Application of Digital Image Analysis System for Fine Evaluation of Varietal Differences and the Role of Ethylene in Visible Petal Senescence of Morning Glory |
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Authors: | Yoshihito Shinozaki Takanari Tanabata Isao Ogiwara Tetsuya Yamada Motoki Kanekatsu |
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Institution: | (1) Department of Plant Production, United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu Tokyo, 183-8509, Japan;(2) National Institute of Agrobiological Sciences, Tsukuba Ibaraki, 305-8602, Japan; |
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Abstract: | We detected differences in both onset and progression of visible petal senescence among morning glory cultivars by application
of a digital image analysis system. The system is based on semiautomated time-lapse measurement of corolla areas. The system
could also be applied to evaluate the effects of ethylene and its inhibitor on visible petal senescence. Both onset and progression
of visible petal senescence were accelerated by ethylene treatment in all six cultivars tested. Treatment with aminooxyacetic
acid (AOA), an ethylene biosynthesis inhibitor, prolonged time to onset of visible petal senescence in three of the six tested
cultivars. In contrast, AOA treatment had no effect on duration of visible petal senescence in any tested cultivars. These
data suggested differences among morning glory cultivars in the role of endogenous ethylene in controlling onset of visible
petal senescence. In addition, we propose a new application of image analysis to fine quantification of time-lapse changes
in the shape of plant organs. |
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