ISSN 2736-1756
Advanced Journal of Microbiology Research Vol. 2013
Available online at http://internationalscholarsjournals.org/journal/ajmr
© 2013 International Scholars Journals
Full Length Research Paper
Effects of rockphosphate and arbuscular mycorrhizal fungi on growth and nutrition of Sesbania sesban and Gliricidia sepium
Fatimata Ndiaye1,2*, Anicet Manga1,3, Gnagna Diagne- Leye1, Samba Arona Ndiaye Samba2 and Tahir Abdoulaye Diop1,3
1Laboratoire de Biotechnologies des Champignons, Département de Biologie Végétale, Faculté des Sciences et
Techniques, Université Cheikh Anta Diop, B. P. 5005, Dakar, Sénégal.
2Laboratoire National de Recherches sur les Productions Végétales, Institut Sénégalais de Recherches Agricoles, Bel-
Air, B. P. 3120, Dakar Sénégal.
3Laboratoire Commun de Microbiologie IRD/ ISRA/UCAD, Centre de Recherches de Bel-Air, B. P. 1386, Dakar,
Sénégal.
Accepted 11 September, 2012
Abstract
A greenhouse experiment was conducted to evaluate the effects of different indigenous arbuscular mycorrhizal (AM) fungi on the mobilization of phosphorus from Senegalese natural rock phosphate (NRP) for growth of Gliricidia sepium and Sesbania sesban seedlings. Levels of tested NRP were compatible with high AM fungal proliferation but modified pattern of root colonization according to plant cultivar and fungal species. NRP applications and AM inoculation positively stimulated growth parameters and shoot mineral mass of G. sepium and S. sesban after four months cultivation. More than 200% of weight gains in S. sesban were recorded with all AM fungi combined with 600 or 800 mg NRP. With Gliricidia, only Glomus aggregatum in presence with these high NRP levels induced the same tendency. Glomus fasciculatum enhanced twice height growth of Sesbania in presence of 400, 600 and 800 mg NRP. The impact of dual application of AM fungi and NRP on nutritional content was more marked with Sesbania than in Gliricidia seedlings.
Key words: Rock Phosphate, AM fungi, Ghricidia sepium, Sesbania sesban.