Isolation of Diazotrophs from Different Soils of Tanjong Karang Rice Growing Area in Malaysia

Naher, Umme Aminun and Othman, Radziah and Shamsuddin, Zulkifli and Mohd Saud, Halimi and Ismail, Mohd Razi (2009) Isolation of Diazotrophs from Different Soils of Tanjong Karang Rice Growing Area in Malaysia. International Journal of Agriculture and Biology, 11 (5). pp. 547-552. ISSN 1560-8530

Full text not available from this repository.

Official URL: http://www.fspublishers.org/ijab/past-issues/IJABV...

Abstract

Isolation and biochemical characterization of diazotrophs were carried out on seven soil series/types of Tanjong Karang Rice Irrigation Project area. The soil population ranged from 4 × 104 to 2.2 × 106 cfu g-1 soil. Diazotrophic populations were significantly (P<0.01) influenced by soil types, plant age and rice varieties. Higher soil and rhizosphere populations were recorded in Organic Clay and Muck, Bakau, Sedu and Serong soils. The highest root (6.3 × 107) and shoot (2.5 × 107) populations were found in MR219 rice planted in Organic Clay and Muck and Sedu soil series, which had higher C, N and P contents. The highest acetylene reduction assay (ARA) value (1.26 × 10-6 μmoL C2H4 cfu-1 hr1) was found in isolate Sb35. Several diazotrophic strains produced 32 to 69 mg L-1 of indoleacetic acid(IAA). The highest IAA was produced by the diazotrophic strain Sb41 (Corynebacterium sp). Eleven of the diazotrophic strains isolated from root and shoot of the rice varieties were capable of producing cellulose degrading enzyme. Tanjong Karang rice growing area harbor a diverse group of bacteria and most of the isolates belonged to the genera of Rhizobium, Burkholderia and Corynebacterium.

Item Type:Article
Keyword:Diazotrophs, Endophytes, Indoleacetic acid, Acetylene reduction assay, Cellulase activity
Faculty or Institute:Faculty of Agriculture
ID Code:6671
Deposited By: Norhazura Hamzah
Deposited On:20 May 2010 01:15
Last Modified:23 Jul 2010 09:21

Repository Staff Only: item control page

Document Download Statistics

This item has been downloaded for since 20 May 2010 01:15.

View statistics for "Isolation of Diazotrophs from Different Soils of Tanjong Karang Rice Growing Area in Malaysia"


Universiti Putra Malaysia Institutional Repository

Universiti Putra Malaysia Institutional Repository is an on-line digital archive that serves as a central collection and storage of scientific information and research at the Universiti Putra Malaysia.

Currently, the collections deposited in the IR consists of Master and PhD theses, Master and PhD Project Report, Journal Articles, Journal Bulletins, Conference Papers, UPM News, Newspaper Cuttings, Patents and Inaugural Lectures.

As the policy of the university does not permit users to view thesis in full text, access is only given to the first 24 pages only.