CHANGES IN WATER RELATIONS AND ENDOGENOUS ABSCISIC-ACID CONTENT OF WHEAT AND BARLEY GRAINS AND EMBRYOS DURING DEVELOPMENT

PC MORRIS, PC JEWER, DJ BOWLES

    Research output: Contribution to journalComment/debate

    Abstract

    Immature cereal embryo development can be controlled by in vitro culture on media containing ABA, or by media of low osmotic potential. To assess the possible in vivo roles of these factors, endogenous ABA levels and water relations of embryos and grains of wheat (Triticum aestivum L.) and barley (Hordeum vulgare L.) were determined during development. ABA concentrations remained consistent with those required to inhibit precocious germination in vitro of early stage embryos but not of more mature embryos. With increasing maturity, a difference in water potential developed between grain and embryo, suggestive of an in vivo role for water status in controlling the development of the embryo.

    Original languageEnglish
    Pages (from-to)443-446
    Number of pages4
    JournalPlant, Cell and Environment
    Volume14
    Issue number4
    Publication statusPublished - May 1991

    Keywords

    • HORDEUM-VULGARE L
    • INVITRO
    • CEREAL
    • EMBRYO DEVELOPMENT
    • ABSCISIC ACID
    • WATER POTENTIAL
    • GERMINATION
    • BARLEY
    • GERM-AGGLUTININ
    • WHEAT
    • TRITICUM-AESTIVUM L
    • TEMPERATURE

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