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A recently evolved bahd acetyltransferase,responsible for bitter soyasaponin A production,is indispensable for soybean seed germination

引用

Journal of Integrative Plant Biology 2023年第11期65卷 2490-2504页

作者： Jia Yuan Liya Ma Yan Wang Xindan Xu Rui Zhang Chengyuan Wang Wenxiang Meng Zhixi Tian Yihua Zhou Guodong Wang State Key Laboratory of Plant Genomics Institute of Genetics and Developmental BiologyThe Innovative Academy of Seed Designthe Chinese Academy of SciencesBeijing 100101China College of Advanced Agricultural Sciences University of Chinese Academy of SciencesBeijing 100039China State Key Laboratory of Molecular Developmental Biology the Chinese Academy of SciencesBeijing 100190China The Center for Microbes Development and HealthInstitute of Pasteur of Shanghaithe Chinese Academy of SciencesShanghai 200031China State Key Laboratory of Plant Cell and Chromosome Engineering Institute of Genetics and Developmental BiologyThe Innovative Academy of Seed Designthe Chinese Academy of SciencesBeijing 100101China

Soyasaponins are major small molecules that accumulate in soybean(Glycine max)*** them,type-A soyasaponins,fully acetylated at the terminal sugar of their C22 sugar chain,are responsible for the bitter taste of soybean-derived ***,the molecular basis for the acetylation of type-A soyasaponins remains ***,we identify and characterize Gm SSAc T1,encoding a BADH-type soyasaponin acetyltransferase that catalyzes three or four consecutive acetylations on type-A soyasaponins in vitro and in *** analysis and biochemical assays suggest that Gm SSAc T1 likely evolved from acyltransferases present in leguminous plants involved in isoflavonoid ***-of-function mutants of Gm SSAc T1 exhibited impaired seed germination,which attribute to the excessive accumulation of null-acetylated type-A *** conclude that Gm SSAc T1 not only functions as a detoxification gene for high accumulation of type-A soyasaponins in soybean seeds but is also a promising target for breeding new soybean varieties with lower bitter soyasaponin content.

关键词： bahd acyltransferase seed germination soyasaponin soybean

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