Maintaining the yield of edible rice in a warming world

Functional Plant Biology : FPB
Melissa Fitzgerald, Adoracion P Resurreccion

Abstract

High temperature increases the amount of chalk in rice (Oryza sativa L.) grains, which causes grains to break during polishing, lowering the amount of rice for consumption. Here, we examined the effect of elevated temperature on substrate supply to the panicle, the capacity of the panicle to produce edible grains, and underlying factors affecting yield of edible grain in two varieties. During grain-filling, substrate supply followed a bell shaped curve, and high temperature significantly shortened supply time. The rate of grain-filling did not change and paddy yield fell in both varieties. In high temperature, yield loss in IR8 was due to lighter grains relative to those grown in cool temperature, but in IR60, it was due to the early sacrifice of 30% of the spikelets. The yield of edible rice was zero for IR8 and ~60% for IR60 for the high temperature treatments, and 100% for IR60 and 70% for IR8 in the cool temperature. IR60 differs from IR8 in regulation of substrate supply, architecture of the panicles and the capacity of the panicles to alter sink size in response to the stress and these factors may be responsible for the difference in edible rice in the two varieties.

References

Apr 17, 2003·Journal of Agricultural and Food Chemistry·James Patindol, Ya-Jane Wang
Jul 1, 2004·Proceedings of the National Academy of Sciences of the United States of America·Shaobing PengKenneth G Cassman
Jan 19, 2005·Annals of Botany·Satoshi MoritaJun-Ichi Takanashi
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May 10, 2005·Biomacromolecules·Gregory R ZieglerJames Runt
Jul 12, 2005·Biomacromolecules·Jeffrey V CastroMelissa A Fitzgerald
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Citations

Mar 23, 2012·Journal of Experimental Botany·P MadanT R Wheeler
Oct 27, 2015·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Xiangqian ZhaoMelissa A Fitzgerald
Jun 19, 2013·PloS One·Xiangqian Zhao, Melissa Fitzgerald
Oct 16, 2015·Global Change Biology·Yasuhiro UsuiToshihiro Hasegawa
Feb 11, 2015·Journal of Experimental Botany·Nese SreenivasuluPolavarpu B Kavi Kishor
Mar 8, 2013·Annual Review of Food Science and Technology·Terry J SiebenmorgenSarah B Lanning
Oct 28, 2016·Journal of Food Science and Technology·Parmeet KaurGulshan Mahajan
Jan 26, 2018·Global Change Biology·Julian Ramirez-VillegasAndrew J Challinor
Apr 1, 2011·Functional Plant Biology : FPB·Krishna S V JagadishPeter Q Craufurd
Nov 30, 2019·Frontiers in Plant Science·Balpreet K DhattHarkamal Walia
Aug 22, 2014·Plant, Cell & Environment·S V K JagadishW P Quick

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