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New insight into Ca^(2+)-permeable channel in plant immunity

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Journal of Integrative plant Biology 2024年第3期66卷 623-631页

作者： Wei Wang Hang-Yuan Cheng Jian-Min Zhou State Key Laboratory of plant Genomics Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China CAS Center for Excellence in Biotic Interactions University of Chinese Academy of SciencesBeijing 100049China College of Advanced Agricultural Sciences University of Chinese Academy of SciencesBeijing 100049China Hainan Yazhou Bay Seed Laboratory Sanya 572025China

Calcium ions(Ca^(2+)) are crucial intracellular second messengers in eukaryotic cells. Upon pathogen perception, plants generate a transient and rapid increase in cytoplasmic Ca^(2+)levels, which is subsequently decoded by Ca^(2+)sensors and effectors to activate downstream immune responses. The elevation of cytosolic Ca^(2+)is commonly attributed to Ca^(2+)influx mediated by plasma membranelocalized Ca^(2+)–permeable channels. However, the contribution of Ca^(2+)release triggered by intracellular Ca^(2+)-permeable channels in shaping Ca^(2+)signaling associated with plant immunity remains poorly understood. This review discusses recent advances in understanding the mechanism underlying the shaping of Ca^(2+)signatures upon the activation of immune receptors, with particular emphasis on the identification of intracellular immune receptors as non-canonical Ca^(2+)-permeable channels. We also discuss the involvement of Ca^(2+)release from the endoplasmic reticulum in generating Ca^(2+)signaling during plant immunity.

关键词： Ca^(2+)-permeable channels endoplasmic reticulum phosphorylation plant immunity resistosome

Recent advances in plant immunity with cell death:A review

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Journal of Integrative Agriculture 2022年第3期21卷 610-620页

作者： YIN Jun-jie XIONG Jun XU Li-ting CHEN Xue-wei LI Wei-tao State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China Rice Research InstituteSichuan Agricultural University at WenjiangChengdu 611130P.R.China

Cell death is an important physiological phenomenon in *** can be programmed or *** cell death is usually induced by abiotic or biotic *** studies have shown that many proteins regulate both cell death and immunity in ***,we provide a review on the advances in plant immunity with cell death,especially the molecular regulation and underlying mechanisms of those proteins involved in both cell death and plant *** addition,we discuss potential approaches toward improving plant immunity without compromising plant growth.

关键词： cell death unprogrammed cell death programmed cell death hypersensitive response reactive oxygen species plant immunity resistance

ORYZA SATIVA SPOTTED-LEAF 41(OsSPL41) Negatively Regulates plant immunity in Rice

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Rice science 2023年第5期30卷 426-436,I0017-I0020页

作者： TAN Jingyi ZHANG Xiaobo SHANG Huihui LI Panpan WANG Zhonghao LIAO Xinwei XU Xia YANG Shihua GONG Junyi WU Jianli State Key Laboratory of Rice Biology and Breeding China National Rice Research InstituteHangzhou 310006China

Identification of immunity-associated leucine-rich repeat receptor-like protein kinases(LRR-RLK) is critical to elucidate the LRR-RLK mediated mechanism of plant ***,we reported the map-based cloning of a novel rice SPOTTED-LEAF 41(Os SPL41) encoding a putative LRR-RLK protein(Os LRR-RLK41/Os SPL41) that regulated disease responses to the bacterial blight pathogen Xanthomonas oryzae ***(Xoo).An 8-bp insertion at position 865 bp in a mutant spotted-leaf 41(spl41) allele led to the formation of purple-brown lesions on *** complementation by the wild type allele(Os SPL41) can rescue the mutant phenotype,and the complementary lines showed similar performance to wild type in a number of agronomic,physiological and molecular *** SPL41 was constitutively expressed in all tissues tested,and Os SPL41 contains a typical transmembrane domain critical for its localization to the cell *** mutant exhibited an enhanced level of resistance to Xoo in companion of markedly up-regulated expression of pathogenesis-related genes such as Os PR10a,Os PAL1 and Os NPR1,while the level of salicylic acid was significantly increased in *** contrast,the over-expression lines exhibited a reduced level of H_(2)O_(2) and were much susceptible to Xoo with down-regulated expression of pathogenesis-related *** results suggested that Os SPL41 might negatively regulate plant immunity through the salicylic acid signaling pathway in rice.

