Record Details

Spikelet Proteomic Response to Combined Water Deficit and Heat Stress in Rice (Oryza sativa cv. N22)

OAR@ICRISAT

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Relation http://oar.icrisat.org/1219/
http://dx.doi.org/10.1007/s12284-011-9059-x
 
Title Spikelet Proteomic Response to Combined Water Deficit
and Heat Stress in Rice (Oryza sativa cv. N22)
 
Creator Jagadish, S V K
Muthurajan, R
Rang, Z W
Malo, R
Heuer, S
Bennett, J
Craufurd, P Q
 
Subject Agriculture-Farming, Production, Technology, Economics
 
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.
 
Publisher Springer
 
Date 2011
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/1219/1/Rice4_1-11_2011.pdf
Jagadish, S V K and Muthurajan, R and Rang, Z W and Malo, R and Heuer, S and Bennett, J and Craufurd, P Q (2011) Spikelet Proteomic Response to Combined Water Deficit and Heat Stress in Rice (Oryza sativa cv. N22). Rice, 4 (1). pp. 1-11.