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Abscisic acid and osmotic stress or slow drying independently induce desiccation tolerance in mutant seeds of Arabidopsis thaliana
Author(s) -
Ooms Jaap J.J.,
Veen Renske,
Karssen Cees M.
Publication year - 1994
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1994.tb08843.x
Subject(s) - abscisic acid , desiccation , arabidopsis thaliana , dehydration , mutant , desiccation tolerance , osmotic shock , arabidopsis , endogeny , biology , botany , osmotic pressure , freezing tolerance , microbiology and biotechnology , biochemistry , chemistry , gene
Action of endogenous abscisic acid (ABA) is absent in the ABA‐deficient and ‐insensitive double mutant ( aba‐1abi3–1 ) seeds of Arabidopsis thaliana . Thus, responses to osmotic stress and dehydration can be studied without interference of endogenous ABA. Seeds of this double mutunt are viable hut desiceation‐intolerant. However, desiccation tolerance can he induced by either (1) slow dehydration of immature seeds; (2) treatment of immature seeds with osmotica or; (31 due to the leakiness of the ABA‐insensitivty mutation, by application of exogenous ABA. Consequently it is concluded that either ABA or osmotic‐ or dehydration‐stress and related gene expression meets the minimal requirements for acquisition of desiccation tolerance in seeds of Arabidopsis thalianna .