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Rapid changes of induced volatile organic compounds in Pinus massoniana |
| REN Qin1, JIN Youju2, HU Yongjian2, CHEN Huajun2, LI Zhenyu3 |
| 1.College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China; Inner Mongolia Jining Teachers Advanced College, Jining 012000, China; 2.College of Biological Sciences and Biotechnologies, Beijing Forestry University, Beijing 100083, China; 3.College of Resources and Environment, Beijing Forestry University, Beijing 100083, China |
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Abstract Using the thermal-desorption cold trap gas chromatography/mass spectrometer (TCT-GC-MS) technique, the composition and relative contents of volatile compounds were analyzed in undamaged (control), insect-damaged (ID) and artificially-damaged (AD) leaves of Pinus massoniana in field at different times and levels of damage. Results showed that although volatile substances were highly released earlier in AD leaves plants, they were significantly less abundant in AD than in ID leaves treatments. Also, the damage level considerably influenced the changes of induced volatile products from leaves. Compared with the control, the emission rate of camphene, β-pinene, phellandrene, caryophyllene and (E)-farnesene was high after 1 h in 25%–40% ID-affected leaves, whereas that of tricyclene, myrcene, camphene, β-Pinene, phellandrene and caryophyllene reached its maximum after 24 h in 60%–75% ID-affected leaves. In the same manner, some volatile compounds in the AD leaves treatment displayed their peaks just after 1 h, but others after 24 h. The AD and ID leaves at the damage level of 25%–40% did not exhibit an obvious regularity with time; however, in 60%–75% AD leaves, peaks of volatile substances were attained after 1 or 2 h. Our results also showed that the relative content of β-pinene increased and was higher in damaged than control plants. β-pinene plays an important role in inducing the insect resistance of P. massoniana trees.
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Issue Date: 05 December 2007
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