Haynaldia villosa (L.) Schur (syn. Dasypyrurn villosum (L.) Can- dargy) (2n - 14, genome VV), a wild relative of wheat, is an impor- tant gene pool for improving wheat quality and disease resistance. Several g...Haynaldia villosa (L.) Schur (syn. Dasypyrurn villosum (L.) Can- dargy) (2n - 14, genome VV), a wild relative of wheat, is an impor- tant gene pool for improving wheat quality and disease resistance. Several genes found in H. villosa have been transferred into wheat to improve wheat resistance by the development of alien transloca- tion lines. The seed storage protein loci on chromosome 1V contribute to grain quality (Zhang et al., 2014).展开更多
Brassinosteroids(BRs)and abscisic acid(ABA)are essential regulators of plant growth and stress tolerance.Although the antagonistic interaction of BRs and ABA is proposed to ensure the balance between growth and defens...Brassinosteroids(BRs)and abscisic acid(ABA)are essential regulators of plant growth and stress tolerance.Although the antagonistic interaction of BRs and ABA is proposed to ensure the balance between growth and defense in model plants,the crosstalk between BRs and ABA in response to chilling in tomato(Solanum lycopersicum),a warmclimate horticultural crop,is unclear.Here,we determined that overexpression of the BR biosynthesis gene DWARF(DWF)or the key BR signaling gene BRASSINAZOLE-RESISTANT1(BZR1)increases ABA levels in response to chilling stress via positively regulating the expression of the ABA biosynthesis gene 9-CIS-EPOXYCAROTENOID DIOXYGENASE1(NCED1).BR-induced chilling tolerance was mostly dependent on ABA biosynthesis.Chilling stress or high BR levels decreased the abundance of BRASSINOSTEROID-INSENSITIVE2(BIN2),a negative regulator of BR signaling.Moreover,we observed that chilling stress increases BR levels and results in the accumulation of BZR1.BIN2negatively regulated both the accumulation of BZR1protein and chilling tolerance by suppressing ABA biosynthesis.Our results demonstrate that BR signaling positively regulates chilling tolerance via ABA biosynthesis in tomato.The study has implications in production of warm-climate crops in horticulture.展开更多
基金supported by the grants from the National Key Research and Development Program (2016YFD0102001)the National Natural Science Foundation of China (Nos.31571653,31771782,31201204,and 31501305)+6 种基金the International Cooperation and Exchange of the National Natural Science Foundation of China (No.31661143005)the ‘948’ Project of Ministry of Agriculture (2015-Z41)the Fundamental Research Funds for the Central Universities (KYZ201403 and KJ2013003)the Technology Support Program of Jiangsu Province (BE2015352-2)the special fund of Jiangsu Province for the transformation of scientific and technological achievements (BA2017138)the Program of Introducing Talents of Discipline to Universities (B08025)the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
文摘Haynaldia villosa (L.) Schur (syn. Dasypyrurn villosum (L.) Can- dargy) (2n - 14, genome VV), a wild relative of wheat, is an impor- tant gene pool for improving wheat quality and disease resistance. Several genes found in H. villosa have been transferred into wheat to improve wheat resistance by the development of alien transloca- tion lines. The seed storage protein loci on chromosome 1V contribute to grain quality (Zhang et al., 2014).
基金supported by the National Key Research and Development Program (2019YFD1001900)the National Natural Science Foundation of China (31872153,U21A20233)the Fundamental Research Funds for the Central Universities (2021FZZX001-30)。
文摘Brassinosteroids(BRs)and abscisic acid(ABA)are essential regulators of plant growth and stress tolerance.Although the antagonistic interaction of BRs and ABA is proposed to ensure the balance between growth and defense in model plants,the crosstalk between BRs and ABA in response to chilling in tomato(Solanum lycopersicum),a warmclimate horticultural crop,is unclear.Here,we determined that overexpression of the BR biosynthesis gene DWARF(DWF)or the key BR signaling gene BRASSINAZOLE-RESISTANT1(BZR1)increases ABA levels in response to chilling stress via positively regulating the expression of the ABA biosynthesis gene 9-CIS-EPOXYCAROTENOID DIOXYGENASE1(NCED1).BR-induced chilling tolerance was mostly dependent on ABA biosynthesis.Chilling stress or high BR levels decreased the abundance of BRASSINOSTEROID-INSENSITIVE2(BIN2),a negative regulator of BR signaling.Moreover,we observed that chilling stress increases BR levels and results in the accumulation of BZR1.BIN2negatively regulated both the accumulation of BZR1protein and chilling tolerance by suppressing ABA biosynthesis.Our results demonstrate that BR signaling positively regulates chilling tolerance via ABA biosynthesis in tomato.The study has implications in production of warm-climate crops in horticulture.