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中国植物生理学会第十次会员代表大会暨全国学术年会

作者： Guohui Zhu1, Nenghui Ye2 and Jianhua Zhang2* 1College of Life Science, South China Agricultural University, Guangdong, PR China 2Department of Biology, Hong Kong Baptist University, Hong Kong, PR China

＜正＞Both glucose and aba play crucial roles in the regulation of seed germination and post-germination development. In Arabidopsis thaliana, up-regulation of aba biosynthesis is suggested as one of the possible

关键词： aba aba biosynthesis aba catabolism Rice (Oryza sativa ) Seed germination Sugar sensing

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DNA methylation controlling abscisic acid catabolism responds to light to mediate strawberry fruit ripening

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Journal of Integrative Plant Biology 2024年第8期66卷 1718-1734页

作者： Yunfan Sun Xiaofang Yang Rongrong Wu Shouzheng Lv Yunduan Li Haoran Jia Yuying Yang Baijun Li Wenbo Chen Andrew C.Allan Guihua Jiang Yan-Na Shi Kunsong Chen College of Agriculture&Biotechnology Zhejiang UniversityZijingang CampusHangzhou 310058China Institute of Horticulture Zhejiang Academy of Agricultural SciencesHangzhouZhejiang 310021China Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology Zhejiang UniversityZijingang CampusHangzhou 310058China The State Agriculture Ministry Laboratory of Horticultural Plant Growth Development and Quality ImprovementZhejiang UniversityZijingang CampusHangzhou 310058China New Zealand Institute for Plant&Food Research Limited Private Bag 92169AucklandNew Zealand School of Biological Sciences University of AucklandPrivate Bag 92019AucklandNew Zealand

Phytohormones,epigenetic regulation and environmental factors regulate fruit ripening but their interplay during strawberry fruit ripening remains to be *** this study,bagged strawberry fruit exhibited delayed ripening compared with fruit grown in normal light,correlating with reduced abscisic acid(aba) *** of the key aba catabolism gene,aba 8′-hydroxylase FaCYP707A4,was induced in bagged *** light exclusion whole genome DNA methylation levels were up-regulated,corresponding to a delayed ripening process,while DNA methylation levels in the promoter of FaCYP707A4 were suppressed,correlating with increases in transcript and decreased aba *** indicated FaCRY1,a blue light receptor repressed in bagged fruit and FaAGO4,a key protein involved in RNA-directed DNA methylation,could bind to the promoter of *** interaction between FaCRY1 and FaAGO4,and an increased enrichment of FaAGO4 directed to the FaCYP707A4 promoter in fruit grown under light suggests FaCRY1 may influence FaAGO4 to modulate the DNA methylation status of the FaCYP707A4 ***,transient overexpression of FaCRY1,or an increase in FaCRY1 transcription by blue light treatment,increases the methylation level of the FaCYP707A4 promoter,while transient RNA interference of FaCRY1 displayed opposite *** findings reveal a mechanism by which DNA methylation influences aba catabolism,and participates in light-mediated strawberry ripening.

关键词： aba catabolism DNA methylation light ripening strawberry

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Giving maize an excited start-Effects of dopamine on maize germination

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Journal of Integrative Agriculture 2020年第11期19卷 2690-2698页

作者： CHENG Hang-yuan WANG Xing FENG Tian-yu PENG Chuan-xi WANG Wei YANG Mu-yu ZHOU Yu-yi College of Agronomy and Biotechnology China Agricultural UniversityBeijing 100193P.R.China Engineering Research Center of Plant Growth Regulator Ministry of EducationBeijing 100193P.R.China

Dopamine(DA)is a neurotransmitter which takes charge of brain activities about memory and self-stimulation behavior in ***,our results suggest that DA could also give maize an“excited state”.The results showed that 1 mmol L–1 DA promoted maize germination by 23.2%significantly,and accelerated the growth rate of roots and shoots by 21.4 and 24.7%,*** we all known,abscisic acid(aba)is the key hormone involved in seed *** our research,aba levels in roots and shoots dramatically decreased by 16.45 and 57.57%,*** further investigate how DA reduces the aba level in budding seed,we studied aba synthesis and catabolism *** expression of key aba-synthesis genes,such as ZmNCED1,ZmNCED3 and ZmZEP were down-regulated by ***,the expression levels of aba8OX1a and aba8OX1b which are major transcripts of aba 8´-hydroxylase in aba catabolism were up-regulated at least 1.5-and 4.6-fold,*** results enriched the functions of animal hormones in plants.

