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The Xanthomonas typeⅢeffector Xop AP prevents stomatal closure by interfering with vacuolar acidification

Journal of Integrative Plant Biology 2022年第10期64卷 1994-2008页

作者： Longyu Liu Ying Li Zhengyin Xu Huan Chen Jingyi Zhang Brittany Manion Fengquan Liu Lifang Zou Zheng Qing Fu Gongyou Chen State Key Laboratory of Microbial Metabolism/Shanghai Collaborative Innovation Center of Agri‐Seeds School of Agriculture and BiologyShanghai Jiao Tong UniversityShanghai 200240China Department of Biological Sciences University of South CarolinaColumbia 29208USA Institute of Plant Protection Jiangsu Academy of Agricultural SciencesNanjing 210014China

Plant stomata close rapidly in response to a rise in the plant hormone abscisic acid(ABA)or salicylic acid(SA)and after recognition of pathogenassociated molecular patterns(PAMPs).stomatal closure is the result of vacuolar convolution,ion efflux,and changes in turgor pressure in guard *** bacteria secrete typeⅢeffectors(T3Es)that interfere with plant defense mechanisms,causing severe plant disease ***,we show that the virulence and infection of Xanthomonas oryzae ***(Xoc),which is the causal agent of rice bacterial leaf streak disease,drastically increased in transgenic rice(Oryza sativa L.)plants overexpressing the Xoc T3E gene Xop AP,which encodes a protein annotated as a *** discovered that Xop AP binds to phosphatidylinositol 3,5-bisphosphate(Ptd Ins(3,5)P_(2)),a memb rane phospholipid that functions in p H control in lysosomes,membrane dynamics,and protein *** AP inhibited the acidification of vacuoles by competing with vacuolar H^(+)-pyrophosphatase(V-PPase)for binding to Ptd Ins(3,5)P_(2),leading to stomatal *** rice overexpressing Xop AP also showed inhibition of stomatal closure when challenged by Xoc infection and treatment with the PAMP ***,Xop AP suppressed flg22-induced gene expression,reactive oxygen species burst and callose deposition in host plants,demonstrating that Xop AP subverts PAMP-triggered immunity during Xoc *** together,these findings demonstrate that Xop AP overcomes stomatal immunity in plants by binding to lipids.

关键词： Ptd Ins(3 5)P2 stomatal closure typeⅢeffector vacuole acidification Xanthomonas Xop AP

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Rice stomatal closure Requires Guard Cell Plasma Membrane ATP-Binding Cassette Transporter RCN1/OsABCG5

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Molecular Plant 2016年第3期9卷 417-427页

作者： Shuichi Matsuda Sho Takano Moeko Sato Kaoru Furukawa Hidetaka Nagasawa Shoko Yoshikawa Jun Kasuga Yoshihiko Tokuji Kazufumi Yazaki Mikio Nakazono Itsuro Takamure Kiyoaki Kato Department of Agro-environmental Science Obihiro University of Agricultural and Veterinary Medicine 2-11 Nishi Inada Obihiro Hokkaido 080-0834 Japan Department of Food Science Obihiro University of Agricultural and Veterinary Medicine 2-11 Nishi Inada Obihiro Hokkaido 080-0834 Japan Research Institute for Sustainable Humanosphere Kyoto University Gokasho Uji Kyoto 611-0011 Japan Graduate School of Bioagricultural Sciences Nagoya University Furo-cho Chikusa Nagoya Aichi 464-8601 Japan Graduate School of Agriculture Hokkaido University Kita 9 Nishi 9 Kita-ku Sapporo Hokkaido 060-8589 Japan

Water stress is one of the major environmental stresses that affect agricultural production worldwide. Water loss from plants occurs primarily through stomatal pores. Here, we report that an Oryza sativa half-size ATP-binding cassette （ABC） subfamily G protein, RCN 1/OsABCG5, is involved in stomatal closure mediated by phytohormone abscisic acid （ABA） accumulation in guard cells. We found that the GFP-RCN1/ OsABCG5-fusion protein was localized at the plasma membrane in guard cells. The percentage of guard cell pairs containing both ABA and GFP-RCN1/OsABCG5 increased after exogenous ABA treatment, whereas they were co-localized in guard cell pairs regardless of whether exogenous ABA was applied. ABA application resulted in a smaller increase in the percentage of guard cell pairs containing ABA in rcnl mutant （A684P） and RCN1-RNAi than in wild-type plants. Furthermore, polyethylene glycol （drought stress）-inducible ABA accumulation in guard cells did not occur in rcnl mutants. Stomata closure mediated by exogenous ABA application was strongly reduced in rcnl mutants. Finally, rcnl mutant plants had more rapid water loss from detached leaves than the wild-type plants. These results indicate that in response to drought stress, RCN1/OsABCG5 is involved in accumulation of ABA in guard cells, which is indispensable for stomatal closure.

