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Changes in water relations and endogenous abscisic acid content of wheat and barley grains and embryos during development
Author(s) -
MORRIS P. C.,
JEWER P. C.,
BOWLES D. J.
Publication year - 1991
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/j.1365-3040.1991.tb00955.x
Subject(s) - abscisic acid , embryo , germination , hordeum vulgare , endogeny , biology , embryogenesis , embryo culture , in vivo , in vitro , agronomy , botany , poaceae , microbiology and biotechnology , biochemistry , gene
. 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.