Expression of a rice soluble starch synthase gene in transgenic wheat improves the grain yield under heat stress conditions

Wheat (Triticum aestivum L.) is a temperate cereal with an optimum temperature range of 15–22°C during the grain filling stage. Heat stress is one of the major environmental constraints for wheat production worldwide. Temperatures above 25°C during the grain filling stage significantly reduced wheat...

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Vydané v:	In vitro cellular & developmental biology. Plant Ročník 54; číslo 3; s. 216 - 227
Hlavní autori:	Tian, Bin, Talukder, Shyamal K., Fu, Jianming, Fritz, Allan K., Trick, Harold N.
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	New York Springer Science + Business Media, LLC (Springer) 01.06.2018 Springer US Springer Nature B.V
Predmet:	Agricultural production Biomedical and Life Sciences Biosynthesis BIOTECHNOLOGY Cell Biology Climate change Crop production Crop yield Crops Deactivation Deoxyribonucleic acid Developmental Biology DNA Endosperm Enzymes filling period Gene expression Genes Genetic transformation Genetically altered foods Glucose Grain grain yield Heat stress Heat tolerance High temperature in vitro studies Inactivation Life Sciences Photosynthesis Plant Breeding/Biotechnology Plant Genetics and Genomics Plant Sciences promoter regions Proteins Rice Seeds Starch Starch synthase temperature Transgenic plants Triticum aestivum Weight Wheat Yield Heat stress Thermotolerance Starch synthesis Wheat transformation
ISSN:	1054-5476, 1475-2689
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Shrnutí:	Wheat (Triticum aestivum L.) is a temperate cereal with an optimum temperature range of 15–22°C during the grain filling stage. Heat stress is one of the major environmental constraints for wheat production worldwide. Temperatures above 25°C during the grain filling stage significantly reduced wheat yield and quality. This reduction was reported due to the inactivation of the soluble starch synthase, a key heat-labile enzyme in starch transformation of wheat endosperm. To improve wheat productivity under heat stress, the rice soluble starch synthase I, under the control of either a constitutive promoter or an endosperm-specific promoter, was expressed in wheat and the transgenic lines were monitored for expression and the effects on yield-related traits. The results showed that the transgenic wheat events expressed rice soluble starch synthase I at a high level after four generations, and transgenic plants produced grains of greater weight during heat stress. Under heat stress conditions, the thousand kernel weight increased 21–34% in T2 and T3 transgenic plants compared to the non-transgenic control plants. In addition, the photosynthetic duration of transgenic wheat was longer than in non-transgenic controls. This study demonstrated that the engineering of a heat tolerant soluble starch synthase gene can be a potential strategy to improve wheat yield under heat stress conditions.
Bibliografia:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 content type line 23 Editor: Tom Clemente
ISSN:	1054-5476 1475-2689
DOI:	10.1007/s11627-018-9893-2