An agravitropic mutant of Arabidopsis, endodermal-amyloplast less 1, that lacks amyloplasts in hypocotyl endodermal cell layer

Kenichiro Fujihira, Tetsuya Kurata, Masaaki K. Watahiki, Ichirou Karahara, Kotaro T. Yamamoto

    Research output: Contribution to journalArticlepeer-review

    44 Citations (Scopus)

    Abstract

    We have isolated a new recessive mutant of Arabidopsis thaliana for gravitropism, endodermal-amyloplast less1 (eal1). eal1 shows reduced gravitropism in hypocotyl, and completely lacks gravitropism in inflorescence stems; root gravitropism is not affected. Starch staining with I-KI solution reveals almost no amyloplasts in eal1 hypocotyls when grown on a sucrose-free medium, though the root columella cells contain as many amyloplasts as wild type. On a medium containing 1% sucrose, eal1 hypocotyls contain as many starch granules as those of wild type, suggesting that starch synthesis is not affected in eal1. The endodermal cell layer which is thought to function as statocytes in hypocotyls is present in eal1. These results suggest that differentiation or development of gravity-responsive amyloplasts are affected in eal1 hypocotyls.

    Original languageEnglish
    Pages (from-to)1193-1199
    Number of pages7
    JournalPlant and Cell Physiology
    Volume41
    Issue number11
    DOIs
    Publication statusPublished - 2000

    Keywords

    • Amyloplast
    • Arabidopsis thaliana
    • Endodermis
    • Gravitropic mutant

    ASJC Scopus subject areas

    • Physiology
    • Plant Science
    • Cell Biology

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