4.7 Article

Wheat Line RYNO3936 Is Associated With Delayed Water Stress-Induced Leaf Senescence and Rapid Water-Deficit Stress Recovery

期刊

FRONTIERS IN PLANT SCIENCE
卷 11, 期 -, 页码 -

出版社

FRONTIERS MEDIA SA
DOI: 10.3389/fpls.2020.01053

关键词

random mutagenesis; mutant wheat; drought; photosynthesis; chlorophyll fluorescence; RuBisCO; LC-MS; MS

资金

  1. National Research Foundation of South Africa (NRF Competitive Programme for Rated Researchers (CPRR)) [CPR20110615000019459]
  2. National Research Foundation of South Africa (NRF Incentive Funding for Rated Researchers Programme (IFR)) [IFR201004200013]
  3. Winter Cereal Trust

向作者/读者索取更多资源

Random mutagenesis was applied to produce a new wheat mutant (RYNO3926) with superior characteristics regarding tolerance to water deficit stress induced at late booting stage. The mutant also displays rapid recovery from water stress conditions. Under water stress conditions mutant plants reached maturity faster and produced more seeds than its wild type wheat progenitor. Wild-type Tugela DN plants died within 7 days after induction of water stress induced at late booting stage, while mutant plants survived by maintaining a higher relative moisture content (RMC), increased total chlorophyll, and a higher photosynthesis rate and stomatal conductance. Analysis of the proteome of mutant plants revealed that they better regulate post-translational modification (SUMOylation) and have increased expression of ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO) proteins. Mutant plants also expressed unique proteins associated with dehydration tolerance including abscisic stress-ripening protein, cold induced protein, cold-responsive protein, dehydrin, Group 3 late embryogenesis, and a lipoprotein (LAlv9) belonging to the family of lipocalins. Overall, our results suggest that our new mutant RYNO3936 has a potential for inclusion in future breeding programs to improve drought tolerance under dryland conditions.

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