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Effects of Post-Anthesis Soil Water Status on the Activities of Kiy Regulatory Enzymes of Starch and Protein Accumulation in Wheat Grains

Zhujie Xie, Jiang Dong, Weixing Cao, Dai Tingbo, Qi Jing

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Abstract

Two winter wheat ( Triticum aestivum L.)varieties differing in grain protein content, Wanmai 38 and Yangmai 9 potted in a greenhouse, were used to investigate the effects of soil drought (SRWC=45%-50%) and waterlogging beginning from 4 days after anthesis (DPA) on the activities of key regulatory enzymes of grain starch and protein accumulation. The results in both leaves and grains showed that the patterns of changes in the activities of enzymes were similar in the two varieties. Compared with CK (SRWC= 75%-80%) , sucrose content and sucrose phosphate synthase (SPS) activity declined more markedly than amino acid content and glutamine synthetase (GS) activity under drought and waterlogging. Both drought and waterlogging resulted in decreases in the activities of sucrose synthase (SS) and granule-bound starch synthase (GBSS), and especially in that of soluble starch synthase (SSS).

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What this paper is about

Two winter wheat ( Triticum aestivum L.)varieties differing in grain protein content, Wanmai 38 and Yangmai 9 potted in a greenhouse, were used to investigate the effects of soil drought (SRWC=45%-50%) and waterlogging beginning from 4 days after anthesis (DPA) on the activities of key regulatory enzymes of grain starch and protein accumulation. The results in both leaves and grains showed that the patterns of changes in the activities of enzymes were similar in the two varieties. Compared with CK (SRWC= 75%-80%) , sucrose content and sucrose phosphate synthase (SPS) activity declined more markedly than amino acid content and glutamine synthetase (GS) activity under drought and waterlogging. Both drought and waterlogging resulted in decreases in the activities of sucrose synthase (SS) and granule-bound starch synthase (GBSS), and especially in that of soluble starch synthase (SSS).

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Available abstract

Two winter wheat ( Triticum aestivum L.)varieties differing in grain protein content, Wanmai 38 and Yangmai 9 potted in a greenhouse, were used to investigate the effects of soil drought (SRWC=45%-50%) and waterlogging beginning from 4 days after anthesis (DPA) on the activities of key regulatory enzymes of grain starch and protein accumulation. The results in both leaves and grains showed that the patterns of changes in the activities of enzymes were similar in the two varieties. Compared with CK (SRWC= 75%-80%) , sucrose content and sucrose phosphate synthase (SPS) activity declined more markedly than amino acid content and glutamine synthetase (GS) activity under drought and waterlogging. Both drought and waterlogging resulted in decreases in the activities of sucrose synthase (SS) and granule-bound starch synthase (GBSS), and especially in that of soluble starch synthase (SSS).

Key concepts: Starch synthase, Sucrose-phosphate synthase, Sucrose synthase, Anthesis, Starch, Sucrose, Waterlogging (archaeology), Enzyme

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Effects of Post-Anthesis Soil Water Status on the Activities of Kiy Regulatory Enzymes of Starch and Protein Accumulation in Wheat Grains — Research Paper | ScholarLens