Formation and Developmental Characteristics of A- and B-Type Starch Granules in Wheat Endosperm

YIN Yong-an; QI Jun-cang; LI Wei-hua; CAO Lian-pu; WANG Zi-bu

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Formation and Developmental Characteristics of A- and B-Type Starch Granules in Wheat Endosperm

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Wheat grain natural transverse sections of 12 periods were observed and analyzed using scanning electron micrographs technology and Bio-Quant system IV image analyzer in order to detect the developing process of A- and B-type starch granules. In addition, the chemical composition and starch granule-bound proteins (SGPs) of A- and B-type starch granules were tested and analyzed. The results showed that A-type starch granules in wheat began from 3 d post anthesis (DPA) till grain maturing and B-type starch granules occured after 15 DPA till grain maturing. Approximately 98.5% of chemical compositions in both A- and B-type starch granules were amylose and amylopectin, and more than half of which were amylopectin. The amylopectin contents, average chain length, and chain length distribution (degree of polymerization> 40) of amylopectin in A-type starch granules were significant higher than that of B-type starch granules. SGP-145, SGP-140, and SGP-26 kD were associated with A-type starch formation in wheat grain.

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《农业科学学报（英文版）》 |2012年第1期|73-81|共9页
作者
YIN Yong-an; QI Jun-cang; LI Wei-hua; CAO Lian-pu; WANG Zi-bu;
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Key Oasis Eco-Agriculture Laboratory of Xinjiang Production and Construction Group/Agricultural Faculty, Shihezi University, Shihezi 832003, P.R. China;

Key Oasis Eco-Agriculture Laboratory of Xinjiang Production and Construction Group/Agricultural Faculty, Shihezi University, Shihezi 832003, P.R. China;

Key Oasis Eco-Agriculture Laboratory of Xinjiang Production and Construction Group/Agricultural Faculty, Shihezi University, Shihezi 832003, P.R. China;

Key Oasis Eco-Agriculture Laboratory of Xinjiang Production and Construction Group/Agricultural Faculty, Shihezi University, Shihezi 832003, P.R. China;

Key Oasis Eco-Agriculture Laboratory of Xinjiang Production and Construction Group/Agricultural Faculty, Shihezi University, Shihezi 832003, P.R. China;

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Formation and Developmental Characteristics of A- and B-Type Starch Granules in Wheat Endosperm

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