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Water stress and root formation in pea cuttings
Author(s) -
RASMUSSEN SIGGA,
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.tb03235.x
Subject(s) - cutting , abscisic acid , sativum , pisum , irradiance , horticulture , biology , botany , biochemistry , gene , physics , quantum mechanics
Cuttings from eleven day old pea plants ( Pisum sativum L. cv. Alaska) grown under either 16 or 38 W m −2 PAR were treated for 24 h with solutions of abscisic acid (ABA). After rooting for 13 days in 16 W m −2 irradiance under mist it was found that 10 −5 to 10 −4 M ABA stimulated rooting (root numbers) while higher concentrations apparently were inhibitory. However, the extension of the rooting period to 17 days indicated that this inhibition was due only to a delay of root emergence. Cuttings from low irradiance took up much less solution than those from high irradiance, giving the appearance of higher sensitivity to ABA. The relative increase of root numbers by optimal ABA tissue concentrations was higher in the cuttings from high irradiance than in those from low irradiance.