期刊
BIOCHEMICAL SYSTEMATICS AND ECOLOGY
卷 37, 期 6, 页码 723-730出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bse.2009.12.012
关键词
Cuticular waxes; Dehydration/hydration cycle; Desert moss (Syntrichia caninervis Mitt.); Leaf aging; Alcohols; Alkanes; Fatty acids; Hexadecanoic acid; Oleic acid; Octadecanoic acid
资金
- National Natural Science Foundation of China [30470917]
- Science and Technology Commission of Shanghai Municipality [08DZ0504700]
- Shanghai Jiao Tong University [YG2009MS23]
The structures and composition of cuticular waxes deposited on the leaves of a typical desert moss, Syntrichia caninervis, were investigated. The wax crystals deposited on leaves shifted with leaf aging. The results of chemical analysis showed the main chemical components of the moss wax were fatty acids, alcohols and alkanes. Leaf aging increased the content of cuticular wax and the percentage of very long chain components, from 1150 mu g g(-1) DW and 13.6% in younger leaves to 2640 mu g g(-1) DW and 37.2% in aged leaves, respectively. Dehydration/hydration also augmented the wax content by 35.17% in juvenile leaves and by 1900% in lab-cultivated leaves after three-cycle treatments. Synthesis of hexadecanoic acid and tetracosane were predicted to be the first step of wax accumulation. The responses of cuticular waxes in crystal structure and chemical composition were recommended as a biomonitor for assessing the shift of ecological and environmental quality. (c) 2009 Elsevier Ltd. All rights reserved.
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