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논문 기본 정보

자료유형
학술저널
저자정보
Hwang Jung-Won (School of Life Science and Biotechnology, College of National Sciences, Kyungpook National University) Kim Sung-Kon (Department of Food Science and Nutrition, Dankook University) Lee Jeom-Sig (National Yeongnam Agricultural Research Institute, NICS, RDA) Kim In-Soo (School of Life Science and Biotechnology, College of National Sciences, Kyungpook National University)
저널정보
한국식물학회 식물학회지 식물학회지 제48권 제4호
발행연도
2005.1
수록면
448 - 455 (8page)

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초록· 키워드

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Amylose and amylopectin are determinants of the physicochemical properties for starch and grain quality in rice. Their biosynthesis is catalyzed by the interplay of ADP-glucose pyrophosphorylase (AGPase), granule-bound starch synthase (GBSS), soluble starch synthase (SSS), a starch branching enzyme (SBE), and a starch debranching enzyme (SDE). In this study, the genes for these enzymes were highly expressed 7 to 28 days after flowering during grain development, and their expression closely matched increases in both starch content and grain weight. Among all the tested cultivars, amylose contents in the rice grains remained essentially constant throughout their development. The AGPase gene was highly expressed in the high-yield cultivars of both glutinous and non-glutinous rice. The SSS gene was actively expressed when mature GBSS mRNA decreased. Genes responsible for amylopectin biosynthesis were simultaneously expressed in the late stage of grain development. We have now demonstrated that the expression patterns of starch biosynthetic genes differ between glutinous and non-glutinous rice, and between Tongil (a Japonica/Indica hybrid) and Japonica types.

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