The emergence of novel phytopathogens and the accelerated spread of plant diseases to new regions,driven by global climate change,constitute significant threats to agricultural resources.Rice,a major tropical staple c...The emergence of novel phytopathogens and the accelerated spread of plant diseases to new regions,driven by global climate change,constitute significant threats to agricultural resources.Rice,a major tropical staple crucial for global food security,possesses six transcription factor superfamilies-AP2/ERF,bHLH,bZIP,MYB,NAC,and WRKY-that function in innate immunity against pathogens.We review their biological functions and regulatory mechanisms in rice immunity.展开更多
Diverse bacterial and fungal pathogens attack plants,causing biotic stress and severe yield losses globally.These losses are expected to become more serious as climate change improves conditions for many pathogens.The...Diverse bacterial and fungal pathogens attack plants,causing biotic stress and severe yield losses globally.These losses are expected to become more serious as climate change improves conditions for many pathogens.Therefore,identifying genes conferring broad-spectrum disease resistance and elucidating their underlying mechanisms provides important resources for plant breeding.WRKY transcription factors affect plant growth and stress responses.However,the functions of many WRKY proteins remain to be elucidated.Here,we demonstrated the role of rice(Oryza sativa)WRKY groupⅢtranscription factor OsWRKY65 in immunity.OsWRKY65 localized to the nucleus and acted as transcriptional repressor.Genetic and molecular functional analyses showed that OsWRKY65 increases resistance to the fungal pathogen Fusarium fujikuroi through downregulation of GA signaling and upregulation of JA signaling.Moreover,OsWRKY65 modulated the expression of the key genes that confer susceptibility or resistance to Xanthomonas oryzae pv.oryzae to enhance immunity against the pathogen.In particular,OsWRKY65directly bound to the promoter region of OsSWEET13 and repressed its expression.Taken together,our findings demonstrate that the OsWRKY65 enhances resistance to fungal and bacterial pathogens in rice.展开更多
Dear Editor,Given the role of MYC2 as a pivotal regulator in the jasmonate(JA)signaling pathway,influencing the expression of a multitude of downstream genes(Zander et al.,2020),understanding the regulatory dynamics o...Dear Editor,Given the role of MYC2 as a pivotal regulator in the jasmonate(JA)signaling pathway,influencing the expression of a multitude of downstream genes(Zander et al.,2020),understanding the regulatory dynamics of MYC2 is essential for unraveling plant responses to stress conditions and hormonal signals.Previous studies on the regulation of MYC2 by MPK6 have reported conflicting findings.Takahashi et al.(2007)reported that MPK6 acts as a negative regulator of MYC2,whereas Sethi et al.(2014)proposed a positive regulatory role.Despite these findings,the precise genetic and biochemical mechanisms underlying the MPK6-MYC2 interaction remain poorly understood,highlighting the need for further investigation.展开更多
基金supported by Research Program for Agricultural Science and Technology Development,Republic of Korea(PJ01570601)the Fellowship Program(PJ01661001)of the National Institute of Agricultural Sciences,Republic of KoreaRural Development Administration,Republic of Korea.
文摘The emergence of novel phytopathogens and the accelerated spread of plant diseases to new regions,driven by global climate change,constitute significant threats to agricultural resources.Rice,a major tropical staple crucial for global food security,possesses six transcription factor superfamilies-AP2/ERF,bHLH,bZIP,MYB,NAC,and WRKY-that function in innate immunity against pathogens.We review their biological functions and regulatory mechanisms in rice immunity.
基金funded by Research Program for Agricultural Science and Technology Development(PJ01570601)and the Fellowship Program(PJ01661001 and PJ01570601)of the National Institute of Agricultural Sciences,Rural Development Administration,Republic of Korea。
文摘Diverse bacterial and fungal pathogens attack plants,causing biotic stress and severe yield losses globally.These losses are expected to become more serious as climate change improves conditions for many pathogens.Therefore,identifying genes conferring broad-spectrum disease resistance and elucidating their underlying mechanisms provides important resources for plant breeding.WRKY transcription factors affect plant growth and stress responses.However,the functions of many WRKY proteins remain to be elucidated.Here,we demonstrated the role of rice(Oryza sativa)WRKY groupⅢtranscription factor OsWRKY65 in immunity.OsWRKY65 localized to the nucleus and acted as transcriptional repressor.Genetic and molecular functional analyses showed that OsWRKY65 increases resistance to the fungal pathogen Fusarium fujikuroi through downregulation of GA signaling and upregulation of JA signaling.Moreover,OsWRKY65 modulated the expression of the key genes that confer susceptibility or resistance to Xanthomonas oryzae pv.oryzae to enhance immunity against the pathogen.In particular,OsWRKY65directly bound to the promoter region of OsSWEET13 and repressed its expression.Taken together,our findings demonstrate that the OsWRKY65 enhances resistance to fungal and bacterial pathogens in rice.
基金This research was supported by the DOE Great Lakes Bioenergy Research Center(DOE BER Office of Science DE-SC0018409),the Brain Pool Program by the Ministry of Science and ICT through the National Research Foundation(NRF)of Korea(RS-2023-00262576),and the National Research Foundation of Korea(NRF-2023R1A2C1004193).M.-Y.J.was additionally supported by an NRF grant funded by the Korean government(Ministry of Science and ICT)(RS-2025000518246).
文摘Dear Editor,Given the role of MYC2 as a pivotal regulator in the jasmonate(JA)signaling pathway,influencing the expression of a multitude of downstream genes(Zander et al.,2020),understanding the regulatory dynamics of MYC2 is essential for unraveling plant responses to stress conditions and hormonal signals.Previous studies on the regulation of MYC2 by MPK6 have reported conflicting findings.Takahashi et al.(2007)reported that MPK6 acts as a negative regulator of MYC2,whereas Sethi et al.(2014)proposed a positive regulatory role.Despite these findings,the precise genetic and biochemical mechanisms underlying the MPK6-MYC2 interaction remain poorly understood,highlighting the need for further investigation.
