Journal
PLANT CELL AND ENVIRONMENT
Volume 40, Issue 9, Pages 1679-1690Publisher
WILEY
DOI: 10.1111/pce.12998
Keywords
Abiotic stress; cysteine protease clans; drought tolerance; small ubiquitin-like modifiers; SUMO; wheat bioinformatics
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Funding
- National Research Foundation of South Africa (NRF Competitive Programme for Rated Researchers (CPRR)) [CPR20110615000019459]
- NRF Incentive Funding for Rated Researchers Programme (IFR) [IFR201004200013]
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Bread wheat (Triticum aestivum L.) provides about 19% of global dietary energy. Environmental stress, such as drought, affects wheat growth causing premature plant senescence and ultimately plant death. A plant response to drought is an increase in protease-mediated proteolysis with rapid degradation of proteins required for metabolic processes. Among the plant proteases that are increased in their activity following stress, cysteine proteases are the best characterized. Very little is known about particular wheat cysteine protease sequences, their expression and also localization. The current knowledge on wheat cysteine proteases belonging to the five clans (CA, CD, CE, CF and CP) is outlined, in particular their expression and possible function under drought. The first successes in establishing an annotated wheat genome database are further highlighted which has allowed more detailed mining of cysteine proteases. We also share our thoughts on future research directions considering the growing availability of genomic resources of this very important food crop. Finally, we also outline future application of developed knowledge in transgenic wheat plants for environmental stress protection and also as senescence markers to monitor wheat growth under environmental stress conditions.
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