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| 1 | DELLA蛋白介导的激素互作调控植物生长发育研究进展显示文摘植物可利用植物激素整合并传递体内外各种信号以不断调整自身生长发育来适应环境,而各种植物激素如何通过交叉互作共同参与该调控过程已成为植物学研究领域的一个热点。其中,激素信号通路中部分重要调控因子同时作用于多种激素的合成及信号转导过程是激素交叉互作的重要分子机制之一。GA信号通路中的DELLA蛋白即是这样一个重要的调控因子。本文在简要介绍DELLA蛋白结构和功能的基础上,重点综述了DELLA蛋白介导各种激素调控植物生长发育及响应环境刺激的最新进展,最终将各激素整合到一个以DELLA蛋白为中心的植物激素调控网络中。 | 周鹏 李钱峰 熊敏 范晓磊 赵冬生 张昌泉 刘巧泉 | 2020 | 植物生理学报2020，，4： | 9 |
| 2 | Origin, evolution, and molecular function of DELLA proteins in plants显示文摘Gibberellic acid(GA), a ubiquitous phytohormone, has various effects on regulators of plant growth and development. GAs promote growth by overcoming growth restraint mediated by DELLA proteins(DELLAs). DELLAs, in the GRAS family of plant-specific nuclear proteins, are nuclear transcriptional regulators harboring a unique N-terminal GA perception region for binding the GA receptor GIBBERELLIN INSENSITIVE DWARF1(GID1) and a C-terminal GRAS domain necessary for GA repression activity via interaction with multiple regulatory proteins. The N-terminal conserved region of DELLAs evolved to form a mode of GID1/DELLA-mediated GA signaling originating in bryophytes and ferns. Binding of GA to GID1 increases the affinity between DELLAs and a SCF E3 ubiquitin–ligase complex, thus promoting the eventual destruction of DELLAs by the 26 S proteasome. DELLAs negatively regulate GA response by releasing transcription factors to directly activate downstream genes and indirectly regulate GA biosynthesis genes increasing GA responsiveness and feedback control by promoting GID1 transcription. GA communicates extensively with other plant hormones and uses crosstalk to regulate plant growth and development. In this review, we summarize current understanding of evolutionary DELLA-mediated gibberellin signaling and functional diversification of DELLA, focusing primarily on interactions of DELLAs with diverse phytohormones. | Huidan Xue Xiang Gao Peng He Guanghui Xiao | 2022 | The Crop Journal2022，10，2： | 5 |
| 3 | SPINDLY在壳寡糖诱导拟南芥抗丁香假单胞菌中的功能显示文摘为了探讨拟南芥O-岩藻糖基转移酶(SPINDLY)在病原体相关分子模式诱导抗性中的作用,该研究以SPINDLY缺失拟南芥突变体spy-3为实验材料,从叶片表型、病情指数、病菌定殖量以及丁香假单胞菌(Pst DC3000)关键基因的表达水平等指标,系统考察了SPINDLY在壳寡糖诱导拟南芥抗Pst DC3000中的功能。结果显示:(1)spy-3突变体比野生型更易被Pst DC3000侵染。(2)与病菌侵染组相比,壳寡糖预处理明显缓解植株叶片黄化现象,显著降低Pst DC3000的定殖量。(3)壳寡糖预处理的spy-3植株中水杨酸和茉莉酸途径相关基因的表达量及水杨酸和茉莉酸含量均较病菌侵染组明显升高。(4)壳寡糖在spy-3中的诱抗效果与野生型相比无明显差别。研究表明,SPINDLY在植物先天免疫过程发挥重要作用,但并不影响壳寡糖的诱导抗性。 | 刘俊杰 贾晓晨 赵小明 王文霞 尹恒 | 2020 | 西北植物学报2020，40，5： | 5 |