关键词： bacterial blight leucine-rich repeat receptor-like protein kinase plant immunity reactive oxygen species rice spotted leaf

A Meloidogyne incognita effector Minc03329 suppresses plant immunity and promotes parasitism

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Journal of Integrative Agriculture 2023年第3期22卷 799-811页

作者： ZHOU Jing-jing ZHANG Xiao-ping LIU Rui LING Jian LI Yan YANG Yu-hong XIE Bing-yan ZHAO Jian-long MAO Zhen-chuan State Key Laboratory of Vegetable Biobreeding Institute of Vegetables and FlowersChinese Academy of Agricultural SciencesBeijing 100081P.R.China

Meloidogyne incognita is a devastating plant-parasitic *** play important roles during the stages of nematodes infection and parasitism,but their molecular functions remain largely *** this study,we characterized a new effector,Minc03329,which contains signal peptide for secretion and a C-type lectin *** yeast signal sequence trap experiments indicated that the signal peptide of Minc03329 is *** situ hybridization showed that Minc03329 was specifically expressed in the subventral esophageal ***-time qPCR confirmed that the expression level of Minc03329 transcript was significantly increased in pre-parasitic and parasitic second-stage juveniles(pre-J2s and par-J2s).Tobacco rattle virus(TRV)-mediated gene silencing of Minc03329 in host plants largely reduced the pathogenicity of *** the contrary,ectopic expression of Minc03329 in Arabidopsis thaliana significantly increased plant susceptibility to *** expression of Minc03329 in Nicotiana benthamiana leaves suppressed the programmed cell death triggered by the pro-apoptotic protein ***,the transcriptome analysis of Minc03329-transgenic Arabidopsis and wild type revealed that many defense-related genes were significantly ***,some different expressed genes were involved in the formation of nematode feeding *** results revealed that Minc03329 is an important effector for ***,suppressing host defense response and promoting pathogenicity.

关键词： Meloidogyne incognita effector C-type lectin pathogenicity plant immunity

plant immunity inducers:from discovery to agricultural application

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Stress Biology 2022年第1期2卷 634-646页

作者： Bo Yang Sen Yang Wenyue Zheng Yuanchao Wang Department of plant Pathology Nanjing Agricultural UniversityNanjing 210095China The Key Laboratory of plant immunity Nanjing Agricultural UniversityNanjing 210095China

While conventional chemical fungicides directly eliminate pathogens,plant immunity inducers activate or prime plant *** recent years,considerable progress has been made in understanding the mechanisms of immune regulation in *** development and application of plant immunity inducers based on the principles of plant immunity represent a new field in plant protection *** this review,we describe the mechanisms of plant immunity inducers in terms of plant immune system activation,summarize the various classes of reported plant immunity inducers(proteins,oligosaccharides,chemicals,and lipids),and review methods for the identification or synthesis of plant immunity *** current situation,new strategies,and future prospects in the development and application of plant immunity inducers are also discussed.

