Abstract
Since ethylene application did not induce ripening in detached fruits of the nonripening mutant rin we initiated studies to determine possible involvement of other hormones. We proposed that the lack of ripening in mutant rin tomato fruit may result from a lack of abscisic acid or from excessive endogenous levels of cytokiuin. Application of abscisic acid (3 × 10−5m and 10−3m) to detached fruits of a normal strain (Lycopersicon esculentum Mill. cv. `Rutgers') reduced the time to initiate ripening by about 50%. This acceleration of the onset of ripening appeared not to be due to an increased rate of ethylene production. Abscisic acid did not alter respiration or ethylene production or induce ripening in rin fruit. Ripening in Rutgers fruit was not influenced by treatment with 6-benzyladenine (4.44 × 10−6m, 4.44 × 10−5m or 1.8 × 10−4m). Fruits of the mutant rin showed no response to exogenous BA. However, senescence rates of leaf disks of both Rutgers and rin were significantly inhibited by as little as 10−7m exogenous benzyladenine. The results are discussed in relation to previous studies of the physiology of rin fruits and it is concluded that endogenous levels of ABA and cytokinins do not account for the lack of ripening in rin fruit.
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Selected References
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- Herner R. C., Sink K. C. Ethylene Production and Respiratory Behavior of the rin Tomato Mutant. Plant Physiol. 1973 Jul;52(1):38–42. doi: 10.1104/pp.52.1.38. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Imber D., Tal M. Phenotypic reversion of flacca, a wilty mutant of tomato, by abscisic Acid. Science. 1970 Aug 7;169(3945):592–593. doi: 10.1126/science.169.3945.592. [DOI] [PubMed] [Google Scholar]
- McGlasson W. B., Dostal H. C., Tigchelaar E. C. Comparison of Propylene-induced Responses of Immature Fruit of Normal and rin Mutant Tomatoes. Plant Physiol. 1975 Feb;55(2):218–222. doi: 10.1104/pp.55.2.218. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Mizrahi Y., Dostal H. C., McGlasson W. B., Cherry J. H. Transplantation Studies with Immature Fruit of Normal, and rin and nor Mutant Tomatoes. Plant Physiol. 1975 Jun;55(6):1120–1122. doi: 10.1104/pp.55.6.1120. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Tal M., Imber D. Abnormal Stomatal Behavior and Hormonal Imbalance in flacca, a Wilty Mutant of Tomato: II. Auxin- and Abscisic Acid-like Activity. Plant Physiol. 1970 Sep;46(3):373–376. doi: 10.1104/pp.46.3.373. [DOI] [PMC free article] [PubMed] [Google Scholar]