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Effect of high temperature on grain filling period, yield, amylose content and activity of starch biosynthesis enzymes in endosperm of basmati rice
Journal of the science of food and agriculture, 2015-08, Vol.95 (11), p.2237-2243
Ahmed, Nisar
Tetlow, Ian J
Nawaz, Sehar
Iqbal, Ahsan
Mubin, Muhammad
Nawaz ul Rehman, Muhammad Shah
Butt, Aisha
Lightfoot, David A
Maekawa, Masahiko
2015
Details
Autor(en) / Beteiligte
Ahmed, Nisar
Tetlow, Ian J
Nawaz, Sehar
Iqbal, Ahsan
Mubin, Muhammad
Nawaz ul Rehman, Muhammad Shah
Butt, Aisha
Lightfoot, David A
Maekawa, Masahiko
Titel
Effect of high temperature on grain filling period, yield, amylose content and activity of starch biosynthesis enzymes in endosperm of basmati rice
Ist Teil von
Journal of the science of food and agriculture, 2015-08, Vol.95 (11), p.2237-2243
Ort / Verlag
Chichester, UK: John Wiley & Sons, Ltd
Erscheinungsjahr
2015
Link zum Volltext
Quelle
Wiley Online Library - AutoHoldings Journals
Beschreibungen/Notizen
BACKGROUND High temperature during grain filling affects yield, starch amylose content and activity of starch biosynthesis enzymes in basmati rice. To investigate the physiological mechanisms underpinning the effects of high temperature on rice grain, basmati rice was grown under two temperature conditions – 32 and 22 °C – during grain filling. RESULTS High temperature decreased the grain filling period from 32 to 26 days, reducing yield by 6%, and caused a reduction in total starch (3.1%) and amylose content (22%). Measurable activities of key enzymes involved in sucrose to starch conversion, sucrose synthase, ADP‐glucose pyrophosphorylase, starch phosphorylase and soluble starch synthase in endosperms developed at 32 °C were lower than those at 22 °C compared with similar ripening stage on an endosperm basis. In particular, granule‐bound starch synthase (GBSS) activity was significantly lower than corresponding activity in endosperms developing at 22 °C during all developmental stages analyzed. CONCLUSION Results suggest changes in amylose/amylopectin ratio observed in plants grown at 32 °C was attributable to a reduction in activity of GBSS, the sole enzyme responsible for amylose biosynthesis. © 2014 Society of Chemical Industry
Sprache
Englisch
Identifikatoren
ISSN: 0022-5142
eISSN: 1097-0010
DOI: 10.1002/jsfa.6941
Titel-ID: cdi_proquest_miscellaneous_1709762414
Format
–
Schlagworte
Amylopectin - metabolism
,
Amylose - biosynthesis
,
Amylose - metabolism
,
amylose content
,
basmati rice
,
Biomass
,
Biosynthesis
,
Carbohydrate Metabolism
,
Carbohydrates
,
Edible Grain - enzymology
,
Edible Grain - growth & development
,
Edible Grain - metabolism
,
Effects
,
Endosperm - enzymology
,
Enzymes
,
Glucosyltransferases - metabolism
,
Grain
,
Grains
,
High temperature
,
Hot Temperature
,
Humans
,
Oryza - enzymology
,
Oryza - growth & development
,
Oryza - metabolism
,
Phosphorylases
,
Phosphorylases - metabolism
,
Plant Proteins - metabolism
,
Plants, Genetically Modified
,
Reduction
,
Rice
,
Starch - biosynthesis
,
Starch Synthase - metabolism
,
Starches
,
Sucrose
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