In:
Physiologia Plantarum, Wiley, Vol. 68, No. 3 ( 1986-11), p. 426-430
Abstract:
Indole acetic acid (IAA). abscisic acid (ABA), and zeatin plus zeatin riboside (Z + ZR) were determined daily in cuttings of Lycopersicon esculentum Mill. cv. Craigella (C) and the Craigella Lateral Suppressor (CLS) mutant during the first 5 days of the root‐forming process. A solid‐phase enzyme immunoassay using specific anti‐hormone antibodies was used following a one‐step HPLC purification procedure. The hormone measurements were made in cuttings divided into 4 parts. The main variations occurred in the terminal bud and in the basal part of the hypocotyl of the two tomato varieties, i.e. significant IAA and ABA increases during the first 2 days followed by a more or less fast return to the initial values at day 4 or 5. This is probably due to the ablation of the root system. Z + ZR levels dramatically decreased in the basal part of the Craigella hypocotyl 1 day after cutting. Contrary to CLS, C hypocotyls recovered the initial high levels when roots regenerated (day 5). This is probably linked to the greater ability of roots to produce cytokinins in C plants than in CLS ones. The first step of root formation (reactivation of the pericyclic cells and formation of root primordia) corresponded to a high IAA/Z + ZR ratio in the root‐forming tissue, whereas the second step (elongation of young roots) was characterized by a low ratio with low levels of hormones.
Type of Medium:
Online Resource
ISSN:
0031-9317
,
1399-3054
DOI:
10.1111/ppl.1986.68.issue-3
DOI:
10.1111/j.1399-3054.1986.tb03376.x
Language:
English
Publisher:
Wiley
Publication Date:
1986
detail.hit.zdb_id:
208872-1
detail.hit.zdb_id:
2020837-6
SSG:
12
Permalink