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Effects of high temperature and shading on grain abscisic acid content and grain filling pattern in rice (Oryza sativaL.)

Content Provider	Scilit
Author	Tsukaguchi, Tadashi Tanaka, Ryuta Inoue, Hironori Nakagawa, Hiroshi
Copyright Year	2018
Description	Abscisic acid (ABA) is a key factor regulating starch biosynthesis genes and is involved in assimilate partitioning to individual spikelets. The objective of this study was to clarify the effects of high temperature and shading during grain filling on grain ABA content and the grain filling pattern of spikelets located at different positions in a panicle. We grew the rice cultivar 'Koshihikari' in pots in 2009 under two temperature regimes and two light conditions during grain filling. We periodically measured grain dry weight and grain ABA content (pmol per grain) and concentration (pmol per grain dry weight). Shading increased a grain weight difference between superior and inferior spikelets while high temperature decreased the difference regardless of light condition. High temperature decreased ABA content and concentration in grains. There was a close correlation between mean grain ABA content and mean grain-filling rate averaged over the first half of grain filling.
Related Links	https://www.tandfonline.com/doi/pdf/10.1080/1343943X.2018.1524264?needAccess=true
Ending Page	412
Page Count	6
Starting Page	407
ISSN	1343943X
e-ISSN	13491008
DOI	10.1080/1343943x.2018.1524264
Journal	Plant Production Science
Issue Number	4
Volume Number	21
Language	English
Publisher	Informa UK Limited
Publisher Date	2018-10-02
Access Restriction	Open
Subject Keyword	Journal: Plant Production Science Agronomy Abscisic Acid (aba) Grain Grain-filling Rate High Temperature Rice (oryza Sativa L.)
Content Type	Text
Subject	Agronomy and Crop Science

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