REGULATION OF THE EXPRESSION OF PLANT DEFENSE GENES

Citation
Jf. Bol et al., REGULATION OF THE EXPRESSION OF PLANT DEFENSE GENES, Plant growth regulation, 18(1-2), 1996, pp. 87-91
Citations number
21
Categorie Soggetti
Plant Sciences
Journal title
ISSN journal
01676903
Volume
18
Issue
1-2
Year of publication
1996
Pages
87 - 91
Database
ISI
SICI code
0167-6903(1996)18:1-2<87:ROTEOP>2.0.ZU;2-O
Abstract
The hypersensitive response of plants to infection by pathogens is ass ociated with the induction of the expression of genes encoding pathoge nesis-related (PR) proteins and the development of a systemic acquired resistance of the plant to viruses, fungi and bacteria. The PR genes induced in Samsun NN tobacco mosaic virus (TMV) have been classified i nto five groups, each encoding acidic extracellular and basic vacuolar proteins. In addition to induction by TMV, many PR genes are induced by treating the plant with salicylic acid (SA). Genes encoding acidic PRs are systemically induced upon TMV infection whereas genes encoding basic PRs are not. In contrast to the genes encoding acidic PRs, the genes encoding basic PRs are induced by ethylene and wounding. Cis-act ing regulatory elements involved in the co-ordinate induction of PR ge nes by TMV and SA have been mapped in most detail in the PR-1a promote r. This promoter contains a number of elements that bind a GT-1 like t ranscription factor with different affinities. To study the role of et hylene in the induction of PR gene expression, plants have been transf ormed with sense and antisense constructs of tobacco cDNAs encoding AC C-synthase and/or ACC-oxidase.