Sugar metabolism in expanding husk leaves of flint corn (Zea mays L.) genotypes differing in husk leaf size

Journal of Agricultural Science 139 巻 1 号 37-45 頁 2002-08 発行
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タイトル ( eng )
Sugar metabolism in expanding husk leaves of flint corn (Zea mays L.) genotypes differing in husk leaf size
作成者
Fujikawa Y.
Sendo S.
Oka T.
Yamana H.
Ofosu-Bude K.G.
El-Shemy H.
Fujita K.
収録物名
Journal of Agricultural Science
139
1
開始ページ 37
終了ページ 45
抄録
Relationships between leaf expansion and MeOH-soluble (cytosol) and cell-wall fractions, and their sugar composition prior to silking in flint corn lines were studied. A greater husk leaf area of one genotype, X-15 is mainly due to prolonged and higher rate of expansion. Prior to rapid expansion of husk leaf area, neutral sugars in the cytosol fraction accounted for most of the non-starch carbohydrates (56-62%), while hemicellulose and cellulose fractions accounted for less than 20%.0 In mature leaf parts, however, sugars in the cytosol fraction decreased but those in hemicellulose and cellulose fractions increased by 30 0x1.e499cp-891nd 42%, respectively. The predominant sugar in the cytosol fraction was glucose (Glc), while in the hemicellulose fraction xylose (Xyl) and arabinose (Ara) dominated. During rapid expansion of husk leaves, 13C was incorporated at a higher rate into hemicellulose than cellulose, and this process was more active in X-15 than in other genotypes. During an identical period, 13C atom 0.000000e+00xcess in Xyl increased markedly in the hemicellulose fraction, however it remained low in the cytosol one. The current results suggest that synthesis of Xyl and xylan plays an important role in renewal of hemicellulose, which may be required for expansion.
著者キーワード
metabolism
sugar
NDC分類
生物科学・一般生物学 [ 460 ]
言語
英語
資源タイプ 学術雑誌論文
出版者
Cambridge University Press
発行日 2002-08
権利情報
Copyright (c) 2002 Cambridge University Press
出版タイプ Version of Record(出版社版。早期公開を含む)
アクセス権 オープンアクセス
収録物識別子
[ISSN] 0021-8596
[DOI] 10.1017/S0021859602002319
[DOI] http://dx.doi.org/10.1017/S0021859602002319 ~の異版である