scholarly journals The rms1 Mutant of Pea Has Elevated Indole-3-Acetic Acid Levels and Reduced Root-Sap Zeatin Riboside Content but Increased Branching Controlled by Graft-Transmissible Signal(s)

1997 ◽  
Vol 115 (3) ◽  
pp. 1251-1258 ◽  
Author(s):  
C. A. Beveridge ◽  
G. M. Symons ◽  
I. C. Murfet ◽  
J. J. Ross ◽  
C. Rameau
Keyword(s):  
Acetic Acid ◽  
Zeatin Riboside ◽  
Indole 3 Acetic Acid

scholarly journals Reduction of Early Fruit Abscission by Main-branch-girdling in Macadamia Is Related to the Favorable Status of Carbohydrates and Endogenous Hormones

HortScience ◽  
2022 ◽  
Vol 57 (1) ◽  
pp. 40-47
Author(s):  
Wei Hai Yang ◽  
Chao Zhong Lu ◽  
Wei Chen ◽  
Huan Yu Xu
Keyword(s):  
Acetic Acid ◽  
Fruit Set ◽  
Physiological Mechanism ◽  
Zeatin Riboside ◽  
Endogenous Hormones ◽  
Fruit Abscission ◽  
Fruit Drop ◽  
Macadamia Integrifolia ◽  
Horticultural Practice ◽  
Indole 3 Acetic Acid

Fruit abscission occurring severely in the early fruit development affects macadamia yield. Developing effective methods to improve fruit retention is a priority for macadamia cultivation and production. Girdling is an important horticultural practice that has been widely used to increase fruit yield. Previous studies have shown that girdling fails to increase macadamia yield despite enhancing the early fruit set, but few have examined the effect of girdling on its related physiological mechanism. The objective of this study was to investigate the effects of main-branch girdling (MBG) on early fruit retention and also on the levels of carbohydrates and endogenous hormones in the leaves, bearing shoots and fruit of macadamia. Herein, MBG was performed at fruit set using a single-blade knife on 9-year-old macadamia trees (Macadamia integrifolia). Results showed that MBG significantly reduced young fruit drop, concurrent with significant increases in the contents of starch in both the leaves and the bearing shoots and in glucose, fructose, and sucrose levels in the husk and seed. It was suggested that the availability of carbohydrate for fruit retention was improved by MBG. Additionally, MBG increased indole-3-acetic acid (IAA), gibberellin (GA3), and zeatin-riboside (ZR, a type of cytokinin) concentrations and decreased abscisic acid (ABA) contents in the husk and the seed, indicating that MBG reduced the early fruit drop by modifying the balance of endogenous hormones. Therefore, a positive interplay between carbohydrates and endogenous hormones induced by MBG was involved in the reduction of early fruit abscission in macadamia.

Variations in abscisic acid, indole-3-acetic acid and zeatin riboside concentrations in two Mediterranean shrubs subjected to water stress

1996 ◽  
Vol 20 (3) ◽  
pp. 271-277 ◽  
Author(s):  
M. Lopez-Carbonell ◽  
L. Alegre ◽  
A. Pastor ◽  
E. Prinsen ◽  
H. van Onckelen
Keyword(s):  
Acetic Acid ◽  
Abscisic Acid ◽  
Water Stress ◽  
Zeatin Riboside ◽  
Mediterranean Shrubs ◽  
Indole 3 Acetic Acid

Cytokinin-Induced Mitosis in Cultured Explants of Helianthus tuberosus L. Tuber Tissue

1984 ◽  
Vol 11 (2) ◽  
pp. 1 ◽  
Author(s):  
MV Palmer ◽  
BES Gunning
Keyword(s):  
Acetic Acid ◽  
Nuclear Dna ◽  
Relative Effectiveness ◽  
Zeatin Riboside ◽  
Helianthus Tuberosus ◽  
Tuber Tissue ◽  
Cytokinin Treatment ◽  
Synchronous Mitosis ◽  
Indole 3 Acetic Acid ◽  
Parenchyma Tissue

Freshly excised explants of H. tuberosus tuber parenchyma tissue were cultured for up to 42 h in aqueous solutions of 0.6 �M indole-3-acetic acid (IAA; 0.6 �M) or one of four different cytokinins (0.4 or 2.0 �M) in the absence of IAA. All phytohormone treatments were effective in inducing partially synchronous mitosis, but mitosis was not observed in control explants cultured in water alone. IAA induced mitosis earlier and in a greater proportion of cells than did any cytokinin treatment. In most cases, cytokinins were more effective at the higher concentration. The relative effectiveness of the different cytokinins appeared to be benzyladenine > zeatin ≥ kinetin > zeatin riboside. Microdensitometric measurements of relative nuclear DNA levels indicated that DNA synthesis had not occurred in control explants, but was induced by both IAA and cytokinins before the mitotic activity that was observed in the later stages of culture. These responses of freshly excised explants were compared to the effect of zeatin on IAA-induced mitosis in prewashed explants, in which zeatin increased the synchrony of IAA-induced mitosis but not the proportion of cells undergoing mitosis.

Identification of abscisic acid glucose ester, indole-3-acetic acid, zeatin and zeatin riboside in receptacles of pear

1982 ◽  
Vol 21 (5) ◽  
pp. 1079-1082 ◽  
Author(s):  
George C. Martin ◽  
I.M. Scott ◽  
S.J. Neill ◽  
R. Horgan
Keyword(s):  
Acetic Acid ◽  
Abscisic Acid ◽  
Zeatin Riboside ◽  
Glucose Ester ◽  
Indole 3 Acetic Acid
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