关键词： plant immunity inducer plant immunity Biopesticide Agricultural applications

Epigenetic regulation of plant immunity:from chromatin codes to plant disease resistance

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aBIOTECH 2023年第2期4卷 124-139页

作者： Si-Si Xie Cheng-Guo Duan Shanghai Center for plant Stress Biology and CAS Center for Excellence in Molecular plant Sciences Chinese Academy of SciencesShanghai 200032China University of the Chinese Academy of Sciences Beijing 100049China

Facing a deteriorating natural environment and an increasing serious food crisis,bioengineering-based breeding is increasing in *** defend against pathogen infection,plants have evolved multiple defense mechanisms,including pathogen-associated molecular pattern(PAMP)-triggered immunity(PTI)and effector-triggered immunity(ETI).A complex regulatory network acts downstream of these PTI and ETI pathways,including hormone signal transduction and transcriptional *** recent years,increasing lines of evidence show that epigenetic factors act,as key regulators involved in the transcriptional reprogramming,to modulate plant immune ***,we summarize current progress on the regulatory mechanism of DNA methylation and histone modifications in plant defense *** addition,we also discuss the application of epigenetic mechanism-based resistance strategies in plant disease breeding.

关键词： Histone modification DNA methylation Transcriptional reprogramming plant immunity Disease resistance

Overlapping functions of YDA and MAPKKK3/MAPKKK5 upstream of MPK3/MPK6 in plant immunity and growth/development

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Journal of Integrative plant Biology 2022年第8期64卷 1531-1542页

作者： Yidong Liu Emma Leary Obai Saffaf RFrank Baker Shuqun Zhang Division of Biochemistry University of MissouriColumbiaMO 65211USA Division of Biological Sciences University of MissouriColumbiaMO 65211USA Advanced Light Microscopy Core University of MissouriColumbiaMO 65211USA

Arabidopsis MITOGEN-ACTIVATED PROTEIN KINASE3(MAPK3 or MPK3)and MPK6 play important signaling roles in plant immunity and growth/*** KINASE4(MKK4)and MKK5 function redundantly upstream of MPK3 and MPK6 in these ***(YDA),also known as MAPK KINASE KINASE4(MAPKKK4),is upstream of MKK4/MKK5 and forms a complete MAPK cascade(YDA–MKK4/MKK5–MPK3/MPK6)in regulating plant growth and *** plant immunity,MAPKKK3 and MAPKKK5 function redundantly upstream of the same MKK4/MKK5–MPK3/MPK6 ***,the residual activation of MPK3/MPK6 in the mapkkk3 mapkkk5 double mutant in response to flg22 pathogen-associated molecular pattern(PAMP)treatment suggests the presence of additional MAPKKK(s)in this MAPK cascade in signaling plant *** investigate whether YDA is also involved in plant immunity,we attempted to generate mapkkk3 mapkkk5 yda triple ***,it was not possible to recover one of the double mutant combinations(mapkkk5 yda)or the triple mutant(mapkkk3 mapkkk5 yda)due to a failure of *** the clustered regularly interspaced short palindromic repeats(CRISPR)–CRISPRassociated protein 9(Cas9)approach,we generated weak,N-terminal deletion alleles of YDA,yda-del,in a mapkkk3 mapkkk5 ***-triggered MPK3/MPK6 activation was further reduced in the mapkkk3 mapkkk5 yda-del mutant,and the triple mutant was more susceptible to pathogen infection,suggesting YDA also plays an important role in plant immune *** addition,MAPKKK5 and,to a lesser extent,MAPKKK3 were found to contribute to gamete function and embryogenesis,together with *** the double homozygous mapkkk3 yda mutant showed the same growth and development defects as the yda single mutant,mapkkk5 yda double mutant and mapkkk3 mapkkk5 yda triple mutants were embryo lethal,similar to the mpk3 mpk6 double *** results demonstrate that YDA,MAPKKK3,and MAPKKK5 have overlapping functions upstream of the MKK4/MKK5–MPK3/MPK6 module in bot

关键词： embryogenesis gamete transmission MAPK cascade MPK3/MPK6 MAPKKK3/MAPKKK5 plant immunity YDA

RALF22 promotes plant immunity and amplifies the Pep3 immune signal

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Journal of Integrative plant Biology 2023年第11期65卷 2519-2534页

