Dear Editor,The selection of non-shattering seeds has been a primary target during crop domestication,making wild rice suitable for human cultivation.Seed shattering involves development and separation of the abscissi...Dear Editor,The selection of non-shattering seeds has been a primary target during crop domestication,making wild rice suitable for human cultivation.Seed shattering involves development and separation of the abscission zone(AZ).The AZ consists of several layers of thin-walled,iso-diametrically flattened cells,marking the point at which the cells of the falling organ separate from the parent plant(Sexton and Roberts,1982).Many previously identified factors that regulate seed shattering,such as SH4,qSH1,qSH3,SHAT1,SSH1,and SH5,all participate in development of the AZ in rice(Wu et al.,2023a;2023b).However,what occurs at the cellular level to enable abscission and what induces the separation of the AZ in rice remain unclear.Here,we report that the major facilitator superfamily(MFS)gene SHATTERING ABORTION3(SHAT3)functions as a novel regulator of seed shattering in rice(Oryza sativa)by facilitating jasmonic acid(JA)accumulation in the AZ and pedicel(AZ-P)region to promote AZ separation.However,the non-shattering phenotype of shat3 cannot be complemented by exogenous JA,indicating that SHAT3 has unique functions that have yet to be explored.展开更多
基金funded by the National Natural Science Foundation of China(31788103,31601281,and 31401367).
文摘Dear Editor,The selection of non-shattering seeds has been a primary target during crop domestication,making wild rice suitable for human cultivation.Seed shattering involves development and separation of the abscission zone(AZ).The AZ consists of several layers of thin-walled,iso-diametrically flattened cells,marking the point at which the cells of the falling organ separate from the parent plant(Sexton and Roberts,1982).Many previously identified factors that regulate seed shattering,such as SH4,qSH1,qSH3,SHAT1,SSH1,and SH5,all participate in development of the AZ in rice(Wu et al.,2023a;2023b).However,what occurs at the cellular level to enable abscission and what induces the separation of the AZ in rice remain unclear.Here,we report that the major facilitator superfamily(MFS)gene SHATTERING ABORTION3(SHAT3)functions as a novel regulator of seed shattering in rice(Oryza sativa)by facilitating jasmonic acid(JA)accumulation in the AZ and pedicel(AZ-P)region to promote AZ separation.However,the non-shattering phenotype of shat3 cannot be complemented by exogenous JA,indicating that SHAT3 has unique functions that have yet to be explored.
