, LIU Qing, XIONG JingJing & DENG XiuXin National Key Laboratory of Crop Genetic Improvement College of Horticulture and Forestry Science, Huazhong Agricultural Uni-versity, Wuhan 430070, China | 2007 | Science China(Life Sciences)2007，50，4： | 5 |
| 12 | Effect of Nitrogen on Apple Fruit Development in Different Loads显示文摘The experiments including soil application N, thinning and priming leaf treatment, using eight -year-old apple trees (M. domestica Borkh. cv. Red Fuji/M. hupenensis Rhed) as materials were carried out to study the effect of N on fruit development. The main results were as follows: on heavily thinned trees, SS activity was independent of N and priming leaves treatments. The results show that the carbohydrate restriction of source to sink activity did not exist, and N application did not stimulate fruit growth rates relative to those on nonfertilized trees; however, N fertilization resulted in a longer fruit development period and increased the growth potential of individual fruit by 20.8% (fresh weight) and 14.1% (dry weight) vs. controls; in unthinned trees, SS activity was increased by N fertilization but decreased by priming leaves treatment, so the carbohydrate restriction of source to sink activity existed, N fertilization increased the average single fruit weight both by extending the fruit development period and by increasing fruit growth rate, and the increasing rates were 28.2% (fresh weight) and 19.4 % (dry weight) compared to the unthinned nonfertilized controls. Fruit soluble sugar and pericarp anthocyanin concentration was decreased by N fertilization. | PENG Fu-tian, JIANG Yuan-mao, GU Man-ru and SHU Huai-rui( Department of Horticulture, Shandong Agricultural University, Taian 271018 , P.R. China) | 2002 | Agricultural Sciences in China2002，1，6： | 5 |
| 13 | Female Plant Types of Ginkgo biloba L. in China显示文摘Ginkgo biloba is a dioecious and unique species within Ginkgo family and Ginkgo genus, but it shows a big variability. From 1950s, resources of female plants in China were investigated and collected, and the seed anatomical structure and morphological characters at different development stages were observed. According to the shape, length, width and thickness of ovule bracket and seed stone, as well as the characteristics of both sides and top of the stone, the female plants of Ginkgo biloba have been divided into five types, long-stone, Buddha-finger, horse-bell, mume-stone and round-stone. In addition, the important cultivars belonging to different types were also determined. The stone weight, index of stone shape, and contents of dry matter, amylose, amylopectin, starch, rough protein, soluble sugar and hydrocyanic acid in seed kernel of each type were measured, and the qualities of seed stone were appraised, which lays a foundation for the improvement and utilization of female plant resources in Ginkgo biloba. | Chen Peng He Fengren Tao Jun Qian Bolin Wei Jun Ling Yuping Wang Li Department of Horticulture, Agricultural College Yangzhou University, Yangzhou 225009, P.R.China | 2003 | Forestry Studies in China2003，5，2： | 4 |
| 14 | Effects of 1-MCP on Ethylene Synthesis and Metabolismof Apple During Storage显示文摘Red Fuji apple (Malus domestica Borkh var. Red Fuji) fruits were used to study the effect of 1-MCP on ethylene biosynthesis metabolism during storage. The results showed that 1-MCP maintained the firmness and inhibited the respiration rate, LOX activity and ethylene production rate of fruits. Further study indicated that 1-MCP inhibited ACS (ACC synthase) activity from the 15th day, increased ACC accumulation,and delayed the appearance of ACO (ACC oxidase) activity peak. The increase of protein kinase activity was also inhibited by 1-MCP during fruit ethylene climacteric time. | LI Fu-jun, ZHAI Heng, YANG Hong-qiang, ZHANG Xin-hua, SHU Huai-rui and ZHOU Jie(Horticultural College , Shandong Agricultural University, Tai’an 271018 , P.R. China) | 2003 | Agricultural Sciences in China2003，2，11： | 4 |
