Arbuscular mycorrhizae and phosphate solubilising bacteria of the rhizosphere of the mangrove ecosystem of Great Nicobar island, India

Kothamasi, David ; Kothamasi, Shalini ; Bhattacharyya, A. ; Kuhad, Ramesh Chander ; Babu, C. R. (2005) Arbuscular mycorrhizae and phosphate solubilising bacteria of the rhizosphere of the mangrove ecosystem of Great Nicobar island, India Biology and Fertility of Soils, 42 (4). pp. 358-361. ISSN 0178-2762

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Official URL: http://www.springerlink.com/content/n62122k328x076...

Related URL: http://dx.doi.org/10.1007/s00374-005-0035-8

Abstract

Mangroves form an important ecosystem of Great Nicobar, a continental island in the Bay of Bengal with luxuriant tropical rainforests. The rhizosphere of the mangrove plants of Great Nicobar was investigated for the presence of arbuscular mycorrhizal fungus (AMF) and phosphate solubilising bacteria (PSB). The soils of the Great Nicobar mangroves were silt–clays and were poor in phosphate content. Five species of AMF belonging to the genus Glomus were isolated. The %AMF colonization in the mangrove plants was between 0 and 17%, and the presence of AMF in the aerenchymatous cortex suggests that the mangrove plants may be aiding in AMF survival by providing oxygen. Two strains of phosphate solubilising Pseudomonas aeruginosa were found in the mangrove soils of Great Nicobar. Phosphate solubilisation by the two isolated strains was almost 70% under in vitro conditions. PSB may play a role in the mangrove ecosystems of Great Nicobar by mobilising insoluble phosphate. The plant roots could pick up the released phosphate directly or with the aid of AMF hyphae.

Item Type:Article
Source:Copyright of this article belongs to Springer.
Keywords:Arbuscular Mycorrhiza; Phosphate Solubilising Bacteria; Mangroves; Great Nicobar; Glomus; Pseudomonas aeruginosa
ID Code:69194
Deposited On:09 Nov 2011 07:58
Last Modified:09 Nov 2011 07:58

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