Emergence of Crown Roots from the Elongated Culm in Several Floating Rice Varieties under Submerged Conditions

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  • 浸水条件下で節間伸長した浮稲における冠根の発生
  • シンスイ ジョウケンカ デ セッカン シンチョウシタ フ イネ ニ オケル カ

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Abstract

Emergence of“upper roots”from a certain node of elongated culm under water was roughly synchronized with the leaf-emergence from the upper fourth (or fifth) node, while emergence of“lower roots”emerged with that from the upper second (or third) node. In each node, the number of the upper roots was fewer than that of the lower roots. The upper roots had larger root diameter with about four large metaxylems, whereas the lower roots had smaller root diameter with about only one metaxylem.

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