期刊
JOURNAL OF EXPERIMENTAL BOTANY
卷 52, 期 364, 页码 2241-2242出版社
OXFORD UNIV PRESS
DOI: 10.1093/jexbot/52.364.2241
关键词
arbuscular mycorrhiza; drought stress; oxidative stress; SOD
In the present study three cDNA fragments were cloned using degenerate primers for Mn-sod genes and PCR: two showed a high degree of identity with Mn-sods from plants and the third with Fe-sod. Arbuscular mycorrhizal (AM) symbiosis down-regulated their expression pattern under well-watered conditions. In contrast, AM symbiosis in combination with drought stress considerably increased the expression of the Mn-sod II gene and this correlated well with plant tolerance to drought. These results would suggest that mycorrhizal protection against oxidative stress caused by drought may be an important mechanism by which AM fungi protect the host plant against drought.
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