关键词： stomatal closure abscisic acid ABC transporter rice drought stress

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Ethylene-induced stomatal closure is mediated via MKK1/3–MPK3/6 cascade to EIN2 and EIN3

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Journal of Integrative Plant Biology 2021年第7期63卷 1324-1340页

作者： Teng-Yue Zhang Zhong-Qi Li Yu-Dong Zhao Wen-Jie Shen Meng-Shu Chen Hai-Quan Gao Xiao-Min Ge Hui-Qin Wang Xue Li Jun-Min He School of Life Sciences Shaanxi Normal UniversityXi'an710119 China

Mitogen-activated protein kinases(MPKs)play essential roles in guard cell signaling,but whether MPK cascades participate in guard cell ethylene signaling and interact with hydrogen peroxide(H2O2),nitric oxide(NO),and ethylene-signaling components remain ***,we report that ethylene activated MPK3 and MPK6 in the leaves of wild-type Arabidopsis thaliana as well as ethylene insensitive2(ein2),ein3,nitrate reductase1(nia1),and nia2 mutants,but this effect was impaired in ethylene response1(etr1),nicotinamide adenine dinucleotide phosphate oxidase AtrbohF,mpk kinase1(mkk1),and mkk3 *** contrast,the constitutive triple response1(ctr1)mutant had constitutively active MPK3 and *** two-hybrid,bimolecular fluorescence complementation,and pull-down assays indicated that MPK3 and MPK6 physically interacted with MKK1,MKK3,and the C-terminal region of EIN2(EIN2 CEND).mkk1,mkk3,mpk3,and mpk6 mutants had typical levels of ethylene-induced H2O2 generation but impaired ethylene-induced EIN2 CEND cleavage and nuclear translocation,EIN3 protein accumulation,NO production in guard cells,and stomatal *** results show that the MKK1/3–MPK3/6 cascade mediates ethylene-induced stomatal closure by functioning downstream of ETR1,CTR1,and H2O2 to interact with EIN2,thereby promoting EIN3 accumulation and EIN3-dependent NO production in guard cells.

关键词： Arabidopsis thaliana EIN3 ethylene ETHYLENE IN-SENSITIVE2 hydrogen peroxide mitogen-activated protein kinase cascade nitric oxide stomatal closure

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Hydrogen Sulfide May Function Downstream of Nitric Oxide in Ethylene-Induced stomatal closure in Vicia faba L.

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Journal of Integrative Agriculture 2012年第10期11卷 1644-1653页

作者： LIU Jing HOU Zhi-hui LIU Guo-hua HOU Li-xia LIU Xin Key Laboratory of Plant Biotechnology in Universities of Shandong Province/College of Life Science Qingdao Agricultural University

Pharmacological, laser scanning confocal microscopic （LSCM）, and spectrophotographic approaches were used to study the roles of hydrogen sulfide （H2S） and nitric oxide （NO） in signaling transduction of stomatal movement in response to ethylene in Viciafaba L. Ethylene treatment resulted in the dose-dependent stomatal closure under light, and this effect was blocked by the inhibitors of H2S biosynthesis in V. faba L. Additionally, ethylene induces H2S generation and increases L-/D-cysteine desulfhydrase （pyridoxalphosphate-dependent enzyme） activity in leaves of V. faba L. Inhibitors of H2S biosynthesis have no effect on the ethylene-induced stomatal closure, NO accumulation, and nitrate reductase （NR） activity in guard cells or leaves of II. faba L. Moreover, the ethylene-induced increase of H2S levels and L-/D- cysteine desulfhydrase activity declined when NO generation was inhibited. Therefore, we conclude that H2S and NO probably are involved in the signal transduction pathway of ethylene-induced stomatal closure. H2S may represent a novel component downstream of NO in the ethylene-induced stomatal movement in V. faba L.

关键词： hydrogen sulfide nitric oxide ethylene stomatal closure Vicia faba L.

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Nitric oxide induced by hydrogen peroxide mediates ethylene-induced stomatal closure of Arabidopsis thaliana

Nitric oxide induced by hydrogen peroxide mediates ethylene-...

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2009中国植物学会植物细胞生物学学术年会

作者： Guo-hua Liu~1,Li-xia Hou~1,Jing Liu~1,Xue-chen Wang~2,Xin Liu~(1,2*) 1 Department of Life Science,Qingdao Agriculture University,Changcheng Road 700#, Qingdao 266109,P.R.China 2 State Key Laboratory of Plant Physiology and Biochemistry,College of Biological Sciences,China Agricultural University,Yuanming Yuan West Road 2#,Beijing 100094, P.R.China

stomatal movement is regulated by a complex network of signaling events involving numerous intermediates,among them hydrogen peroxide(HO)and nitric oxide(NO). Here,the sources of NO production,the role of NO and HO du... 详细信息

关键词： Arabidopsis thaliana nitric oxide hydrogen peroxide ethylene stomatal closure

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Hydrogen sulfide may function downstream of nitric oxide in ethylene-induced stomatal closure in Vicia faba L

Hydrogen sulfide may function downstream of nitric oxide in ...

