Abstract: Methane（CH4）is an important atmospheric trace gas，contributing to global warming and atmospheric redox chemistry. Traditionally, the only known biologial source of methane was a limited group of obligate anaerobic prokaryotes called methanogens. However, a recent research repoted aerobic CH4 emission from plants by an unrecognized,nonmicrobial mechanism. In this paper the study of methane emissions from plants was reviewed,and pointed out the directions for future research work in this field.

Key words: Methane