关键词： dopamine(DA) maize germination aba synthesis aba catabolism

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The Flowering Repressor SVP Confers Drought Resistance in Arabidopsis by Regulating Abscisic Acid catabolism

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Molecular Plant 2018年第9期11卷 1184-1197页

作者： Zhen Wang Fuxing Wang Yechun Hong Juanjuan Yao Zhizhong Ren Huazhong Shi Jian-Kang Zhu Shanghai Center for Plant Stress Biology and Center for Excellence in Molecular Plant Sciences Chinese Academy of Sciences Shanghai 200032 P.R. China University of Chinese Academy of Sciences (CAS) Shanghai 200032 P.R. China Department of Chemistry and Biochemistry Texas Tech University Lubbock TX 79409 USA Department of Horticulture and Landscape Architecture Purdue University West Lafayette IN 47907 USA These authors contributed equally to this article

Terrestrial plants must cope with drought stress to survive. Under drought stress, plants accumulate the phytohormone abscisic acid （aba） by increasing its biosynthesis and decreasing its catabolism. However, the regulatory pathways controlling aba catabolism in response to drought remain largely unclear. Here, we report that the flowering repressor SHORT VEGETATIVE PHASE （SVP） is induced by drought stress and associates with the promoter regions of the aba catabolism pathway genes CYP707A 1, CYP707A3 and AtBG1, causing decreased expression of CYP7OTA 1 and CYP707A3 but enhanced expression ofAtBG1 inArabidopsis leaves. Loss-of-function mutations in CYP707A 1 and CYP707A3 or overexpression of AtBG1 could rescue the drought-hypersensitive phenotype of svp mutant plants by increasing cellular aba levels. Collectively, our results suggest that SVP is a central regulator of aba catabolism and that a regulatory pathway involving SVP, CYP707A1/3, and AtBG1 plays a critical role in plant response to water deficit and plant drought resistance.

关键词： SVP CYP707A1 CYP707A3 AtBG1 aba catabolism drought resistance

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Neophaseic acid catabolism in the 90 -hydroxylation pathway of abscisic acid in Arabidopsis thaliana

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Plant Communications 2022年第5期3卷 132-143页

作者： Ya-Li Bai Xiaoming Yin Cai-Feng Xiong Bao-Dong Cai Yan Wu Xiao-Yun Zhang Zhenwei Wei Tiantian Ye Yu-Qi Feng Department of Chemistry Wuhan UniversityWuhan 430072P.R.China State Key Laboratory of Hybrid Rice College of Life SciencesWuhan UniversityWuhan 430072P.R.China Department of Chemistry Lanzhou UniversityLanzhou 730000P.R.China Frontier Science Center for Immunology and Metabolism Wuhan UniversityWuhan 430072P.R.China

Abscisic acid(aba)hydroxylation is an important pathway for aba inactivation and homeostasis ***,we discover a new downstream catabolite of neophaseic acid(neoPA)in the aba 90-hydroxyl pathway and identify it as epi-neodihydrophaseic acid(epi-neoDPA)by comparing its accurate mass,retention time,and MSn spectra with those of our chemically synthesized *** of Arabidopsis seed germination and aba-related gene expression reveal that neoPA rather than epi-neoDPA possesses aba-like hormonal *** vitro enzyme activity tests of prokaryotic recombinant protein reveal that NeoPAR1(neoPA reductase 1)identified from Arabidopsis converts neoPA into *** mutation at Tyr163 in the conserved motif of NeoPAR1 abolishes the catalytic activity of *** seed germination was observed in NeoPAR1 knockdown and knockout mutants,whereas retarded seed germination and the accumulation of epi-neoDPA and aba were observed in NeoPAR1 overexpression lines,suggesting that NeoPAR1 is involved in seed germination and maintenance of aba homeostasis.

关键词： abscisic acid aba catabolism epi-neoDPA neoPA reductase seed germination phaseic acid

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