イネにおける穂軸の大維管束の走向と分化時期の品種間差異

DOI 日本農学文献記事索引 Web Site Web Site 被引用文献10件 参考文献15件

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タイトル別名
  • Varietal Differences of the Course and Differentiation Time of Large Vascular Bundles in the Rachis of Rice.
  • イネ ニ オケル ホジク ノ ダイイカンソク ノ ソウコウ ト ブンカ ジキ

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The course and differentiation time of large vascular bundles in the rachis of japonica (cv. Musashi-kogane) and indica (cv. IR36) rice were compared. Large vascular bundles in the rachis consisted of large vascular bundles entering from the primary rachis branch (Vp) and the secondary branch (Vp). In Musashi-kogane, one Vp entered from each primary branch to the rachis and travelled down to the neck internode without fusion. Usually, Vs doesn't enter the rachis. Therefore, the vascular ratio shown by the number of large vascular bundles in the neck internode against the number of primary rachis branches was about one. On the other hand, in IR36, one Vp entered from the primary rachis branch to the rachis at the upper position on the rachis. However two Vs and one Vp entered the rachis at the middle and lower positions on rachis. Some of the Vs fused together in the rachis so that the vascular ratio was about two. In both cultivars, Vp differentiated at the early stage of secondary rachis branch primordia differentiation and Vs at the early to middle stage of flower primordia differentiation. These results imply that the development of primary rachis branches as compared with that of rachis is faster in IR36 than Musashikogane.

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