Journal
JOURNAL OF EXPERIMENTAL BOTANY
Volume 52, Issue 364, Pages 2241-2242Publisher
OXFORD UNIV PRESS
DOI: 10.1093/jexbot/52.364.2241
Keywords
arbuscular mycorrhiza; drought stress; oxidative stress; SOD
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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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