Short-term severe drought influences root volatile biosynthesis in eastern white pine (Pinus strobus L)

编号 040037004

推送时间 20221121

研究领域 森林培育 

年份 2022 

类型 期刊 

语种 英语

标题 Short-term severe drought influences root volatile biosynthesis in eastern white pine (Pinus strobus L)

来源期刊 Frontiers in Plant Science

期 第370期

发表时间 20221026

关键词 drought stress;  starch;  terpenoids a-pinene;  limonene;  limonene oxide;  root; 

摘要 Climate change-related drought stress is expected to shift carbon partitioning toward volatile organic compound (VOC) biosynthesis. The effect of drought stress on VOC synthesis remains unknown in several tree species. Therefore, we exposed eastern white pine (Pinus strobus) plants to severe drought for 32 days and performed physiological analysis (chlorophyll content, leaf water content, and root/shoot index), biochemical analysis (non-structural carbohydrates, proline, lipid peroxidation, and antioxidant assay), and total root VOC analysis. Drought stress decreased the relative water and soil moisture contents. Root proline accumulation and antioxidant activity increased significantly, whereas leaf chlorophyll synthesis and fresh weight decreased significantly in drought-treated plants. A non-significant increase in sugar accumulation (leaves and roots), proline accumulation (leaves), antioxidant activity (leaves), and lipid peroxidation (leaves and roots) was observed in drought-treated plants. Drought stress caused a non-significant decline in root/shoot ratio and starch accumulation (leaves and roots) and caused a significant increase in root abscisic acid content. Drought-treated plants showed an increase in overall monoterpene synthesis (16%) and decline in total sesquiterpene synthesis (3%). Our findings provide an overall assessment of the different responses of VOC synthesis to severe water deficit that may help unravel the molecular mechanisms underlying drought tolerance in P. strobus.

服务人员 孙小满

服务院士 尹伟伦

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