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第二届植物代谢国际会议

作者： LIU Xin HOU Zhi-hui HOU Li-xia Wang Lan-xiang School of Life Sciences Qingdao Agricultura University Qingdao 266109 China

＜正＞Pharmacological,Laser scanning confocal microscopic （LSCM）,and spectrophotographic approaches were used to study the roles of hydrogen sulfide （H2S） and nitric oxide （NO） in signaling transduction of

关键词： hydrogen sulfide nitric oxide ethylene stomatal closure Vicia faba L.

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Heterotrimeric G protein mediates ethylene-induced stomatal closure via H2O2 production,and acts downstream of ETR1,EIN4 and RANl and upstream of EIN2,EIN3 and ARR2

Heterotrimeric G protein mediates ethylene-induced stomatal ...

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2013全国植物生物学大会

作者： LEI Xue MA Xiange HE Junmin School of Life Sciences Shaanxi Normal University

Heterotrimeric G proteins have been shown to function as key players in hydrogen peroxide(HO) production in plant cells,and ethylene is known to induce stomatal closure via HO generation,but whether G proteins mediate ethylene-induced HO production in guard cells and subsequent stomatal closure are not ***,genetic and physiological data are provided that position GPA1,the Got-subunit of heterotrimeric G proteins,into the Arabidopsis guard cell ethylene-signalling network,and demonstrate Gαas a missing link between ethylene and *** wild-type leaves,ethylene-induced HO production in guard cells and stomatal closure were dependent on activation of Gα.gpal mutants were insensitive to ethylene stimulation of stomatal closure and HO production,whereas wGαand cGαoverexpression lines showed faster stomatal closure and HO production in response to ***, exogenous HO rescued the defect of gpal mutants in ethylene-induced stomatal *** mutants for ethylene receptors ETR1 and EIN4 as well as the copper transporter RAN1 were insensitive to ethylene in terms of stomatal closure and HO production,but which could be rescued by exogenous Gαactivator or *** of the ethylene signalling mutants for EIN2, EIN3 and ARR2 did not close in response to ethylene,Gαactivator or HO,but do generate HO following challenge of either ethylene or Gα*** together,our results strongly support the idea that Gαprotein mediates ethylene-induced stomatal closure via modulating HO production,and acts downstream of ETR1,EIN4 and RAN1 and upstream of EIN2,EIN3 and ARR2.

关键词： heterotrimeric G protein ethylene stomatal closure H2O2 Gαsubunit guard cell ethylene receptor signalling Arabidopsis thaliana

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Hydrogen Sulfide Positively Regulates Abscisic Acid Signaling through Persulf idation of SnRK2.6 in Guard Cells

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Molecular Plant 2020年第5期13卷 732-744页

作者： Sisi Chen Honglei Jia Xiaofeng Wang Cong Shi Xiao Wang Peiyun Ma Juan Wang Meijuan Ren Jisheng Li Biomass Energy Center for Arid and Semi-arid Lands College of Life SciencesNorthwest A&F UniversityYanglingShaanxi 712100China School of Environmental Science and Engineering Shaanxi University of Science&TechnologyXi'anShaanxi 710021China

The phytohormone abscisic acid(ABA)plays pivotal roles in triggering stomatal closure and facilitating adaptation of plants to drought *** sulfide(H2S),a small signaling gas molecule,is involved in ABA-dependent stomatal ***,how H2S regulates ABA signaling remains largely ***,we show that ABA induces the production of H2S catalyzed by L-CYSTEINE DESULFHYDRASE1(DES1)in guard cells,and H2S in turn positively regulates ABA signaling through persulfidation of Open Stomata 1(OST1)/SNF1-RELATED PROTEIN KINASE2.6(SnRK2.6).Two cysteine(Cys)sites,Cys131 and Cys137,which are exposed on the surface of SnRK2.6 and close to the activation loop,were identified to be persulfidated,which promotes the activity of SnRK2.6 and its interaction with ABA response element-binding factor 2(ABF2),a transcription factor acting downstream of ABA *** Cys131,Cys137,or both residues in SnRK2.6 were substituted with serine(S),H2S_induced SnRK2_6 activity and SnRK2.6-ABF2 interaction were partially(SnRK2.6c131s and SnRK2.6c137S)or completely(SnRK2.6c131sc137S)*** of SnRK2.6c131s,SnRK2.6c137S,or SnRK2.6c131sc137S into the ost1-3 mutant could not rescue the mutant phenotype:less sensitivity to ABA-and H2S-induced stomatal closure and Ca2+influx as well as increased water loss and decreased drought *** together,our study reveals a novel post-translational regulatory mechanism of ABA signaling whereby H2S persulfidates SnRK2.6 to promote ABA signaling and ABA-induced stomatal closure.

关键词： H2S ABA persulfidation Ca^2+ stomatal closure drought

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