Gravimorphism in rice and barley: Promotion of leaf elongation by vertical inversion in agravitropically growing plants

Kiyomi Abe, Hideyuki Takahashi, Hiroshi Suge

    Research output: Contribution to journalArticlepeer-review

    7 Citations (Scopus)

    Abstract

    We have compared shoot responses of agravitropic rice and barley plants to vertical inversion with those of normal ones. When rice plants were vertically inverted, the main stems of a japonica type of rice, cv. Kamenoo, showed negative gravitropism at nodes 2-15 of both elongated and non-elongated internodes. However, shoots of lazy line of rice, lazy-Kamenoo, bent gravitropically at nodes 11-15 only elongated internodes but not at nodes 2-10 of non-elongated ones. Thus, shoots of Kamenoo responded gravitropically at all stages of growth, whereas shoots of lazy-Kamenoo did not show gravitropic response before heading. In Kamenoo plants, lengths of both leaf-sheath and leaf-blade were shortened by vertical inversion, but those of the vertically inverted plants of lazy-Kamenoo were significantly longer than the plants in an upright position. When agravitropic and normal plants of barley were vertically inverted, the same results as in rice were obtained; elongation of both leaf-sheath and leaf-blade was inhibited in normal barley plants, Chikurin-Ibaragi No. 1, but significantly stimulated in agravitropic plants of serpentina barley. These results suggest that vertical inversion of rice and barley plants enhances the elongation growth of leaves in the absence of tropistic response.

    Original languageEnglish
    Pages (from-to)523-530
    Number of pages8
    JournalJournal of Plant Research
    Volume111
    Issue number4
    DOIs
    Publication statusPublished - 1998 Dec

    Keywords

    • Gravimorphism
    • Gravitropism
    • Hordeum vulgare L
    • Lazy
    • Leaf growth
    • Oryza sativa L

    ASJC Scopus subject areas

    • Plant Science

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