| 2 | Hd1,Ghd7,and DTH8 synergistically determine the rice heading date and yield-related agronomic traits显示文摘Heading date determines the seasonal and regional adaptation of rice(Oryza sativa L.)varieties and is mainly controlled by photoperiod sensitivity(PS).The core heading date genes Hd1,Ghd7,DTH8,and PRR37 act synergistically in regulating the PS.In this study,we systematically analyze the heading date,PS,and agronomic traits of eight homozygous lines with various combinations of Hd1,Ghd7,and DTH8 alleles in the prr37 background under long-day(LD)and short-day(SD)conditions,respectively.We find that Hd1 alone promotes heading,regardless of the day length.However,under LDs,Hd1 suppresses flowering,in coordination with functional Ghd7 or with Ghd7 and DTH8.These loci cooperate to negatively regulate the Ehd1-Hd3 a/RFT1 pathway and delay heading.Under SDs,Hd1 competes with various heading suppressors to promote heading.Therefore,the dual function of Hd1 is vital for PS.The lines carrying Hd1 alone show reduced plant height with fewer primary and secondary branches in panicles.Lines carrying Ghd7 and DTH8(with hd1)show delayed heading and improve agronomic traits.Overall,our results reveal the regulation of rice PS flowering by the core heading date genes and their effects on agronomic traits,providing valuable information for the selection of rice varieties for adaptation to different light and temperature conditions. | Kangli Sun Minghui Huang Wubei Zong Dongdong Xiao Chen Lei Yanqiu Luo Yingang Song Shengting Li Yu Hao Wanni Luo Bingqun Xu Xiaotong Guo Guangliang Wei Letian Chen Yao-Guang Liu Jingxin Guo | 2022 | Journal of Genetics and Genomics2022，49，5： | 4 |
| 4 | Uptake and Subcellular Distribution of Cd in Tobacco显示文摘In this study,tobacco cultivar Nanjiang No.3 was selected as the experimental material to uptake,accumulation and subcellular distribution of Cd in tobacco.The results showed that Cd uptake in tobacco leaves increased first then declined and increased again;the content generally in descending order of of Cd in various subcellular fractions of tobacco leaves demonstrated a descending order of cytosols>cell walls>mitochondria>chloroplasts;the contents of Cd in various subcellular fractions of tobacco roots were in an descending order of cell walls>cytosols>mitochondria>chloroplasts;under high Cd concentrations,tobacco plants were seriously harmed by Cd.This study provided theoretical basis for the improvement of tobacco production. | Xiaohui SONG Yingang LU Dan HE Wu RAN | 2015 | Agricultural Biotechnology2015，4，2： | 0 |
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