Journal
SCIENTIA HORTICULTURAE
Volume 172, Issue -, Pages 242-247Publisher
ELSEVIER
DOI: 10.1016/j.scienta.2014.04.018
Keywords
Fruit; HPLC-FD; Melatonin; Pepper; Seed; Seedling
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Funding
- Scientific and Technical Research Council of Turkey (TUBITAK) [110 O 655]
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Melatonin (N-acetyl-5-methoxytryptamine), a well-known animal hormone, was first isolated from bovine pineal gland and, since then, it was discovered in evolutionary distant organisms including bacteria, algae, invertebrates, and finally in higher plants. Although the presence of melatonin in plants seems to be a universal phenomenon, there is still an absence of information on its occurrence in important plant species, one of which is pepper (Capsicum annuum L.). Our objective was to determine the presence of melatonin in different organs (leaves, roots, fruits and seeds) of two pepper cultivars and its variation during various growth stages (germination, seedling, flowering, and harvest) using HPLC-FD. We found very high concentration of melatonin in seedlings at the cotyledon stage (108.6-111.6 ng g(-1) FW) with a progressive decline as the plants matured. Melatonin was also found to accumulate highly in mature seeds, and to varying concentrations in fruits, leaves, and roots depending on the developmental stage, strongly suggesting that melatonin controls these developmental processes. (C) 2014 Elsevier B.V. All rights reserved.
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