אסיף מאגר המחקר החקלאי

The early nodulin enod40 is induced by; and also promotes arbuscular mycorrhizal root colonization

Year:

2002

Source of publication :

Authors :

Volume :

60

Co-Authors:

Sinvany, G., Institute of Field and Garden Crops, ARO, Volcani Center, Bet Dagan, 50250, Israel, Faculty of Agricultural, Food and Environmental Quality Sciences, Hebrew University of Jerusalem, Rehovot, 76100, Israel
Kapulnik, Y., Institute of Field and Garden Crops, ARO, Volcani Center, Bet Dagan, 50250, Israel
Wininger, S., Institute of Field and Garden Crops, ARO, Volcani Center, Bet Dagan, 50250, Israel
Badani, H., Institute of Field and Garden Crops, ARO, Volcani Center, Bet Dagan, 50250, Israel
Jurkevitch, E., Faculty of Agricultural, Food and Environmental Quality Sciences, Hebrew University of Jerusalem, Rehovot, 76100, Israel

Facilitators :

Link :

Abstract:

Expression of Tenod40, a tobacco (Nicotiana tabacum cv. Xanthi nc) homologue of Msenod40, a gene expressed early during alfalfa (Medicago sativa) nodule development, was significantly and consistently increased (about three-fold) in tobacco roots of plants grown in sand and colonized by the arbuscular mycorrhizal (AM) fungus Glomus intraradices, as compared to non-mycorrhizal controls. In alfalfa (Medicago sativa cv. Gilboa), a similar induction of Msenod40 expression was also detected in mycorrhizal vs. non-mycorrhizal roots. In the same experimental system, the application of the cytokinin 6-benzylaminopurine to non-mycorrhizal roots resulted in a similar increase in Msenod40 expression. A significantly higher incidence of AM fungal colonization (vesicles per cm of root) in M. sativa cv. Gilboa roots was observed following application of luteolin-induced Sinorhizobium meliloti exudates as compared to plants amended with non-induced exudates. Moreover, overexpression of the Mtenod40 gene in Medicago truncatula plants under the control of a 35S constitutive promoter resulted in significantly enhanced colonization as compared to non-transgenic plants. The fact that enod40 gene expression was increased both in a legume and in a non-legume during colonization by the AM fungus, and that colonization levels were higher in enod40-overexpressing transgenic plants strongly suggests that this gene is involved in the establishment of the fungal partner in its host. © 2002 Elsevier Science Ltd.

Note:

Related Files :

תוכן קשור

More details

You may also be interested in