| 15 | Genetic Relationships among Prunus mume var. pendula Using AFLP Markers显示文摘Genetic relationships among Prunus mume var. pendula were studied by using AFLP markers. 18 accessions representing 14 cultivars of Prunus mume var. pendula were selected from the germplasm collection at the Research Center of China Mei Flower. Seven Mse I-EcoR I AFLP primer combinations revealed 450 legible bands, and 269 of which were polymorphic markers. A similarity matrix was prepared using the simple matching coefficient of similarity and Neis (72) distance coefficient. A UPGMA dendrogram demonstrated the genetic relationships of the cultivars. The information given by AFLP markers was basically consistent with the morphological classification and the evolutionary history of the morphotypes, and roughly supported the new revised classification system for Chinese Mei Cultivars. But there were still several exceptions: 1) the Guhong Chuizhi inserted between the Tiaoxue Chuizhi and the Danfen Chuizhi; 2) the Wufu Chuizhi kept off the Pink Pendant Form, and the Moshan Chuizhi was removed from Viridiflora Pendant Form; 3) the Danbi Chuizhi and the Shuangbi Chuizhi of Viridiflora Pendant Form got together well but fell within the Pink Pendant Form. | Ming Jun1* Zhang Qixiang2 Ru Guangxin3 Mao Qingshan4 Yan Xiaolan4 Lan Yanping5 1Department of Horticulture, Hubei Agricultural College, Jingzhou 434025, P. R. China 2College of Landscape Architecture, Beijing Forestry University, Beijing 100083, P. R. China 3Department of Forestry, Henan Agricultural University, Zhengzhou 450000, P. R. China 4The Research Center of China Mei Flowers, Wuhan 430000, P. R. China 5Institute of Plant Nutrition and Resource, Beijing Academy of Agriculture and Forestry, Beijing 100091, P. R. China | 2003 | Forestry Studies in China2003，5，4： | 3 |
| 16 | Regulation of Propylene and 1-Methylcyclopropene on Expressions of ACS and ACO Genes in Persimmon Fruits显示文摘The regulation of postharvest treatment with propylene and 1-MCP on ethylene release rate and expressions of 1-aminocyclopropane-1-carboxylic acid synthase (ACS) and 1-aminocyclopropane-1-carboxylic acid oxidase (ACO) genes in Fuping Janshi persimmon (Diospyros kaki L.) fruit were investigated. Fruits were treated with propylene and 1-MCP, then stored at 20°C, ethylene release rate of the treated fruits was measured at regular intervals and RNA was extracted for Northern blotting analysis. The results suggested that treatment with propylene accelerated the expressions of ACS and ACO genes and then enhanced the ethylene biosynthesis, while treatment with 1-MCP inhibited the expressions of two genes and their ethylene biosynthesis. Furthermore, different effects on expressions caused by treatments with propylene and 1-MCP existed in various fruit tissues, the inhibitory effect on ACS and ACO genes by 1-MCP was the strongest in pericarp, followed by pulp and core tissues, in the area near fruit stalk, the inhibitory effect was the weakest. While the enhanced effect on ACS and ACO genes by propylene increased from pulp, core, and pericarp to the area near fruit stalk. Expression of each member of ACS and ACO families in various tissues was also completely different, in control and propylene treatment, DKACS3 gene just expressed in the area near fruit stalk and did not express in other tissues, but DKACS2 gene expressed in four tissues by treatment with propylene. | LIU Le, RAO Jing-ping, CHANG Xiao-xiao and YI Shun-chao College of Horticulture, Northwest Agricultural and Forest University/Key Laboratory of Northwest Horticultural Plants Germplasm and Genetic Improvement, Ministry of Agriculture, Yangling 712100, P.R.China | 2009 | Agricultural Sciences in China2009，8，10： | 3 |
| 17 | Effects of Phenolic Acids on Growth and Activities of Membrane Protective Enzymes of Cucumber Seedlings显示文摘Two phenolic acids P-hydroxy benzoic acid and cinnamic acid were designated as four concentrations (0, 50μmol/L, 100μmol/L, 150μmol/L) to investigate the effects of phenoic acids on the growth and the activities of membrane protective enzymes of cucumber seedlings. The results showed that both phenolic acids inhibited the seedlings growth. The inhibitory effects were increased with the concentration of phenolic acids increasing and the time of treatment prolonging. Seedlings treated with A150 (P-hydroxy benzoic acid, 150μmol/L), B50 (cinnamic acid, 50 μmol/L), B100 (cinnamic acid,100μmol/L), B150 (cinnamic acid, 150μmol/L) showed significantly shorter in plant height , smaller in leaf area. and lighter in fresh weight. The inhibitory effect of cinnamic acid was comparatively stronger than that of P-hydroxy benzoic acid. For protective enzymes system, compared to control, the POD activity