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ζ-Carotene Isomerase Suppresses Tillering in Rice through the Coordinated Biosynthesis of Strigolactone and abscisic acid

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Molecular Plant 2020年第12期13卷 1784-1801页

作者： Xue Liu Qingliang Hu Jijun Yan Kai Sun Yan Liang Meiru Jia Xiangbing Meng Shuang Fang Yiqin Wang Yanhui Jing Guifu Liu Dianxing Wu Chengcai Chu Steven M.Smith Jinfang Chu Yonghong Wang Jiayang Li Bing Wang State Key Laboratory of Plant Genomics and National Center for Plant Gene Research(Beijing)Institute of Genetics and Developmental BiologyInnovation Academy for Seed DesignChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Rice Biology Institute of Nuclear Agriculture SciencesZhejiang UniversityHangzhou 310029China School of Natural Sciences University of TasmaniaHobart 7001Australia State Key Laboratory of Plant Genomics and National Center for Plant Gene Research(Beijing)Institute of Genetics and Developmental BiologyThe CAS Center for Excellence in Molecular Plant SciencesChinese Academy of SciencesBeijing 100101China College of Life Sciences Shandong Agricultural UniversityTaian 271018China

Rice tillering is an important agronomic trait affecting grain ***,we identified a high-tillering mutant tillering20(t20),which could be restored to the wild type by treatment with the strigolactone(SL)analog rac-GR24.T20 encodes a chloroplast ζ-carotene isomerase(Z-ISO),which is involved in the biosynthesis of ca-rotenoids and their metabolites,SL and abscisic acid(ABA).The t20 mutant has reduced SL and ABA,raising the question of how SL and ABA biosynthesis is coordinated,and whether they have overlapping functions in *** discovered that rac-GR24 stimulated T20 expression and enhanced all-trans-p-carotene ***,rac-GR24 also stimulated expression of Oryza sativa 9-CIS-EPOXY-CAROTENOID DIOXYGENASE 1(OsNCED1)through induction of Oryza sativa HOMEOBOX12(0sHOX12),promoting ABA biosynthesis in shoot *** the other hand,ABA treatment significantly repressed SL biosynthesis and the ABA biosynthetic mutants displayed elevated SL *** treatment reduced the number of basal tillers in both t20 and wild-type ***,while ABA-deficient mu-tants aba1 and aba2 had the same number of basal tillers as wild type,they had more unproductive upper tillers at *** work demonstrates complex interactions in the biosynthesis of carotenoid,SLs and ABA,and reveals a role for ABA in the regulation of rice tillering.

关键词： rice(Oryza sativa L.) tillering ζ-carotene isomerase carotenoid strigolactones abscisic acid

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Immunomagnetic assay combined with CdSe/ZnS amplification of chemiluminescence for the detection of abscisic acid

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Science China Chemistry 2011年第8期54卷 1298-1303页

作者： ZHOU GuoHua, WANG Ping, YUAN Ju, QIU Ting & HE ZhiKe Key Laboratory of Analytical Chemistry for Biology and Medicine, Ministry of Education College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China Key Laboratory of Analytical Chemistry for Biology and Medicine Ministry of Education College of Chemistry and Molecular Sciences Wuhan University Wuhan China

abscisic acid (ABA) is an important plant hormone. It plays a key role in regulating plant responses to abiotic stress and in controlling seed germination, growth, and stomatal aperture. A rapid, sensitive analytical method for the ABA detection is urgently required for further investigation of ABA signaling. In this work, an immunomagnetic assay combined with CdSe/ZnS amplification of chemiluminescence has been developed for the detection of ABA. The result could be read out in 30 min at least, with the simplified procedure of immunomagnetic assay. Under the optimized condition, a linear range from 1 pM to 10 nM was obtained. An unexpected result induced by the dose hook effect was discussed. This method provided the high selectivity for ABA over other components that might be contained in real samples.