| 4 | 氮素和光照对甜菊生长、氮素吸收和甜菊糖苷相关指标的影响显示文摘研究了氮素和光照对甜菊(Stevia rebaudiana Bertoni)品种‘守田3号’(‘Shoutian No.3’)和‘中山8号’(‘Zhongshan No.8’)生长、氮素吸收以及叶片中甜菊糖苷含量和积累量的影响。结果表明:总体上看,同一光照处理下,与不施氮处理相比,施氮处理下2个甜菊品种单株地上部干质量、叶片叶绿素相对含量、叶片和茎中氮素含量、单株叶片和茎中氮素积累量以及单株总甜菊糖苷积累量显著升高,叶茎比、比叶质量、叶片氮素分配比例以及叶片中总甜菊糖苷和可溶性糖含量显著降低。同一氮素处理下,与正常光照处理相比,弱光处理下2个甜菊品种单株地上部干质量、叶茎比、比叶质量、叶片叶绿素相对含量及单株叶片和茎中氮素积累量总体上显著降低,叶片和茎中氮素含量总体上显著升高。不施氮处理下,与正常光照处理相比,弱光处理下甜菊品种‘中山8号’叶片中总甜菊糖苷和可溶性糖含量显著降低,甜菊品种‘守田3号’叶片中总甜菊糖苷和可溶性糖含量无显著变化;而施氮处理下,弱光处理对2个甜菊品种叶片中总甜菊糖苷和可溶性糖含量总体上无显著影响。与正常光照处理相比,弱光处理下2个甜菊品种单株总甜菊糖苷积累量显著降低。方差分析结果显示:氮素与光照的互作对甜菊单株地上部干质量、单株叶面积、单株叶片和茎中氮素积累量、叶片中总甜菊糖苷和可溶性糖含量以及单株总甜菊糖苷积累量有显著或极显著影响。综上所述,供试2个甜菊品种的干质量和氮素含量均受光照和氮素水平的影响,而叶片甜菊糖苷含量主要受氮素水平的调控。 | 孙玉明 张婷 徐晓洋 张永侠 杨永恒 原海燕 | 2021 | 植物资源与环境学报2021，30，2： | 5 |
| 5 | 拟南芥PUB10和PUB11基因抵抗丁香假单胞杆菌番茄致病变种DC3000株的功能分析显示文摘丁香假单胞杆菌Pseudomonas syringae pv tomato(Pst)DC3000是研究植物免疫机制的常用病原菌。为分析拟南芥E3泛素连接酶PUB10、PUB11在免疫中的功能,本研究构建了pub10/pub11双突变体。在分析拟南芥PUB10、PUB11序列相似性和进化关系的基础上,比较了pub10/pub11双突变体和Col-0对Pst DC3000的敏感性、MAPK磷酸化水平、ROS产生的影响,并检测JA信号响应途径和免疫防御相关的部分代表性基因的表达量。结果表明PUB10、PUB11氨基酸序列高度保守,pub10/pub11双突变体对Pst DC3000的侵染更敏感,侵染后叶片病原菌数目明显增多,MAPK磷酸化水平迅速下降,ROS释放量降低,JA信号响应基因(LOX3,JR2)、免疫防御负调控基因(NIMIN1,WRKY38,WRKY62,RIN4)表达量上升显著高于Col-0,而免疫防御正调控基因(AZI1,EDS1,PAD4,EDS5,FMO1,NPR1)表达量显著低于Col-0。由此推断,AtPUB10、AtPUB11在防御Pst DC3000中起正调控作用,并且存在功能冗余。研究结果为进一步探索PUB10、PUB11调控植物防御的分子作用机制和分子育种提供了依据。 | 余涛涛 李驰宇 于峰 廖红东 | 2021 | 分子植物育种2021，19，6： | 1 |
| 6 | The BZR1-EDS1 module regulates plant growth-defense coordination显示文摘Plants have developed sophisticated strategies to coordinate growth and immunity,but our understanding of the underlying mechanism remains limited.In this study,we identified a novel molecular module that reg-ulates plant growth and defense in both compatible and incompatible infections.This module consisted of BZR1,a key transcription factor in brassinosteroid(BR)signaling,and EDS1,an essential positive regulator of plant innate immunity.We found that EDS1 interacts with BZR1 and suppresses its transcriptional activ-ities.Consistently,upregulation of EDS1 function by a virulent Pseudomonas syringae strain or salicylic acid treatment inhibited BZR1-regulated expression of BR-responsive genes and BR-promoted growth.Furthermore,we showed that the cytoplasmic fraction of BZR1 positively regulates effector-triggered im-munity(ETI)controlled by the TIR-NB-LRR protein RPS4,which is attenuated by BZR1's nuclear transloca-tion.Mechanistically,cytoplasmic BZR1 facilitated AvrRps4-triggered dissociation of EDS1 and RPS4 by binding to EDS1,thus leading to efficient activation of RPS4-controlled ETI.Notably,transgenic expression of a mutant BZR1 that accumulates exclusively in the cytoplasm improved pathogen resistance without compromising plant growth.Collectively,these results shed new light on plant growth-defense coordina-tion and reveal a previously unknown function for the cytoplasmic fraction of BZR1.The BZR1-EDS1 mod-ule may be harnessed for the simultaneous improvement of crop productivity and pathogen resistance. | Guang Qi Huan Chen Dian Wang Hongyuan Zheng Xianfeng Tang Zhengzheng Guo Jiayu Cheng Jian Chen Yiping Wang Ming-yi Bai Fengquan Liu Daowen Wang Zheng Qing Fu | 2021 | Molecular Plant2021，14，12： | 1 |
