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Effects of Ethylenediaminetetraacetic Acid, Auxin and Gibberellic Acid on Phytochrome Controlled Nyctinasty in Albizzia julibrissin
Author(s) -
McEVOY ROBERT C.,
KOUKKARI WILLARD L.
Publication year - 1972
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.1399-3054.1972.tb03557.x
Subject(s) - gibberellic acid , ethylenediaminetetraacetic acid , auxin , phytochrome , biology , botany , incubation , gibberellin , chelation , chemistry , biochemistry , germination , red light , organic chemistry , gene
Nyctinastic closure of Albizzia julibrissin pinnules is inhibited by 5 × 10 −2 M ethylenediaminetetraacetic acid. At least two hours of incubation are required for maximum inhibition and destruction of the phytochrome effect. Concentrations of 10 −3 to 10 −5 M naphthaleneacetic acid reduced the nyctinastic closure of pinnules but not the phytochrome response. Similar results were obtained with indoleacetic acid and gibberellic acid. No appreciable differences in pinnule movements could be attributed to pH. Chelation or the inhibition of ion transport resulting in, or caused by, changes in membrane permeability are suggested as possible mechanisms involved in these effects.