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| 1 | Short Panicle 3 controls panicle architecture by upregulating APO2/RFL and increasing cytokinin content in rice显示文摘Inflorescence architecture is a major determinant of spikelet numbers per panicle, a key component of grain yield in rice. In this study, Short Panicle 3(SP3) was identified from a short panicle 3(sp3) mutant in which T-DNA was inserted in the promoter of SP3, resulting in a knockdown mutation. SP3 encodes a DNA binding with one finger(Dof) transcriptional activator. Quantitative real time(q RT)-PCR and RNA in situ hybridization assays confirmed that SP3 is preferentially expressed in the young rice inflorescence, specifically in the branch primordial regions. SP3 acts as a negative regulator of inflorescence meristem abortion by upregulating APO2/RFL. SP3 both up-and downregulates expression of genes involved in cytokinin biosynthesis and catabolism, respectively. Consequently, cytokinin concentrations are decreased in young sp3 panicles, thereby leading to small panicles having fewer branches and spikelets. Our findings support a model in which SP3 regulates panicle architecture by modulating cytokinin homeostasis. Potential applications to rice breeding, through gene-editing of the SP3 promoter are assessed. | Yong Huang Xufeng Bai Meifang Luo Yongzhong Xing | 2019 | Journal of Integrative Plant Biology2019，61，9： | 10 |
| 2 | 水稻小穗器官发生分子调控机制的研究进展显示文摘小穗是否正常发育直接影响水稻的产量和后代繁殖,其发育的分子调控机制一直是作物生殖发育研究的热点之一。水稻小穗发育包括花分生组织命运决定及转变、退化颖片和不育外稃的发育、花器官属性确立和形态建成,以及花分生组织终止生长等一系列连续的过程。重点介绍近年来国内外研究者在四聚体模型、内外稃属性、花分生组织命运转变以及小穗发育的表观遗传调控等方向的最新研究进展。 | 吴迪 袁政 张大兵 | 2018 | 生命科学2018，30，11： | 4 |
| 3 | Synergistic roles of LAX1 and FZP in the development of rice sterile lemma显示文摘Rice florets are subtended by two sterile lemmas,whose origin and biological functions have not been studied extensively.Here we demonstrate that two putative transcription factors,LAX PANICLE1(LAX1)and FRIZZY PANICLE(FZP),synergistically control the development of sterile lemmas.Both LAX1 and FZP are previously known for their roles in panicle and floret development.Disruption of either LAX1 or FZP greatly reduces the number of floret development.We generated new lax1 mutants(lax1-c)using CRISPR/Cas9 gene editing technology.In addition to the expected lax panicle phenotypes,we noticed that a significant number of spikelets of lax1-c developed elongated sterile lemmas.Moreover,our characterization of lax1-RNAi plants also revealed sterile lemma phenotypes similar to lax1-c mutants.We isolated a weak allele of fzp(fzp-14)in a genetic screen for lax1–1 enhancers.The fzp-14 lax1–1 double mutants completely eliminated flower development.Interestingly,the isolated fzp-14 produced spikelets with elongated sterile lemmas.Furthermore,fzp-14 was haploid-insufficient in the lax1–1 background whereas fzp-14 heterozygous plants were indistinguishable from wild type plants.The lax1–1 fzp-14+/−also developed elongated sterile lemma as observed in lax1-c,lax1-RNAi,and fzp-14,suggesting that LAX1 and FZP synergistically control sterile lemma development. | Yidong Wang Shanshan Wei Yubing He Lang Yan Rongchen Wang Yunde Zhao | 2020 | The Crop Journal2020，8，1： | 1 |
| 4 | OsHG3 Affects Rice Palea Development, Grain Yield and Quality显示文摘Floral development is one of the most important determining factors of grain yield in cereal crops(Immink et al,2010).The rice inflorescence is composed of the spikelet,a specific structural unit in poaceae,which is greatly different from typical eudicots.However,several genes encoding the homologous of the proteins in ABCDE model were also found in rice genome(Luo and Zhu,2002).Lemma and palea are grass-specific floret tissues which interlock with each other to protect the inner floral organs and seeds from attack by pathogens,insects or abiotic stresses.Meanwhile,they have photosynthetic ability and provide amino acids and carbohydrates to grouting seeds. | Ouyang Linjuan Xu Minyu Hu Jiang Zhu Lixin Li Ting Xu Yilei Zhu Changlan Peng Xiaosong Chen Xiaorong He Haohua Xu Jie | 2020 | Rice science2020，27，5： | 0 |
| 5 | Plant reproduction: Recent discoveries from China显示文摘Sexual reproduction in higher plants consists of several major biological processes which include mega- and micro-gametogenesis,male-female communications,embryogenesis and endosperm development.Male-female communications include male gametophyte-sporophytic tissues(stigma/transmitting tract)interaction and male-female gametophyte communication,during which various signaling path- | Li-Jia qu Meng-Xiang Sun | 2017 | Journal of Integrative Plant Biology2017，59，9： | 0 |
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