𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Interaction of free indole-3-acetic acid and its amino acid conjugates in tomato hypocotyl cultures

✍ Scribed by Volker Magnus; Roger P. Hangarter; Norman E. Good

Publisher
Springer
Year
1992
Tongue
English
Weight
749 KB
Volume
11
Category
Article
ISSN
0721-7595

No coin nor oath required. For personal study only.

✦ Synopsis

The interaction of free IAA and its amino acid conjugates on growth and development of cultured tomato hypocotyl tissue (Lycopersicon esculentum Mill. cv. Marglobe) was studied. In a nutrient medium containing l0 ~mol/L of benzyladenine, free IAA stimulated shoot and root development with little callus proliferation. In contrast, all IAA-amino acid conjugates tested supported mostly callus growth. Simultaneous application of free IAA and its conjugates resulted in the expression of mixed morphogenetic responses (i.e., both vigorous callus growth and organogenesis resulted). Growth kinetics and the effect of temporal exposure of the tissues to the bound and the free auxin suggest that some IAA-amino acid conjugates may specifically influence plant morphogenesis in ways that cannot be easily explained as simply a function of their slow hydrolysis to release free IAA.

πŸ“œ SIMILAR VOLUMES

Uptake and decarboxylation of indole-3-a
Uptake and decarboxylation of indole-3-acetic acid during auxin-induced growth in lupin hypocotyl segments
✍ J. M. BotΓ­a; A. Ortuno; F. Sabater; M. Acosta; J. SΓ‘nchez-Bravo πŸ“‚ Article πŸ“… 1994 πŸ› Springer-Verlag 🌐 English βš– 905 KB

The elongation growth of etiolated hypocotyl segments of lupin (Lupinus albus L.) was stimulated by acid pH (4.6 versus 6.5) and by IAA for periods of up to 4 h. After this time, the segments were unable to grow further. In the presence of an optimal IAA concentration (10 gM), acid pH increased the

Endogenous indoles and the biosynthesis
Endogenous indoles and the biosynthesis and metabolism of indole-3-acetic acid in cultures ofRhizobium phaseoli
✍ A. Ernstsen; G. Sandberg; A. Crozier; C. T. Wheeler πŸ“‚ Article πŸ“… 1987 πŸ› Springer-Verlag 🌐 English βš– 680 KB

Gas chromatography-mass spectrometric analyses of purified extracts from cultures of Rhizobium phaseoli wild-type strain 8002, grown in a non-tryptophan-supplemented liquid medium, demonstrated the presence of indole-3-acetic acid (IAA), indole-3-ethanol (IEt), indole-3-aldehyde and indole-3-methano

Interaction of gibberellic and indole-3-
Interaction of gibberellic and indole-3-acetic acid on root formation in pea (Pisum sativumL.) epicotyl cuttings
✍ U. K. Adhikari; D. Bajracharya πŸ“‚ Article πŸ“… 1978 πŸ› Springer-Verlag 🌐 English βš– 145 KB

Indole-3 acetic acid (IAA) strongly enhanced rooting ofeh ~lated pea epicotyl cuttings while gibberellic acid (GA3) enhanced rooting only slightly. The promoting effects of the hormones appeared not until 14 d after the onset of treatment. When GA~ and IAA were applied together, the initiation of ro

The relationship between diffusible, ext
The relationship between diffusible, extractable and conjugated (base-labile) forms of indole-3-acetic acid in isolated coleoptile tips ofZea maysL.
✍ E. W. Weiler; S. Wischnewski πŸ“‚ Article πŸ“… 1984 πŸ› Springer-Verlag 🌐 English βš– 278 KB

Isolated, 2.5-mm-long coleoptile tips of Zea mays L. cv. Anjou 210 were analyzed for diffusible and tissue-extractable indole-3-acetic acid (IAA) in comparison with the level of base-labile conjugates at various times after excision. The results indicate that base-labile conjugates of IAA do not ser