increased at all concentrations of P-hydroxy benzoic acid during the treatment but increased at first then decreased before increased again at last at all concentrations of cinnamic acid . In the case of CAT, its activity increased at first, then decreased, and increased again at lower concentrations of phenolic acids. However, at higher concentrations the activities decreased at first, then increased a little, decreased continuously at last. In addition, the treatments of phenolic acids led to an increase then a decreaseof SOD activity and an increase of MDA content in the seedlings. All above indicated the accumulating of free radicalsand destruction of protective enzymes at higher concentrations of phenolic acids. | WU Feng-zhi , HUANG Cai-hong and ZHAO Feng-yan(College of Horticulture, Northeast Agricultural University, Harbin 150030, P.R.China) | 2002 | Agricultural Sciences in China2002，1，8： | 3 |
| 18 | Brassinosteroid signal trans-duction: An emerging picture显示文摘Steroid hormones play essential roles in animal growth and development. Steroid signaling in animal system is focused on the direct gene regulation response mediated by its nuclear receptors. Recently, steroid hormones are also found in plants. Identification of BRI1 — a critical compo-nent of the plasma-membrane steroid receptor complex, and the related signal transduction pathway mediated by the membrane receptor have revealed an elementary picture of BR signaling from the cell surface perception to the activa-tion of BR-responsive nuclear genes. | WANG Qiaomei1 & MA Ligeng2 1. Department of Horticultural Science, Zhejiang University, Hangzhou 310029, China 2. Department of Biology, Hebei Normal University, Shijiazhuang 050016, China Correspondence should be addressed to Ma Ligeng (e-mail: ligeng.ma @yale.edu) | 2003 | Chinese Science Bulletin2003，48，18： | 3 |
| 19 | Effects of Low Temperature Stress and INA Bacteriaon Chlorophyll a Fluorescence Induction Kineticsin Young Fruit of Two Apricot Cultivars显示文摘Effects of low temperature and INA bacteria on the change of chlorophyll a fluorescence inyoung fruit from two apricot cultivars were investigated. Low temperature decreased the potential activity(Fv/Fo) ,conversion efficiency of primary light energy (Fv/Fm)of PS Ⅱ and photochemical quenching (qP) inyoung fruit of two apricot cultivars. Low temperature enhanced non-photochemical quenching qN, decreasingthe quantum yield of photosynthetic electron transfer. The presence of ice nucleating active (INA) bacteria in-tensified the effects of low temperature, raised the injury temperature threshold from - 4℃ to - 2 - - 3℃.INA bacteria can be a factor to induce frost susceptibility of apricot fruit. The amount of damaged PS Ⅱ activi-ty center was related to apricot fruit size and cultivar. | YANG Jian-min , MENG Qing-rui, PENG Wei-xiu, WANG Xue-dong , ZHANG Yuan-hui , SUN Fu-zai, ZHAO Ting-chang and LI Shao-hua(College of Forestry , Hebei Agricultural University, Baoding 071000 , P. R. China Institute of Plant Protection ,Chinese Aeademy of Argricultural Sciences , Beijing 100094 , P. R. China College of Horticultural Sciences ,China Agricultural University , Beijing 100094 , P. R. China) | 2002 | Agricultural Sciences in China2002，1，12： | 3 |
| 20 | Effect of Weak Light on the Photoassimilates Distribution and Transformation of Young Grape Plants显示文摘The effect of weak light on the photoassimilates distribution and transformation of young Jingyu grape plants ( Vitis vinefera L. cv. Jingyn) were studied by shading. Compared to the grape grown under natural light intensity environment, the net photosynthetic rate diurnal variation curve of experimental plants grown in weak light intensity environment was remarkably lower. Its leaf and stem biomass ratio increased when light intensity decreased, the root and new shoot biomass ratio showed an opposite trend. The 14C-photoassimilates was mostly distributed to young leaves and stem, a little was distributed to root. The metabolism of 14C-photoassimilates distributed to the entire grape body were also changed under weak light intensity environment. | ZHAN Ji-cheng, HUANG Wei-dong and WANG Li-jun(College of Horticultural Sciences , China Agricultural University, Beijing 100094 , P. R . China) | 2002 | Agricultural Sciences in China2002，1，9： | 3 |
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