Photoperiod-and temperature-mediated control of the ethylene response and winter dormancy induction in Prunus mume  

作　　者：Ping Li Tangchun Zheng Xiaokang Zhuo Man Zhang Xue Yong Lulu Li Jia Wang Tangren Cheng Qixiang Zhang 

机构地区：[1]Beijing Advanced Innovation Center for Tree Breeding by Molecular Design,Beijing Forestry University,Beijing 100083,China [2]Beijing Key Laboratory of Ornamental Plants Germplasm Innovation&Molecular Breeding,National Engineering Research Center for Floriculture,Beijing Laboratory of Urban and Rural Ecological Environment,Engineering Research Center of Landscape Environment of Ministry of Education,Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education,Beijing Forestry University,Beijing 100083,China [3]School of Landscape Architecture,Beijing Forestry University,Beijing 100083,China

出　　处：《Horticultural Plant Journal》2021年第3期232-242,共11页园艺学报（英文版）

基　　金：The research was supported by the National Key Research and Development Programof China(Grant No.2019YFD1001500);the National Natural Science Foundation of China(Grant No.31800595);Special Fund for Beijing Common Construction Project.

摘　　要：Plant dormancy is essential for perennial plant survival.Different genotypes of Prunus mume,including Eumume group and Apricot Mei group,undergo leaf senescence and dormancy at different times.In order to verify the cold resistance of P.mume,freeze resistance evaluation was carried out.Our results showed that Apricot Mei group had a stronger freezing tolerance than Eumume group and that leaf senescence and dormancy of Apricot Mei group occurred at an earlier period before winter.Based on phenotypic data in response to seasonal climate change,the significant candidate regions were selected using GWAS.Furthermore,through KEGG pathway and qRT-PCR analyses,we found that the ethylene-related genes,including PmEIL(Pm002057)and PmERF(Pm004265),were significantly upregulated in‘Songchun’Mei(Apricot Mei group)and downregulated in‘Zaohua Lve’Mei(Eumume group).Ethylene-related genes expression models showed that ethylene may be indirectly involved in the induction of dormancy.The PmEIL and PmERF genes were the core genes of the ethylene signal transduction pathway and were regulated by the exogenous ACC or PZA compounds.For non-dormant or weekly dormant perennial plants,application of ACC was able to induce plant dormancy and thus enhance cold/freeze tolerance.Overall,the expression of the major ethylene genes played a significant role in dormancy induction and freezing tolerance in P.mume;accordingly,application of ACC and PZA compounds were an effective approach for enhancing cold/freeze of tolerance of woody plant.

关 键 词：Prunus mume Seasonal climate change Ethylene-related genes Dormancy induction Freezing tolerance 

分 类 号：S662.3[农业科学—果树学]