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

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

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