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Galactolipid depletion in blast fungus‐infected rice leaves
Author(s) -
Zhou L.,
Zhang Y.,
Rao L.,
Cao Y.,
Peng Y.
Publication year - 2008
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.2008.00266.x
Subject(s) - galactolipid , galactolipids , biology , fungus , biochemistry , lignin , botany , gene , phospholipid , membrane , chloroplast
This research focuses on galactolipid depletion in blast fungus‐infected rice leaves. Two major galactolipids, monogalactosyldiacylglycerol (MGDG) and digalactosyldiacylglycerol (DGDG), from rice leaves were isolated and purified. The chemical structure of MGDG was identified as 1,2‐dilinolenyl‐3‐ O ‐β‐ d ‐galactopyranosyl‐ sn ‐glycerol, and that of DGDG as 1,2‐dilinolenyl‐3‐ O ‐[α‐ d ‐galactopyranosyl‐(1→6)‐ O ‐β‐ d ‐galactopyranosyl]‐ sn ‐glycerol. Both the MGDG and DGDG content in the incompatible blast fungus race‐infected leaves decreased more than those in the compatible blast fungus race‐infected leaves during the infection process. Active oxygen species had the ability to peroxygenate and de‐esterify MGDG or DGDG in vitro , suggesting that active oxygen species play an important role in galactolipid depletion during the process of rice blast fungus invasion. Other possible functions of rice galactolipids during disease resistance are also discussed.