作者： Yu-Han He Song-Yu Chen Xing-Yan Chen You-Ping Xu Yan Liang Xin-Zhong Cai Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province Institute of BiotechnologyCollege of Agriculture and BiotechnologyZhejiang University866 Yu Hang Tang RoadHangzhou 310058China Centre of Analysis and Measurement Zhejiang University866 Yu Hang Tang RoadHangzhou 310058China Hainan Institute Zhejiang UniversitySanya 572025China

Rapid alkalinization factors(RALFs)in plants have been reported to dampen pathogenassociated molecular pattern(PAMP)-triggered immunity via suppressing PAMP-induced complex formation between the pattern recognition receptor(PRR)and its co-receptor ***,the direct and positive role of RALFs in plant immunity remains largely ***,we report the direct and positive roles of a typical RALF,RALF22,in plant ***22alone directly elicited a variety of typical immune responses and triggered resistance against the devastating necrotrophic fungal pathogen Sclerotinia sclerotiorum in a FERONIA(FER)-dependent ***(LRE)-like glycosylphosphatidylinositol(GPI)-anchored protein 1(LLG1)and NADPH oxidase RBOHD were required for RALF22-elicited reactive oxygen species(ROS)*** mutation of cysteines conserved in the C terminus of RALFs abolished,while the constitutive formation of two disulfide bridges between these cysteines promoted the RALF22-elicited ROS production and resistance against ***,demonstrating the requirement of these cysteines in the functions of RALF22 in plant ***,RALF22 amplified the Pep3-induced immune signal by dramatically increasing the abundance of PROPEP3 transcript and *** with RALF22 induced resistance against *** in Brassica crop ***,our results reveal that RALF22 triggers immune responses and augments the Pep3-induced immune signal in a FER-dependent manner,and exhibits the potential to be exploited as an immune elicitor in crop protection.

关键词： RALF22 FER reactive oxygen species Pep3 plant immunity Sclerotinia sclerotiorum

UBP12/UBP13-mediated deubiquitination of salicylic acid receptor NPR3 suppresses plant immunity

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Molecular plant 2023年第1期16卷 232-244页

作者： Yu Zhou Su-Hyun Park Nam-Hai Chua Temasek Life Sciences Laboratory National University of Singapore1 Research LinkSingapore 117604Singapore Disruptive&Sustainable Technologies for Agricultural Precision Singapore-MIT Alliance for Research and Technology1 CREATE WaySingapore 138602Singapore

Salicylic acid(SA),a defense hormone produced after pathogen challenge,is critical for plant *** NONEXPRESSER OF PR GENES 1(NPR1)and its paralogs NPR3 and NPR4 can bind SA and mediate SA signal ***1 functions as a transcriptional co-activator to promote defense gene expression,whereas NPR3 and NPR4 have been shown to function as negative regulators in the SA signaling *** the mechanism about NPR1 regulation has been well studied,how NPR3/NPR4 proteins are regulated in immune responses remains largely ***,we show that the stability of NPR3/NPR4 is enhanced by *** the absence of pathogen challenge,NPR3/NPR4 are unstable and degraded by the 26S proteasome,whereas the increase in cellular SA levels upon pathogen infection suppresses NPR3/NPR4 *** found that UBP12 and UBP13,two homologous deubiquitinases from a ubiquitin-specific protease subfamily,negatively regulate plant immunity by promoting NPR3/NPR4 *** genetic results further showed that UBP12/UBP13-mediated immunity suppression is partially dependent on NPR3/NPR4 *** interacting with NPR3 in the nucleus in an SA-dependent manner,UBP12 and UBP13 remove ubiquitin from polyubiquitinated NPR3 to protect it from being *** stabilization of NPR3/NPR4 promoted by UBP12/UBP13 is essential for negative regulation of basal and SA-induced immunity.

关键词： plant immunity salicylic acid NPR3 UBP12/UBP13