scholarly journals Ethylene Formation in Pea Seedlings; Its Relation to the Inhibition of Bud Growth Caused by Indole-3-Acetic Acid

1968 ◽  
Vol 43 (7) ◽  
pp. 1069-1074 ◽  
Author(s):  
Stanley P. Burg ◽  
Ellen A. Burg
Keyword(s):  
Acetic Acid ◽  
Ethylene Formation ◽  
Pea Seedlings ◽  
Bud Growth ◽  
Indole 3 Acetic Acid

The Route, Control and Compartmentation of Auxin Synthesis

1993 ◽  
Vol 20 (5) ◽  
pp. 527 ◽  
Author(s):  
HM Nonhebel ◽  
TP Cooney ◽  
R Simpson
Keyword(s):  
Amino Acids ◽  
Acetic Acid ◽  
Recent Work ◽  
Aspartate Aminotransferase ◽  
Acid Synthesis ◽  
Pea Seedlings ◽  
Auxin Synthesis ◽  
Aromatic Aminotransferase ◽  
Work Supports ◽  
Indole 3 Acetic Acid

The study of indole-3-acetic acid synthesis has undergone something of a revival recently in an attempt to understand the control of IAA levels. Results are, however, contradictory with three separate hypotheses emerging. Our own work supports older evidence for L-tryptophan as the IAA precursor and appears to simplify the metabolism of tryptophan to IAA. Work comparing incorporation of 2H from 2H2O into IAA, tryptophan, tryptamine and indole-3-pyruvate in tomato shoots showed that the indole-3-pyruvate became labelled at a rate compatible with it being the sole intermediate between tryptophan and indole-3-acetaldehyde. Results also showed that tryptamine was not involved in IAA synthesis although it was present. Indole-3-acetaldoxime was not detected in tomato shoots. An aromatic aminotransferase able to catalyse the synthesis of indole-3-pyruvate has been purified from mung beans. This enzyme was separated from aspartate aminotransferase and is fairly specific for aromatic L-amino acids. Other work, however, has implicated D-tryptophan as a more direct precursor than the L-enantiomer. A D-tryptophan aminotransferase has been isolated from dark grown pea seedlings. Finally, other recent work has indicated the existence of an alternative biosynthetic route to IAA which does not involve tryptophan. These results are reviewed in this paper and the apparent contradictions between them discussed.

Electrochemical mapping of indole-3-acetic acid and salicylic acid in whole pea seedlings under normal conditions and salinity

2018 ◽  
Vol 276 ◽  
pp. 545-551 ◽  
Author(s):  
Li-Jun Sun ◽  
Jia-Jing Zhou ◽  
Jin-Lin Pan ◽  
Yun-Yun Liang ◽  
Zi-Jun Fang ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Salicylic Acid ◽  
Pea Seedlings ◽  
Indole 3 Acetic Acid

Indole-3-methanol—a metabolite of indole-3-acetic acid in pea seedlings

Planta ◽  
1971 ◽  
Vol 97 (2) ◽  
pp. 116-125 ◽  
Author(s):  
Volker Magnus ◽  
Sonja Iskrić ◽  
Sergije Kveder
Keyword(s):  
Acetic Acid ◽  
Pea Seedlings ◽  
Indole 3 Acetic Acid

scholarly journals Correlative Inhibition and Dormancy in Root Buds of Leafy Spurge (Euphorbia esula)

Weed Science ◽  
1987 ◽  
Vol 35 (2) ◽  
pp. 155-159 ◽  
Author(s):  
Scott J. Nissen ◽  
Michael E. Foley
Keyword(s):  
Acetic Acid ◽  
Late Summer ◽  
Growing Season ◽  
Leafy Spurge ◽  
Euphorbia Esula ◽  
Correlative Inhibition ◽  
Napthaleneacetic Acid ◽  
Bud Growth ◽  
Indole 3 Acetic Acid ◽  
Root Buds

Root buds of leafy spurge (Euphorbia esulaL. # EPHES) were found to be quiescent during most of the growing season due to correlative inhibition rather than innate dormancy. Excised root buds taken from plants that were fully flowering showed reduced elongation, indicating a period of innate dormancy. This innate dormancy could be eliminated by chilling plants for 8 days at 4 C. Root buds from plants showing late summer regrowth were no longer innately dormant. IAA (indole-3-acetic acid) and NAA (1-napthaleneacetic acid) completely inhibited the growth of excised leafy spurge root buds at concentrations of 10−3and 10−5M, respectively. A significant increase in root bud elongation was produced by 1 mM TIBA (2,3,5-triiodobenzoic acid) applied to stem and root tissue. These data provide further evidence for the involvement of IAA in correlative control of root bud growth in leafy spurge.

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