ISSN:
1573-5028
Keywords:
Brassica napus
;
chitinase
;
leaf senescence
;
plant development
;
PR proteins
;
PR1-a
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Genes that are expressed during leaf senescence in Brassica napus were identified by the isolation of representative cDNA clones. DNA sequence and deduced protein sequence from two senescence-related cDNAs, LSC94 and LSC222, representing genes that are expressed early in leaf senescence before any yellowing of the leaves is visible, showed similarities to genes for pathogenesis-related (PR) proteins: a PR-1a-like protein and a class IV chitinase, respectively. The LSC94 and LSC222 genes showed differential regulation with respect to each other; an increase in expression was detected at different times during development of healthy leaves. Expression of both genes was induced by salicylic acid treatment. These findings suggest that some PR genes, as well as being induced by pathogen infection, may have alternative functions during plant development, for example in the process of leaf senescence.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00049334
