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Lipo‐oligosaccharides of Rhizobium induce infection‐related early nodulin gene expression in pea root hairs
Author(s) -
Horvath Beatrix,
Heidstra Renze,
Lados Miklos,
Moerman Marja,
Spaink Herman P.,
Promé JeanClaude,
Kammen Albert,
Bisseling Ton
Publication year - 1993
Publication title -
the plant journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.058
H-Index - 269
eISSN - 1365-313X
pISSN - 0960-7412
DOI - 10.1046/j.1365-313x.1993.04040727.x
Subject(s) - rhizobium , root hair , biology , gene expression , gene , microbiology and biotechnology , root nodule , botany , symbiosis , genetics , bacteria
This paper shows that lipo‐oligosaccharides (Nod factors) synthesized by Rhizobium bacteria elicit the induction of infection‐related early nodulin genes ( PsENOD5 and PsENOD12 ) in pea root hairs. R. leguminosarum bv. viciae secretes a mixture of Nod factors containing a C18 fatty acid chain with 4 (C18:4) or 1 double bond (C18:1). Purified Nod factors harbouring either a C18:4 or a C18:1 acyl moiety induce the expression of the pea early nodulin genes, PsENOD5 and PsENOD12 , but the kinetics of induction are different. The expression of both early nodulin genes is induced in a transient manner by the purified Nod factors while a mixture of the Nod factors extends the period during which these genes are expressed. In spite of the host‐specific nature of the infection process, heterologous Nod factors of R. meliloti also induce the expression of PsENOD5 and PsENOD12 genes, though with a marked delay compared with the homologous compounds.