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Cytokinin signal transduction:Known simplicity and unknown complexity

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chinese Science Bulletin 2003年第13期48卷 1309-1315页

作者： ZHENG Binglian, SUN Jiaqiang, ZHANG Suzhi, DENG Yan & zuo jianru institute of genetics and developmental biology, chinese academy of sciences, beijing 100101, china Correspondence should be addressed to zuo jianru (e-mail: jrzuo@ ***) institute of genetics and Development biology Chinese Academy of Sciences China

Cytokinin plays a critical role in plant growth and development by regulating cell divisions and cell differentiation. Recent studies suggest that cytokinin signaling is presumably mediated by a two-component system analogous to those found in bacteria and fungi, which transduces an external signal via a phosphorelay from the plasma membrane-anchored receptors to downstream effectors and regulators. Moreover, cytokinin signaling is highly interactive with other pathways, and many components of the pathway appear to be functionally redundant. Proper address of these questions will be crucial for our further understanding on this important network.

关键词：细胞分裂素信号转换植物生长基因突变

Genetic and lipidomic analyses reveal the key role of lipid metabolism for cold tolerance in maize

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Journal of genetics and Genomics 2024年第3期51卷 326-337页

作者： Lei Gao Haifang Jiang Minze Li Danfeng Wang Hongtao Xiang Rong Zeng Limei Chen Xiaoyan Zhang jianru zuo Shuhua Yang Yiting shi State Key Laboratory of Plant Environmental Resilience College of Biological SciencesFrontiers Science Center for Molecular Design BreedingCenter for Crop Functional Genomics and Molecular BreedingChina Agricultural UniversityBeijing 100193China State Key Laboratory of Wheat&Maize Crop Science College of Life SciencesHenan Agricultural UniversityZhengzhouHenan 450002China State Key Laboratory of Plant Genomics Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China University of chinese academy of sciences Beijing 100049China Suihua Branch of Heilongjiang academy of Agricultural Machinery sciences SuihuaHeilongjiang 152052China

Lipid remodeling is crucial for cold tolerance in ***,the precise alternations of lipidomics during cold responses remain elusive,especially in maize(Zea mays L.).In addition,the key genes responsible for cold tolerance in maize lipid metabolism have not been ***,we integrate lipidomic,transcriptomic,and genetic analysis to determine the profile of lipid remodeling caused by cold *** find that the homeostasis of cellular lipid metabolism is essential for maintaining cold tolerance of ***,we detect 210 lipid species belonging to 13 major classes,covering phospholipids,glycerides,glycolipids,and free fatty *** lipid metabolites undergo specific and selective alterations in response to cold stress,especially mono-/di-unsaturated lysophosphatidic acid,lysophosphatidylcholine,phosphatidylcholine,and phosphatidylinositol,as well as polyunsaturated phosphatidic acid,monogalactosyldiacylglycerol,diacylglycerol,and *** addition,we identify a subset of key enzymes,including ketoacyl-acyl-carrier protein synthase II(KAS II),acyl-carrier protein 2(ACP2),male sterility33(Ms33),and stearoyl-acyl-carrier protein desaturase 2(SAD2)involved in glycerolipid biosynthetic pathways are positive regulators of maize cold *** results reveal a comprehensive lipidomic profile during the cold response of maize and provide genetic resources for enhancing cold tolerance in crops.

关键词： Maize Cold stress Lipid metabolism Transcriptome Lipidomic

Genetic variation in a heat shock transcription factor modulates cold tolerance in maize

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Molecular Plant 2024年第9期17卷 1423-1438页

作者： Lei Gao Lingling Pan Yiting shi Rong Zeng Minze Li Zhuoyang Li Xuan Zhang Xiaoming Zhao Xinru Gong Wei Huang Xiaohong Yang Jinsheng Lai jianru zuo Zhizhong Gong Xiqing Wang Weiwei Jin Zhaobin dong Shuhua Yang State Key Laboratory of Plant Environmental Resilience Frontiers Science Center for Molecular Design BreedingCollege of Biological SciencesCenter for Crop Functional Genomics and Molecular BreedingChina Agricultural UniversityBeijing 100193China State Key Laboratory of Maize Bio-breeding National Maize Improvement CenterFrontiers Science Center for Molecular Design BreedingDepartment of Plant Geneticsand BreedingChinaAgricultural UniversityBeijingChina State Key Laboratory of Plant Genomics and National Plant Gene Research Center Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing100101China

