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Rooting, growth and ethylene evolution of pea cuttings in response to chloroindole auxins
Author(s) -
Ahmad A.,
Andersen A. S.,
Engvild K.
Publication year - 1987
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.1399-3054.1987.tb01956.x
Subject(s) - auxin , apical dominance , cutting , pisum , ethylene , shoot , leafy , ethylene diamine , biology , horticulture , sativum , botany , chemistry , biochemistry , nuclear chemistry , gene , catalysis
In pea cuttings ( Pisum sativum L. cv. Alaska) we measured shoot and root growth and ethylene production in response to 4‐chloroindole‐3‐acetic acid (4‐CI‐IAA) or 4,6‐dichloroindole‐3‐acetic acid (4,6‐Cl 2 ‐IAA). Leafy cuttings treated basally with either of the chlorinated auxins in high concentrations showed permanent epinasty, loss of apical growth and dominance resulting in the outgrowth of laterals from the lower‐most axillary bud. The naturally occurring 4‐CI‐IAA was a better root promoter than the synthetic 4,6‐Cl 2 ‐IAA which inhibited rooting. Both chloroindole auxins induced very high ethylene evolution, which lasted much longer than the ethylene evolution after IAA treatment.