ヒジキの株の成長について

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  • On Growth of “Bush” in <i>Hijikia fusiforme</i>
  • ヒジキ ノ カブ ノ セイチョウ ニ ツイテ

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In order to get Some knowledge on multiplying Hijikia fusiforme, an edible fucacious alga in Japan, growth of its bush was observed from 1946 to 1951 at the vicinity of the Misaki Marine Biological Station.<br> Young buds of the 1 st year become visible in late autumn. In winter they grow in size and put forth some rhizomes. In the successive spring they shed eggs and sperm and then they decay except the rhizomes.<br> New buds of the 2 nd year sprout from the rhizomes of the 1 st year in the spring, the latter decay in late summer. The buds grow large in winter and put forth several new rhizomes. In the next spring they shed eggs and sperm and then they decay except the rhizomes, the latter put forth buds of the 3 rd year in spring and decay in late summer. The cycle goes on more than five years.<br> So that the plants of Hijikia are not perennial, but new plants grow annually by asexual repreduction by rhizomes. In this way, plants from a egg make a bush, which is alive more than several years, growing in the first some years as shown in Table 1.

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