关键词： abscisic acid immunomagnetic assay chemiluminescence CdSe/ZnS

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A Direct Link between abscisic acid Sensing and the Chromatin-Remodeling ATPase BRAHMA via Core ABA Signaling Pathway ComDonents

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Molecular Plant 2016年第1期9卷 136-147页

作者： Marta Peirats-Llobet Soon-Ki Han Miguel Gonzalez-Guzman Cheol Woong Jeong Lesia Rodriguez Borja Belda-Palazon Doris Wagner Pedro L. Rodriguez Instituto de Biologia Molecular y Celular de Plantas Consejo Superior de Investigaciones Cientfficas-Universidad Politecnica de Valencia 46022 Valencia Spain Department of Biology University of Pennsylvania Philadelphia PA 19104 USA These authors contributed equally to this article

Optimal response to drought is critical for plant survival and will affect biodiversity and crop performance during climate change. Mitotically heritable epigenetic or dynamic chromatin state changes have been implicated in the plant response to the drought stress hormone abscisic acid （ABA）. The Arabidopsis SWI/SNF chromatin-remodeling ATPase BRAHMA （BRM） modulates response to ABA by preventing pre- mature activation of stress response pathways during germination. We show that core ABA signaling pathway components physically interact with BRM and post-translationally modify BRM by phosphoryla- tion/dephosphorylation. Genetic evidence suggests that BRM acts downstream of SnRK2.2/2.3 kinases, and biochemical studies identified phosphorylation sites in the C-terminal region of BRM at SnRK2 target sites that are evolutionarUy conserved. Finally, the phosphomimetic BRMs17s^D S1762D mutant displays ABA hypersensitivity. Prior studies showed that BRM resides at target loci in the ABA pathway in the presence and absence of the stimulus, but is only active in the absence of ABA. Our data suggest that SnRK2- dependent phosphorylation of BRM leads to its inhibition, and PP2CA-mediated dephosphorylation of BRM restores the ability of BRM to repress ABA response. These findings point to the presence of a rapid phosphorylation-based switch to control BRM activity; this property could be potentially harnessed to improve drought tolerance in plants.

关键词： abscisic acid hormone signaling chromatin remodeling

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GID1 modulates stomatal response and submergence tolerance involving abscisic acid and gibberellic acid signaling in rice

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Journal of Integrative Plant Biology 2015年第11期57卷 954-968页

作者： Hao Du Yu Chang Fei Huang Lizhong Xiong National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research(Wuhan) Huazhong Agricultural University

Plant responses to abiotic stresses are coordinated by arrays of growth and developmental programs. Gibberellic acid （GA） and abscisic acid （ABA） play critical roles in the developmental programs and environmental responses, respectively, through complex signaling and metabolism networks. However, crosstalk between the two phytohormones in stress responses remains largely unknown. In this study, we report that GIBBERELLIN-INSENSITIVE DWARF 1 （GID1）, a soluble receptor for GA, regulates stomata[ develop- ment and patterning in rice （Oryza sativa L.）. The gidl mutant showed impaired biosynthesis of endogenous ABA under drought stress conditions, but it exhibited enhanced sensi- tivity to exogenous ABA. Scanning electron microscope and infrared thermal image analysis indicated an increase in the stomatal conductance in the gidl mutant under drought conditions. Interestingly, the gidl mutant had increased levels of chlorophyll and carbohydrates under submergence conditions, and showed enhanced reactive oxygen species （ROS）-scavenging ability and submergence tolerance compared with the wild-type. Further analyses suggested that the function of GID1 in submergence responses is partially dependent on ABA, and GA signaling by GID1 is involved in submergence tolerance by modulating carbohydrate consumption. Taken together, these findings suggest GID1 plays distinct roles in stomatal response and submergence tolerance through both the ABA and GA signaling pathways in rice.

关键词： abscisic acid carbohydrateconsumption gibberellic acid stomata Oryza sativa

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Exogenous Application of abscisic acid or Gibberellin acid Has Different Effects on Starch Granule Size Distribution in Grains of Wheat

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Journal of Integrative Agriculture 2013年第9期12卷 1551-1559页

作者： PENG Dian-liang CAI Tie YIN Yan-ping YANG Wei-bing NI Ying-li YANG Dong-qing WANG Zhen-lin National Key Laboratory of Crop Biology Shandong Agricultural University

Granule size distribution of wheat starch is an important characteristic that can affect its chemical composition and the functionality of wheat products. Two high-yield winter wheat cultivars were used to evaluate the effects of the application of exogenous ABA or GA during the reproductive phase of the initial grain filling on starch granule size distribution and starch components in grains at maturity. The results indicated that a bimodal curve was found in the volume and surface area distribution of grain starch granules, and a unimodal curve was observed for the number distribution under all treatments. The exogenous ABA resulted in a significant increase in the proportions （both by volume and by surface area） of B-type （〈9.9 Ixm in diameter） starch granules, with a reduction in those of A-type （〉9.9 ~tm） starch granules, while, the exogenous GA3 led to converse effects on size distribution of those starch granules. The exogenous ABA also increased starch, amylose and amylopectin contents at maturity but significantly reduced the ratio of amylose to amylopectin. Application of GA3 significantly reduced starch content, amylopectin content but increased the ratio of amylose to amylopectin. The ratio of amylose to amylopectin showed a significant and negative relationship with the volume proportion of granules 〈9.9 μm, but was positively related to the volume proportion of granules 22.8-42.8 μm.