Understanding how maize(Zea mays)responds to cold stress is crucial for facilitating breeding programs of cold-tolerant *** extensive utilization of the genome-wide association study(GWAs)approach for exploring favorable natural alleles associated with maize cold tolerance,few studies have successfully identified candidate genes that contribute to maize cold *** this study,we used a diverse panel of inbred maize lines collected from different germplasm sources to perform a GWAS on var-iations in the relative injured area of maize true leaves during cold stress-a trait very closely correlated with maize cold *** identified HsF21,which encodes a B-class heat shock transcription factor(HSF)that positively regulates cold tolerance at both the seedling and germination *** varia-tions in the promoter of the cold-tolerant HSF21Hap1 allele led to increased HSF21 expression under cold stress by inhibiting binding of the basic leucine zipper bziP68 transcription factor,a negative regulator of cold *** integrating transcriptome deep sequencing,DNA affinity purification sequencing,and targeted lipidomic analysis,we revealed the function of HsF21 in regulating lipid metabolism homeo-stasis to modulate cold tolerance in *** addition,we found that HsF21 confers maize cold tolerance without incurring yield ***,this study establishes HsF21 as a key regulator that en-hances cold tolerance in maize,providing valuable genetic resources for breeding of cold-tolerant maize varieties.

关键词： heat shock factor HSF21 cold tolerance natural variation bZiP68 lipid metabolism maize

PAT: waking up a lazy sleeping beauty

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Cell Research 2007年第05期17卷 387-388页

作者： Xiangdong Fu jianru zuo, National Center for Plant Gene Research, institute of genetics and developmental biology, chinese academy of sciences, beijing 100101, china. xdfu@*** NationalCenterforPlantGeneResearch InstituteofGeneticsandDevelopmentalBiologyChineseAcademyofSciencesBeijing100101China

Once upon a time, there was an unusual corn; and un-like its normal siblings, its stalk grew towards the groundrather than in an upward direction. The sleeping stature ofthe corn was portrayed in early 1930s as "lazy" by Jenkinsand Gerhardt [1]. Later, lazy appeared to be a fashionin the plant kingdom, found in rice, barley, tomato andseveral other species [2]. These seemingly magic spell-chanted plants have drawn considerable interests of plantbiologists and breeders for many decades. To breeders, thelazy phenotype, viewed as tillering or branching anglesof stems (or termed as culms in crop plants), represents akey characteristic important for controlling photosynthesisefficiency and planting density, and thus a crucial factor indetermining crop production [6]. Previous physiologicalstudies suggested that the prostrate or lazy phenotype wasattributed, at least in part, to the loss of gravitropism. Forexample, the rice lazyl plants are ageotropic, whereas wildtype (WT) plants are negatively geotropic [2]. Gravity plays a major role in plant morphogenesis bydetermining the directional growth of plant organs. Upongermination, shoots grow upward, capturing light, and bycontrast, roots penetrate the soil and grow downward, tak-

关键词： waking up a lazy sleeping beauty PAT

Journal of genetics and Genomics in 2023:progresses and beyond

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Journal of genetics and Genomics 2024年第1期51卷 1-2页

作者： Xiu-Fen Song Xiaoxuan Guo Jing Zhao Yutian Zhang Yuan Qin jianru zuo Journal of genetics and Genomics Institute of Genetics and Developmental BiologyChinese Academy of Sciences&the Genetics Society of ChinaBeijing 100101China

Journal of genetics and Genomics(JGG),launched in 1974,celebrates its 50th birthday in *** continuous support from our authors,reviewers,readers,and the editorial board,JGG has made remarkable progress in the past year by publishing 122 papers covering major disciplines in life sciences and medical genetics with exciting *** is worthwhile to note that we have recruited 66 young talents to join JGG as junior editors,resulting in significant improvement in manuscript evaluation and journal ***,we summarize major progresses reported in JGG in 2023 fromaneditorial view.

关键词： journal beyond promotion

Genetic Dissection of the Cytokinin Signaling Pathway in Arabidopsis thaliana

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Genetic Dissection of the Cytokinin Signaling Pathway in Ara...

中国细胞生物学学会第八届会员代表大会暨学术大会

作者： Jiaqiang Sun, Binglian Zheng, Suzhi Zhang and jianru zuo~* institute of genetics and developmental biology, chinese academy of sciences, 917 Datun Road, beijing 100101, china (Contributed equally to this work

Cytokinin is a key growth regulator implicatcd in many aspccts of plantgrowth and development, including the control of the apical dominance, rootgrowth, vascular tissuc development, nowering time and leaf senescence. Recentstudies suggested that cytokinin signal transduction may employ a mechanismsimilar to that of the prokaryotic two-component system. However, themolecular mechanism of the cytokinin signaling remains largely unknown. Wehave previously identified two gain-of-function mutations pga1 and pga22, whichcaused typical cytokinin response in thc absence of the hormone. Molecular

