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| 1 | Two VOZ transcription factors link an E3 ligase and an NLR immune receptor to modulate immunity in rice显示文摘Nucleotide-binding leucine-rich repeat(NLR)proteins play critical roles in plant immunity.However,how NLRs are regulated and activate defense signaling is not fully understood.The rice(Oryza sativa)NLR receptor Piz-t confers broad-spectrum resistance to the fungal pathogen Magnaporthe oryzae and the RING-type E3 ligase AVRPIZ-T INTERACTING PROTEIN 10(APIP10)negatively regulates Piz-t accumulation.In this study,we found that APIP10 interacts with two rice transcription factors,VASCULAR PLANT ONEZINC FINGER 1(OsVOZ1)and OsVOZ2,and promotes their degradation through the 26S proteasome pathway.OsVOZ1 displays transcriptional repression activity while OsVOZ2 confers transcriptional activation activity in planta.The osvoz1 and osvoz2 single mutants display modest but opposite M.oryzae resistance in the non-Piz-t background.However,the osvoz1 osvoz2 double mutant exhibits strong dwarfism and cell death,and silencing of both genes via RNA interference also leads to dwarfism,mild cell death,and enhanced resistance to M.oryzae in the non-Piz-t background.Both OsVOZ1 and OsVOZ2 interact with Piz-t.Double silencing of OsVOZ1 and OsVOZ2 in the Piz-t background decreases Piz-t protein accumulation and transcription,reactive oxygen species-dependent cell death,and resistance to M.oryzae containing AvrPiz-t.Taken together,these results indicate that OsVOZ1 and OsVOZ2 negatively regulate basal defense but contribute positively to Piz-t-mediated immunity. | Jiyang Wang Ruyi Wang Hong Fang Chongyang Zhang Fan Zhang Zeyun Hao Xiaoman You Xuetao Shi Chan Ho Park Kangyu Hua Feng He Maria Bellizzi Kieu Thi Xuan Vo Jong-Seong Jeon Yuese Ning Guo-Liang Wang | 2021 | Molecular Plant2021，14，2： | 8 |
| 2 | 桃TGA家族鉴定及BABA诱导的抗病表达分析显示文摘以高度保守的BRLZ(PF07716)和DOG1(PF14144)结构域为种子序列,通过生物信息分析共鉴定得到15个桃TGA(TGACG motif-binding factor)家族基因,这些基因分布于桃的4条染色体上,其编码蛋白大小介于333~546 aa,分子量介于37.07~61.47 kD,等电点介于6.01~8.59,均定位于细胞核上。根据系统进化关系,拟南芥、大豆、番茄、水稻和桃的TGA家族分为5个亚族,其中桃TGA家族成员主要分布于第Ⅰ、Ⅱ和Ⅳ亚族。对桃TGA家族成员启动子区域的顺式调控元件进行预测分析,其启动子区含有至少1个激素或逆境胁迫响应元件。经RNA-seq数据分析可知,β–氨基丁酸(β-aminobutyric acid,BABA)处理和匍枝根霉(Rhizopus stolonifer)侵染能诱导桃TGA成员表达,其中PpTGA1-1在处理后12h内上调最为显著;显著表达的Pp TGA1-1通过与PpNPR1蛋白相互作用赋予PpNPR1蛋白DNA结合功能,启动一系列病程相关(pathogenesis-related,PR)基因的表达,从而诱导果实敏化(priming)抗性。桃TGA家族成员(尤其PpTGA1-1)可直接响应激发子诱导和病原菌侵染,并通过修饰PpNPR1蛋白从而在防卫反应中发挥重要调控作用。 | 黎春红 汪开拓 雷长毅 许凤 季娜娜 蒋永波 | 2022 | 园艺学报2022，49，2： | 1 |
| 3 | 水稻泛素连接酶D3与抗病相关蛋白VOZ2的互作分析显示文摘多蘖矮秆基因dwarf-3(D3)是水稻独脚金内酯信号转导过程中的重要节点基因,拟南芥中的MAX2基因与D3同源,且MAX2参与拟南芥的抗病防卫反应。本研究以水稻泛素连接酶D3为诱饵进行酵母双杂筛库,发现水稻抗病相关蛋白维管植物单锌指蛋白VOZ2与D3存在潜在的相互作用。通过酵母双杂交试验证实,D3与VOZ2存在互作。通过荧光定量PCR证实,接种水稻白叶枯病菌后,VOZ2基因在转录水平上的表达受到显著诱导。利用水稻原生质体开展的亚细胞共定位实验发现,D3与VOZ2共定位于细胞核。双分子荧光互补实验发现,D3与VOZ2在烟草叶肉细胞的细胞核和细胞质均产生较强的荧光,进一步证实了D3与VOZ2的相互作用。研究结果为进一步探究D3和VOZ2在水稻抗病防卫反应中的功能与分子机理奠定了基础。 | 罗英杰 崔维军 王忠华 吴月燕 林宏友 周洁 严成其 王栩鸣 | 2024 | 浙江农业学报2024，36，1： | 0 |
| 4 | BABA-induced pathogen resistance: a multi-omics analysis of the tomato response reveals a hyper-receptive status involving ethylene显示文摘Prior exposure to microbial-associated molecular patterns or specific chemical compounds can promote plants into a primed state with stronger defence responses.β-aminobutyric acid(BABA)is an endogenous stress metabolite that induces resistance protecting various plants towards diverse stresses.In this study,by integrating BABA-induced changes in selected metabolites with transcriptome and proteome data,we generated a global map of the molecular processes operating in BABA-induced resistance(BABA-IR)in tomato.BABA significantly restricts the growth of the pathogens Oidium neolycopersici and Phytophthora parasitica but not Botrytis cinerea.A cluster analysis of the upregulated processes showed that BABA acts mainly as a stress factor in tomato.The main factor distinguishing BABA-IR from other stress conditions was the extensive induction of signaling and perception machinery playing a key role in effective resistance against pathogens.Interestingly,the signalling processes and immune response activated during BABA-IR in tomato differed from those in Arabidopsis with substantial enrichment of genes associated with jasmonic acid(JA)and ethylene(ET)signalling and no change in Asp levels.Our results revealed key differences between the effect of BABA on tomato and other model plants studied until now.Surprisingly,salicylic acid(SA)is not involved in BABA downstream signalization whereas ET and JA play a crucial role. | Martina Zapletalova Corinne Rancurel Benoit Industri Marc Bardin Kevin Le Brigand Philippe Nicot Virginie Magnone Aurelie Seassau Pascal Barbry David Potesil Zbynek Zdrahal Michel Ponchet Jan Lochman | 2023 | Horticulture Research2023，10，6： | 0 |
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