关键词： abscisic acid gibberellin granule size distribution starch winter wheat (Triticum aestivum L.)

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The MIEL1-ABI5/MYB30 regulatory module fine tunes abscisic acid signaling during seed germination

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Journal of Integrative Plant Biology 2022年第4期64卷 930-941页

作者： Kaili Nie Hongyun Zhao Xiaopei Wang Yanli Niu Huapeng Zhou Yuan Zheng State Key Laboratory of Crop Stress Adaptation and Improvement Key Laboratory of Plant Stress BiologySchool of Life SciencesHenan UniversityKaifeng 475001China Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education College of Life SciencesSichuan UniversityChengdu 610064China

The transcription factor abscisic acid INSENSITIVE5(ABI5)plays a crucial role in abscisic acid(ABA)signaling during seed ***,how ABI5 is regulated during this process is poorly ***,we report that the ubiquitin E3 ligase MIEL1 and its target transcription factor MYB30 modulate ABA responses in Arabidopsis thaliana during seed germination and seedling establishment via the precise regulation of ***1 interacts with and ubiquitinates ABI5 to facilitate its degradation during *** transcription factor MYB30,whose turnover is mediated by MIEL1 during seed germination,also interacts with ABI5 to interfere with its transcriptional ***30 functions downstream of MIEL1 in the ABA response,and both are epistatic to ABI5 in ABA-mediated inhibition of seed germination and postgerminative *** treatment induces the degradation of MIEL1 and represses the interaction between MIEL1 and ABI5/MYB30,thus releasing both ABI5 and *** results demonstrate that MIEL1 directly mediates the proteasomal degradation of ABI5 and inhibits its activity via the release of its target protein MYB30,thus ensuring precise ABA signaling during seed germination and seedling establishment.

关键词： ABI5 abscisic acid MIEL1 MYB30 seed germination transcriptional regulation ubiquitination

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Activity, but not Expression, of Soluble and Cell Wall-Bound acid Invertases Is Induced by abscisic acid in Developing Apple Fruit

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Journal of Integrative Plant Biology 2006年第5期48卷 536-549页

作者： Qiu-Hong Pan Xiang-Chun Yu Na Zhang Xun Zou Chang-Cao Peng Xiu-Ling Wang Ke-Qin Zou Da-Peng Zhang China State Key Laboratory of Plant Physiology and Biochemistry China Agricultural University Beijing 100094 China

The present experiment, involving both the in vivo injection of abscislc acid （ABA） Into apple （Malus domestica Brohk.） fruits and the in vivo Incubation of fruit tissues in ABA-contalnlng medium, revealed that ABA activates both soluble and cell wall-bound acid invertases. Immunoblottlng and enzyme-linked Immunosorbent assays showed that this ABA-induced acid invertase activation is Independent of the amount of enzyme present. The acid Invertase activation induced by ABA is dependent on medium pH, time course, ABA dose, living tissue and developmental stage. Two isomers of cls-（＋）-ABA, （-）-ABA and trans- ABA, had no effect on acid invertases, showing that ABA-induced acid invertase activation is specific to physiologically active cis-（＋）ABA. Protein kinase inhlbltors K252a and H7 as well as acid phosphatase Increased the ABA-Induced effects. These data indicate that ABA specifically activates both soluble and cell wall-bound acid Invertases by a posttranslational mechanism probably Involving reversible protein phosphorylatlon, and this may be one of the mechanisms by which ABA Is Involved In regulating fruit development.

关键词： abscisic acid acid invertase apple fruit protein phosphorylation sucrose metabolism.

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Induction of Protection against Paraquat-induced Oxidative Damage by abscisic acid in Maize Leaves is Mediated through Mitogen-activated Protein Kinase

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Journal of Integrative Plant Biology 2009年第10期51卷 961-972页

作者： Hai-Dong Ding Xiao-Hua Zhang Shu-Cheng XU Li-Li Sun Ming-Yi Jiang A-Ying Zhang Yin-Gen Jin College of Life Sciences Nanjing Agricultural University Nanjing 210095 China College of Biosciences and Biotechnology Yangzhou University Yangzhou 225009 China College of Life Sciences Fuyang Teachers College Fuyang 236032 China National Key Laboratory of Crop Genetics and Germplasm Enhancement Nanjing Agricultural University Nanjing 210095 China

