Production of methyl bromide by terrestrial higher plants

被引：88

作者：

Gan, J

Yates, SR

Ohr, HD

Sims, JJ

机构：

[1] USDA ARS, US Salin Lab, Riverside, CA 92507 USA

[2] Univ Calif Riverside, Dept Plant Pathol, Riverside, CA 92521 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 1998年 / 25卷 / 19期

关键词：

D O I：

10.1029/98GL52697

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Methyl bromide (CH3Br) is considered to play an important role in stratospheric ozone depletion, but its sources are currently not well defined. We have observed that Brassica plants can take up Br- from soil, produce CH3Br and release it into the air. Emission of CH3Br was detected from plants grown in natural soils containing 0.06-0.31 mg/kg Br-; the emission increases with increasing soil Br- level. We estimate that cabbage produces 0.4 +/- 0.2 Gg/yr, and rapeseed plants 6.6 +/- 1.8 Gg/yr. Given the ubiquitous distribution of Br- in soil, CH3Br production by terrestrial higher plants is likely a large source for atmospheric CH3Br.

引用

页码：3595 / 3598

页数：4

共 25 条

[1] PURIFICATION AND CHARACTERIZATION OF A NOVEL METHYLTRANSFERASE RESPONSIBLE FOR BIOSYNTHESIS OF HALOMETHANES AND METHANETHIOL IN BRASSICA-OLERACEA [J].