PJB-2018-645
Dynamics of volatile organic compounds in masson pine (Pinus massoniana Lamb.) seedling needles under drought stress
Wenxuan Quan, Chao Zhao and Guijie Ding
Abstract
The aim of this study is to evaluate whether volatile organic compounds (VOCs) of Masson pine adapted their physiological responses under drought stress or not. The needle length, root length, root/shoot ratio and the VOCs of Masson pine seedlings under drought stress were investigated by comprehensive two-dimensional gas chromatography time of flight mass spectrometry (GC×GC-TOFMS). The results showed that the growth index was enhanced with the increase of stress strength, and the seedling growth, biomass, needle length, and root length were inhibited compared with the well-watered treatment. The amounts of total VOCs under drought stress were increased, the concentration of terpenoids, acids and esters, under drought stress were higher than the well-watered treatment, but the concentration of alcohols and carbonyl compounds was slightly decreased under the moderate drought treatment. Light drought, moderate drought, and severe drought compared with the well-watered treatment, increased the release of VOCs by 49, 50, and 49%, respectively. The results show a key role of the VOCs released in the needles and therefore play a possible key role in drought resistance. This study provides evidence that the needles of Masson pine release more VOCs to adapt to drought conditions.
To Cite this article:
Quan, W., C. Zhao and G. Ding. 2020. Dynamics of volatile organic compounds in masson pine (Pinus massoniana Lamb.) seedling needles under drought stress. Pak. J. Bot., 52(2): DOI: http://dx.doi.org/10.30848/PJB2020-2(31)
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