Journal
ACTA BIOCHIMICA ET BIOPHYSICA SINICA
Volume 36, Issue 11, Pages 773-779Publisher
OXFORD UNIV PRESS
DOI: 10.1093/abbs/36.11.773
Keywords
phytoplasma; garland chrysanthemum Chrysanthemum coronarium; pathogenesis-related proteins; thaumatin; osmotin
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Soluble proteins extracted from leaves, apical shoots, axillary shoots, and stems of garland chrysanthemum plants infected by onion yellows phytoplasma were analyzed by two-dimensional gel electrophoresis. Computerized matching analysis revealed that at least six soluble proteins were accumulated specifically in phytoplasma-infected garland chrysanthemum. N-terminal amino acids sequences of these soluble proteins, determined by Edman degradation, shared high sequence similarities with those of pathogenesis-related type-5 (PR-5) proteins such as tobacco thaumatin-like protein. Accumulation of these six proteins was also found in garland chrysanthemum plants infected by other phytoplasmas. These results demonstrate that phytoplasmal infection induces the accumulation of PR-5 like proteins in garland chrysanthemum plants.
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