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Water stress and root formation in pea cuttings
Author(s) -
RAJAGOPAL VELAMOOR,
ANDERSEN A. SKYTT
Publication year - 1980
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.1399-3054.1980.tb03236.x
Subject(s) - abscisic acid , pisum , cutting , ethylene , sativum , horticulture , peg ratio , osmotic shock , chemistry , botany , water stress , biology , biochemistry , finance , gene , economics , catalysis
Eleven day old pea plants ( Pisum sativum L. cv. Alaska), grown at 16 W m −2 or 38 W m −2 were stressed with different concentrations of polyethyleneglycol (PEG): –3.0 (mild), –6.4 (moderate) or –13.9 bar (severe) for 2, 4 or 6 h. The leaf osmotic potential, ψ π , and the endogenous abscisic acid (ABA) level and ethylene production were determined at the end of the stress treatment. The ψ π decreased with stress treatments. The reduction was greater at 38 W m −2 than at 16 W m −2 ; severely‐stressed plants had less ABA content than those under moderate or mild stress. Ethylene production was higher with the 2 h stress treatment than the non‐stressed only at 38 W m −2 . Prolongation of stress to 6 h decreased the ABA level and also ethylene production under both levels of irradiance. The relationship between the changes in ABA and ethylene and the adventitious root formation in pea cuttings is discussed.