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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Spikelet proteomic response to combined water deficit and heat stress in rice (Oryza sativa cv. N22)
Rice, Volume 4, No. 1, Year 2011
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Description
In future climates, rice crops will be frequently exposed to water deficit and heat stress at the most sensitive flowering stage, causing spikelet sterility and yield losses. Water deficit alone and in combination with heat stress significantly reduced peduncle elongation, trapping 32% and 55% of spikelets within the leaf sheath, respectively. Trapped spikelets had lower spikelet fertility (66% in control) than those exserted normally (>93%). Average weighted fertility of exserted spikelets was lowest with heat stress (35%) but higher with combined stress (44%), suggesting acquired thermo-tolerance when preceded by water-deficit stress. Proteins favoring pollen germination, i.e., pollen allergens and beta expansin, were highly upregulated with water deficit but were at normal levels under combined stress. The chaperonic heat shock transcripts and proteins were significantly up-regulated under combined stress compared with either heat or water deficit. The importance of spikelet proteins responsive to water deficit and heat stress to critical physiological processes during flowering is discussed. © Springer Science+Business Media, LLC 2010.
Authors & Co-Authors
Jagadish, Krishna SV
Philippines, Makati
International Rice Research Institute
United Kingdom, Reading
University of Reading
Raveendran, Muturajan
Philippines, Makati
International Rice Research Institute
Heuer, Sigrid
Philippines, Makati
International Rice Research Institute
Bennett, John
Philippines, Makati
International Rice Research Institute
Craufurd, Peter Q.
United Kingdom, Reading
University of Reading
India, Patancheru
International Crops Research Institute for the Semi-arid Tropics
Statistics
Citations: 71
Authors: 5
Affiliations: 4
Identifiers
Doi:
10.1007/s12284-011-9059-x
ISSN:
19398425
Research Areas
Environmental
Sexual And Reproductive Health