关键词： cytokinin mutants Arabidopsis suppressors of ckil suppressor of ipt8

Cytokinin Signaling in Arabidopsis

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Cytokinin Signaling in Arabidopsis

植物分子生物学与现代农业——2010全国植物生物学研讨会

作者： Yan Deng,haili dong,Jinye Mu,Bo Ren,Wei-Cai Yang,and jianru zuo~* State Key Laboratory of Plant Genomics and National Plant Gene Research Center,institute of genetics and developmental biology,chinese academy of sciences,beijing 100101,china

Cytokinin is a key growth regulator involved in the regulation of a wide range of developmental processes by regulating cell division and cell differentiation through a two-component system(TCS) signaling *** components of the TCS have been defined by genetic and biochemical *** Arabidopsis,TCS mainly consists of the histidine kinase(HK)-type receptors,histidine phosphotransfer proteins(HP) and

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The Arabidopsis Spontaneous Cell Death1 gene, encoding a ζ-carotene desaturase essential for carotenoid biosynthesis, is involved in chloroplast development, photoprotection and retrograde signalling

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Cell Research 2007年第6期17卷 458-470页

作者： haili dong1,2 Yan Deng1,2 Jinye Mu1 Qingtao Lu3 Yiqin Wang1 Yunyuan Xu3 Chengcai Chu1 Kang chong3 Congming Lu3 jianru zuo1 1 State Key Laboratory of Plant Genomics and National Plant Gene Research Center (beijing), institute of genetics and developmental biology, chinese academy of sciences, Beoing 100101, china 2 Graduate School, chinese academy of sciences, beijing 100039, china 3 institute of Botany, chinese academy of sciences, beijing 100093, china InstituteofGeneticsandDevelopmentalBiologyChineseAcademyofSciencesBeijing100101China GraduateSchoolchineseacademyofsciences Beijing

Carotenoids, a class of natural pigments found in all photosynthetic organisms, are involved in a variety of physiologi-cal processes, including coloration, photoprotection, biosynthesis of abscisic acid (ABA) and chloroplast *** carotenoid biosynthesis has been well studied biochemically, the genetic basis of the pathway is not wellunderstood. Here, we report the characterization of two allelic Arabidopsis mutants, spontaneous cell death 1-1 (spcl-1)and spcl-2. The weak allele spcl-1 mutant showed characteristics of bleached leaves, accumulation of superoxide andmosaic cell death. The strong mutant allele spcl-2 caused a complete arrest of plant growth and development shortlyafter germination, leading to a seedling-lethal phenotype. Genetic and molecular analyses indicated that SPC1 encodesa putative ζ-carotene desaturase (ZDS) in the carotenoid biosynthesis pathway. Analysis of carotenoids revealed thatseveral major carotenoid compounds downstream of SPC1/ZDS were substantially reduced in spcl-1, suggesting thatSPC1 is a functional ZDS. Consistent with the downregulated expression of CAO and PORB, the chlorophyll contentwas decreased in spcl-1 plants. In addition, expression of Lhcb1.1, Lhcb1.4 and RbcS was absent in spcl-2, suggestingthe possible involvement of carotenoids in the plastid-to-nucleus retrograde signaling. The spcl-1 mutant also displaysan ABA-deficient phenotype that can be partially rescued by the externally supplied phytohormone. These results suggestthat SPC1/ZDS is essential for biosynthesis of carotenoids and plays a crucial role in plant growth and development.

关键词： carotenoid biosynthesis cell death chloroplast development photoprotection Arabidopsis SPC1/ZDS

Metabolic and cellular features of rice endosperms revealed by proteomics approaches

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Metabolic and cellular features of rice endosperms revealed ...

中国遗传学会植物遗传和基因组学专业委员会2009年学术研讨会

作者： Sheng Bao Xu~1,Hua Tao Yu~1,Kang chong~1,Yongbiao Xue,and Tai Wang~(1*) 1 Research Center for Molecular & developmental biology,Key Laboratory of Photosynthesis & Environmental Molecular Physiology,institute of Botany,chinese academy of sciences,and National Center for Plant Gene Reserch,beijing 100093 2 Key Laboratory of Molecular and developmental biology,institute of genetics and developmental biology,beijing 100010

The endosperm at storage phase experiences a decreased oxygen content,and undergoes a serial of coordinated cellular and metabolic events including starchy endosperm cell death, starch synthesis and starch granule packaging leading to efficient reverse accumulation. Proteomics analysis has revealed a switch from central carbon metabolism to alcoholic

关键词： ROS-antioxidant interaction endosperm programmed cell death starch granule Oryza sativa.