| 7 | The rice miR171b–SCL6-IIs module controls blast resistance,grain yield,and flowering显示文摘Micro RNAs(mi RNAs)act as regulators of plant development and multiple stress responses.Here we demonstrate that the rice mi R171 b-SCL6-IIs module regulates the balance between blast resistance,grain yield,and flowering.mi R171 b-overexpressing rice plants(OX171 b)displayed increased rice blast resistance accompanied with enhanced defense responses and late heading,whereas blocking mi R171 b expression in rice(MIM171)led to greater susceptibility to blast disease,associated with compromised defense responses and early heading.Either overexpressing or silencing of mi R171 b significantly affected plant height and number of filled seeds per panicle(seed-setting rate),resulting in decreased grain yield.mi R171 b targets SCL6-IIa,SCL6-IIb,and SCL6-IIc,whose expression was suppressed in OX171 b but increased in MIM171.Mutants of SCL6-IIa,SCL6-IIb,and SCL6-IIc all displayed phenotypes like that of OX171 b,including markedly increased blast disease resistance,slightly decreased grain yield,and delayed flowering.Amounts of mi R171 b increased gradually in leaves during the vegetative stage but decreased gradually in panicles during the reproductive stage,whereas SCL6-IIs displayed the reverse expression pattern.Together,these results suggest that the expression of mi R171 b was time-and space-dependent during the rice growth period and regulated the balance between rice blast disease resistance,grain yield,and flowering via SCL6-IIs,and that appropriate accumulation of mi R171 b is essential for rice development. | Yan Li Ying Tong Xiaorong He Yong Zhu Tingting Li Xiaoyu Lin Wei Mao Zeeshan Ghulam Nabi Gishkori Zhixue Zhao Jiwei Zhang Yanyan Huang Mei Pu Jing Fan Jing Wang Wenming Wang | 2022 | The Crop Journal2022，10，1： | 1 |
| 8 | 橡胶树DELLA基因HbRGL1的克隆与表达分析显示文摘DELLA蛋白属于植物特异性GRAS家族,是植物生长的负调控因子。为揭示橡胶树DELLA基因在橡胶树生长发育中的分子调控机制,本研究从橡胶树热研7-33-97中克隆HbRGL1的cDNA全长序列,含1 851 bp的ORF,编码616个氨基酸。生物信息学分析表明HbRGL1属于不稳定的亲水蛋白,定位在细胞核上,含有DELLA和GRAS保守结构域。系统进化关系分析表明HbRGL1与橡胶树HbGAIL、木薯MeGAIL、蓖麻RcGAI、麻风树JcGAI聚为一类。qRT-PCR分析表明HbRGL1在橡胶树不同组织中的表达量差异显著,在花中的表达量最高。在生长素(IAA)、乙烯利(ET)和脱落酸(ABA)等不同激素处理叶片中HbRGL1表达量均呈现显著上调趋势,尤其对赤霉素(GA_(3))的应答具有反应快速且上调表达倍数最高。本研究为进一步阐明HbRGL1在橡胶树生长发育中的功能奠定理论基础。 | 覃碧 刘明洋 王萌 王立丰 黄飞 | 2022 | 植物研究2022，42，6： | 0 |
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