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Comparison among the isozyme profiles associated with ethrel treatments of leaves, and with senescence and plum pox virus infection in Chenopodium foetidum
Author(s) -
Visedo Guillermo,
FernándezPiqueras José,
García Juan A.
Publication year - 1991
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1991.tb01296.x
Subject(s) - senescence , biology , chenopodium , isozyme , ethephon , tobacco mosaic virus , ethylene , botany , wilting , botrytis cinerea , potyviridae , virus , horticulture , plant virus , potyvirus , virology , enzyme , biochemistry , weed , microbiology and biotechnology , catalysis
Changes in the isozyme profiles of peroxidases (POX, EC 1.11.1.7), glutamate oxaloacetate transaminase (GOT, EC 2.6.1.1) and esterases (EST, EC 3.1.1.1) have been studies in leaves of Chenopodium foetidum S. treated with ethrel. Different systems for administration of the ethrel led to different responses. In intact plants, treatment of the complete surface of leaves or local administration by pricking the leaves induced senescence and wilting as well as quick changes, characteristic of ageing, in the isozyme patterns of the treated leaves. Isolated leaves treated with ethrel in vitro also showed a senescence response, but this was followed by a necrosis that displayed an isozyme pattern highly similar to that of necrotic lesions induced by plum pox virus (PPV) infection. An accelerated senescence process seems to be involved in the induction of changes in the isozyme patterns of expression during the hypersensitive response of Chenopodium foetidum to PPV infection, and ethylene could participate in this process. However, other factors may also be required for necrotization.