Mitogen-activated protein kinase （MAPK） cascade has been shown to be important components in stress signal transduction pathway. In the present study, protection of maize seedlings （Zea mays L.） against paraquat-generated oxidative toxicity by abscisic acid （ABA）, its association with MAPK and ZmMPK5, a candidate for MAPK were investigated. Treatment of maize leaves with exogenous ABA led to significant decreases in the content of malondialdehyde, the percentage of ion leakage and the level of protein oxidation （in terms of carbonyl groups） under paraquat （PQ） stress. However, such decreases were blocked by the pretreatment with two MAPK kinase inhibitors PD98059 and U0126. The damage caused by PQ was further aggravated by inhibitors. Two inhibitors also suppressed the total activities of the antioxidant enzymes superoxide dismutase （SOD, EC 1.***.1.1）, catalase （CAT, EC 1.***.1.6）, ascorbate peroxidase （APX, EC ***）, and glutathione reductase （GR, EC 1.***.4.2）. Besides, treatment with PQ stimulated the activation of a 46 kDa MAPK, which was identified as ZmMPK5 by in-gel kinase assay with immunoprecipitation. These results reveal that ABA-induced protection against PQ-generated oxidative damage is mediated through MAPK cascade in maize leaves, in which ZmMPK5, a candidate for MAPK, is demonstrated to be involved.

关键词： abscisic acid mitogen-activated protein kinase oxidative damage paraquat Zea mays

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In vitro Transient Expression System of Latex C-serum was used for Analysis of Hevein Promoter in Response to abscisic acid in Hevea brasiliensis

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Journal of Integrative Plant Biology 2008年第3期50卷 338-344页

作者： Xiao-Wen Fei Xiao-Dong Deng Institute of Tropical Bioscience and Biotechnology Chinese Agricultural Academy for Tropical Crops Haikou 571101 China Department of Biochemistry Hainan Medical College Haikou 571101 China

Hevein has been found to be an essential element in coagulation of rubber particles in latex of rubber trees. In a previous study, we cloned a 1 241-bp fragment of a 5＇ upstream region of the hevein gene by genome walking. This fragment was analyzed by a 5＇ end nested deletion method in the present study, fused with a uidA （gus） gene to produce a series of tested constructs, which were transferred into C-serum of latex and the Gus activities were detected. Results showed that the fragment from -749 to -292 was sufficient for expression of gus gene in latex, and the fragment from -292 to -168 was crucial in response to abscisic acid inducement. In a transient transgenic test of rubber leaf with particle bombardment, construct Hev749 conferred gus-specific expression in veins, in which the latex tubes mainly distributed. This implies that the fragment from -749 to -292 was laticiferous-specific.

关键词： abscisic acid gus (beta-glucuronidase) gene hevein promoter rubber tree (Hevea brasiliensis)

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Integrin-like Protein Is Involved in the Osmotic Stressinduced abscisic acid Biosynthesis in Arabidopsis thaliana

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Journal of Integrative Plant Biology 2007年第4期49卷 540-549页

作者： Bing Lv Feng Chen Zhong-Hua Gong Hong Xie Jian-Sheng Liang Laboratory of Plant Growth and Development & Proteomics College of Bioscience and Biotechnology Yangzhou University Yangzhou 225009 China

We studied the perception of plant cells to osmotic stress that leads to the accumulation of abscisic acid （ABA） in stressed Arabidopsis thaliana L. cells. A significant difference was found between protoplasts and cells in terms of their responses to osmotic stress and ABA biosynthesis, implying that cell wall and/or cell wall-plasma membrane interaction are essential in identifying osmotic stress. Western blotting and immunofluorescence localization experiments, using polyclonal antibody against human integrin β1, revealed the existence of a protein similar to the integrin protein of animals in the suspension-cultured cells located in the plasma membrane fraction. Treatment with a synthetic pentapeptide, Gly-Arg-Gly-Asp-Ser （GRGDS）, which contains an RGD domain and interacts specifically with integrin protein and thus blocks the cell wall-plasma membrane interaction, significantly inhibited osmotic stress-induced ABA biosynthesis in cells, but not in protoplasts. These results demonstrate that cell wall and/or cell wall-plasma membrane interaction mediated by integrin-Iike proteins played important roles in osmotic stress-induced ABA biosynthesis in Arabidopsis thaliana.

关键词： abscisic acid Arabidopsis thaliana cell wall-plasma membrane interaction integrin-like protein osmotic stress.

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