Aldehyde volatiles emitted in succession from mechanically damaged leaves of poplar cuttings |
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Authors: | Zeng-hui Hu Ying-bai Shen You-qing Luo Fan-yi Shen Hai-bo Gao Rong-fu Gao |
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Institution: | (1) Key Laboratory for Genetics and Breeding of Forest Trees and Ornamental Plants (Ministry of Education), College of Biological Sciences and Technology, Beijing Forestry University, Beijing, 100083, China;(2) Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China; |
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Abstract: | Plant aldehydes are volatiles necessary to defenses against environmental stress. To explore their emissions in response to
wounding, we performed gas chromatography-mass spectrometry (GC-MS) on cuttings from poplar (Populus simonii×P. pyramidalis ‘Opera 8277’) that were mechanically damaged to mimic herbivore attack. We detected 16 aldehydes, including 11 linear saturated
aldehydes, 3 linear unsaturated aldehydes, and 2 non-linear aldehydes. Emissions of these aldehydes were clearly enhanced
by such treatment, and exhibited a similar pattern of change, i.e., increasing in the first 2 h, then sharply decreasing before
rising again at about 12 h. Two release peaks for these aldehydes were observed. Therefore, we propose two pathways for the
mediation of aldehyde emissions following damage. The first peak may represent emissions from plant storage pools, whereas
the second release peak might result from greater formationde novo through an activated synthesis pathway. |
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Keywords: | aldehyde emissions emission mechanism mechanical damage poplar (Populus simonii×P pyramidalis ‘ Opera 8277’ ) cuttings |
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