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Comparative transcriptome analysis reveals the mechanism of exogenous substances inhibiting fertility alteration induced by low temperature in TGMS rice line

文献类型： 外文期刊

作者： Liu, Xiaolin 1 ; Guo, Lingkai 1 ; Wei, Jiaping 1 ; He, Jiwai 2 ; Zhang, Haiqing 2 ; Liu, Aimin 3 ; Xiao, Langtao 4 ; Ma, 1 ;

作者机构： 1.Nanjing Agr Univ, State Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Peoples R China

2.Hunan Agr Univ, Coll Agron, Changsha 410128, Peoples R China

3.Hunan Hybrid Rice Res Ctr, State Key Lab Hybrid Rice, Changsha 410128, Peoples R China

4.Hunan Agr Univ, Southern Reg Collaborat Innovat Ctr Grain & Oil C, Changsha 410128, Peoples R China

关键词： TGMS rice; Fertility alteration; d-Arg; Ethephon; Transcriptome

期刊名称：PLANT GROWTH REGULATION （ 影响因子：3.412； 五年影响因子：3.691 ）

ISSN： 0167-6903

年卷期： 2020 年 90 卷 3 期

页码：

收录情况： SCI

摘要： During two-line hybrid rice seed production, thermo-sensitive genic male sterile (TGMS) rice lines are susceptible to low temperature, leading to fertility alteration (from sterile to fertile) and production of false hybrids (self-pollination). To explore appropriate solutions to reduce the chance of seed production failure, two exogenous substances, d-Arg and ethephon, were applied to restrain the fertility alteration induced by low temperature (22.0 degrees C), respectively. The fertile pollen grains and bagged seed setting rate of TGMS rice line Jing 4155S (with the critical fertility/sterility alteration temperature of 23.5 degrees C) under low temperature could be reduced to 0% by spraying exogenous substances. Transcriptome analysis of young panicles of TGMS rice line Jing 4155S demonstrated that the expressions of multiple transcription factors (MYB, FAR1, and ERF, etc.) changed, and hence affecting various downstream related genes and metabolic processes, including hormonal signal transduction, plant pathogen interactions, circadian rhythm pathway, carbohydrate metabolism, cell wall synthesis, and lipid metabolism, etc. The enhanced ethylene biosynthesis and the prevented redox equilibrium from unbalance to balance in young panicles were one of the major reasons that fertility alteration was inhibited by exogenous substances. Our results made a contribution to the solution for inhibiting fertility alteration induced by low temperature in two-line TGMS rice lines during hybrid seed production.

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