Chloride methylation by plant pectin: An efficient environmentally significant process

被引：148
作者：
Hamilton, JTG
McRoberts, WC
Keppler, F
Kalin, RM
Harper, DB
机构：
[1] Dept Agr & Rural Dev No Ireland, Belfast BT9 5PX, Antrim, North Ireland
[2] Queens Univ Belfast, Belfast BT9 5PX, Antrim, North Ireland
[3] Queens Univ Belfast, Questor Res Ctr, Belfast BT9 5AG, Antrim, North Ireland
[4] Queens Univ Belfast, Environm Engn Res Ctr, Belfast BT9 5AG, Antrim, North Ireland
来源：
SCIENCE | 2003年 / 301卷 / 5630期
关键词：
D O I：
10.1126/science.1085036
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Atmospheric chloromethane (CH3Cl) plays an important role in stratospheric ozone destruction, but many uncertainties exist regarding the strengths of its sources and sinks and particularly regarding the processes generating this naturally occurring gas. Evidence is presented here that CH3Cl is produced in many terrestrial environments by a common mechanism. Abiotic conversion of chloride to CH3Cl occurs readily in plant material, with the widespread plant component pectin acting as a methyl donor. Significant CH3Cl emissions from senescent and dead leaves were observed at ambient temperatures; those emissions rose dramatically when temperatures increased. This ubiquitous process acting in terrestrial ecosystems and during biomass burning could contribute the bulk of atmospheric CH3Cl.
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收藏
页码：206 / 209
页数：4
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