Climate change: implications for the yield of edible rice

Zhao, Xiangqian and Fitzgerald, Melissa (2013) Climate change: implications for the yield of edible rice. PLoS ONE, 8 6: e66218.1-e66218.9. doi:10.1371/journal.pone.0066218


Author Zhao, Xiangqian
Fitzgerald, Melissa
Title Climate change: implications for the yield of edible rice
Journal name PLoS ONE   Check publisher's open access policy
ISSN 1932-6203
Publication date 2013-06-12
Sub-type Article (original research)
DOI 10.1371/journal.pone.0066218
Open Access Status DOI
Volume 8
Issue 6
Start page e66218.1
End page e66218.9
Total pages 9
Place of publication United States
Publisher Public Library of Science
Collection year 2014
Language eng
Formatted abstract
Global warming affects not only rice yield but also grain quality. A better understanding of the effects of climate factors on rice quality provides information for new breeding strategies to develop varieties of rice adapted to a changing world. Chalkiness is a key trait of physical quality, and along with head rice yield, is used to determine the price of rice in all markets. In the present study, we show that for every ~1% decrease in chalkiness, an increase of ~1% in head rice yield follows, illustrating the dual impact of chalk on amount of marketable rice and its value. Previous studies in controlled growing conditions report that chalkiness is associated with high temperature. From 1980–2009 at IRRI, Los Baños, the Philippines, annual minimum and mean temperatures, and diurnal variation changed significantly. The objective of this study was to determine how climate impacts chalkiness in field conditions over four wet and dry seasons. We show that low relative humidity and a high vapour pressure deficit in the dry season associate with low chalk and high head rice yield in spite of higher maximum temperature, but in the opposite conditions of the wet season, chalk is high and head rice yield is low. The data therefore suggest that transpirational cooling is a key factor affecting chalkiness and head rice yield, and global warming per se might not be the major factor that decreases the amount and quality of rice, but other climate factors in combination, that enable the crop to maintain a cool canopy.
Keyword Rice milling quality
Oryza-sativa L.
High-temperature
Kernel development
Field
Photosynthesis
Dimensions
Chalky
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Agriculture and Food Sciences
Official 2014 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 16 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 17 times in Scopus Article | Citations
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