ISSN:
1399-3054
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Biology
Notes:
Changes in the rooting capativity and indole-3-acetic acid (IAA)-oxidase activity of bean (Phaseolus vulgaris L. cv. Contender) cuttings treated with 2-, 3-, or 4-hydroxy-benzaldehyde (2-, 3- and 4-OH-Bal) were monitored in parallel with the chemical changes undergone by these aldehydes in the cuttings. All three compounds enhanced rooting. 2-OH-Bal was the most effective and acted synergistically with 10μM IAA at 0.4 mM. 3- and 4-OH-Bal also stimulated rooting and acted additively with IAA. The position of the hydroxyl group, thus, clearly influences the rooting activity of hydroxy-benzaldehydes. The action of 2-OH-Bal appeared to be due to its inhibition of the IAA-oxidase activity. All the aldehydes were metabolized chiefly by reduction: after 4 h of treatment, HPLC showed almost all to have been converted to the corresponding alcohol or acid, with an alcohol/acid ratio of 10 for 3- and 4-OH-Bal and 20 for 2-OH-Bal. It is possible that the oxidative effect of the aldehydes may benefit the early stages of root formation.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1399-3054.1991.tb02474.x
