TY - JOUR

T1 - 短期干旱胁迫对马尾松排放挥发性有机物的影响

AU - Li, Ling Yu

AU - Guenther, Alex B.

AU - Gu, Da Sa

AU - Seco, Roger

AU - Nagalingam, Sanjeevi

PY - 2020

Y1 - 2020

N2 - To explore the impact of drought on BVOC emissions, dynamic enclosure system and TD-GC-TOFMS were used to conduct laboratory measurements of BVOC emission from Pinus massoniana under short-term drought stress. The changes in emission rates and composition were analyzed quantitatively. The results showed that emission of isoprene was inhibited under drought stress, with a drop of around 50% in emission rate. Monoterpene and sesquiterpene emission rates were enhanced to 137.85 μg/(m2•h) and 0.98 μg/(m2•h) which were 2.9 and 2.0 times as high as those without stress, respectively. Except trans-α-bergamotene, emissions of all the detected monoterpene and sesquiterpene compounds were promoted under drought stress. Those emission rates were 1.3~42.4 times as high as those without stress. Among them, 3-carene emission had the most sensitive response to drought stress, while α-fenchene, α-phellandrene, and trans-caryophyllene had the lowest sensitivity. Under drought stress, the emission compositions of monoterpene and sesquiterpene were changed, but the dominant compounds remained the same. The main components of monoterpene were α-pinene, sabinene, and β-pinene, accounting for 48%, 17%, and 17% in the total monoterpene emissions, respectively. Trans-caryophyllene and longifolene dominated sesquiterpene emissions with contributions of 57% and 34%, respectively. © 2020, Editorial Board of China Environmental Science. All right reserved.

AB - To explore the impact of drought on BVOC emissions, dynamic enclosure system and TD-GC-TOFMS were used to conduct laboratory measurements of BVOC emission from Pinus massoniana under short-term drought stress. The changes in emission rates and composition were analyzed quantitatively. The results showed that emission of isoprene was inhibited under drought stress, with a drop of around 50% in emission rate. Monoterpene and sesquiterpene emission rates were enhanced to 137.85 μg/(m2•h) and 0.98 μg/(m2•h) which were 2.9 and 2.0 times as high as those without stress, respectively. Except trans-α-bergamotene, emissions of all the detected monoterpene and sesquiterpene compounds were promoted under drought stress. Those emission rates were 1.3~42.4 times as high as those without stress. Among them, 3-carene emission had the most sensitive response to drought stress, while α-fenchene, α-phellandrene, and trans-caryophyllene had the lowest sensitivity. Under drought stress, the emission compositions of monoterpene and sesquiterpene were changed, but the dominant compounds remained the same. The main components of monoterpene were α-pinene, sabinene, and β-pinene, accounting for 48%, 17%, and 17% in the total monoterpene emissions, respectively. Trans-caryophyllene and longifolene dominated sesquiterpene emissions with contributions of 57% and 34%, respectively. © 2020, Editorial Board of China Environmental Science. All right reserved.

KW - BVOCs

KW - Drought stress

KW - Plant

KW - Soil moisture

KW - Terpenoid

KW - Volatile organic compounds

U2 - 10.19674/j.cnki.issn1000-6923.2020.0422

DO - 10.19674/j.cnki.issn1000-6923.2020.0422

M3 - Tidsskriftartikel

AN - SCOPUS:85093649893

VL - 40

SP - 3776

EP - 3780

JO - Zhongguo Huanjing Kexue/China Environmental Science

JF - Zhongguo Huanjing Kexue/China Environmental Science

SN - 1000-6923

IS - 9

ER -