Role of phosphate solubilizing bacteria on rock phosphate solubility and growth of aerobic rice

Use of phosphate-solubilizing bacteria (PSB) as inoculants has concurrently increased phosphorous uptake in plants and improved yields in several crop species. The ability of PSB to improve growth of aerobic rice (Oryza sativa L.) through enhanced phosphorus (P) uptake from Christmas island rock pho...

Full description

Saved in:
Bibliographic Details
Published in:Journal of environmental biology 2011-09, Vol.32 (5), p.607-607
Main Authors: Panhwar, Q A, Radziah, O, Zaharah, A R, Sariah, M, Razi, I Mohd
Format: Article
Language:English
Subjects:
Aerobiosis
Bacillus
Bacteria - metabolism
Biomass
Chlorophyll - metabolism
Crops
Environmental science
Growth
Inoculation
Islands
Morphology
Oryza - growth & development
Oryza sativa
Phosphate
Phosphates
Phosphates - chemistry
Phosphates - metabolism
Phosphorus
Photosynthesis - physiology
Plant biomass
Plant Leaves - chemistry
Plant Leaves - metabolism
Plant Roots - growth & development
Planting
Plastics
Rice
Rocks
Roots
Seedlings - drug effects
Seedlings - growth & development
Seeds
Soil
Soil solution
Solubility
Solubilization
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Use of phosphate-solubilizing bacteria (PSB) as inoculants has concurrently increased phosphorous uptake in plants and improved yields in several crop species. The ability of PSB to improve growth of aerobic rice (Oryza sativa L.) through enhanced phosphorus (P) uptake from Christmas island rock phosphate (RP) was studied in glasshouse experiments. Two isolated PSB strains; Bacillus spp. PSB9 and PSB16, were evaluated with RP treatments at 0, 30 and 60 kg ha(-1). Surface sterilized seeds of aerobic rice were planted in plastic pots containing 3 kg soil and the effect of treatments incorporated at planting were observed over 60 days of growth. The isolated PSB strains (PSB9 and PSB16) solubilized significantly high amounts of P (20.05-24.08 mg kg(-1)) compared to non-inoculated (19-23.10 mg kg(-1)) treatments. Significantly higher P solubilization (24.08 mg kg(-1)) and plant P uptake (5.31 mg plant(-1)) was observed with the PSB16 strain at the highest P level of 60 kg ha(-1). The higher amounts of soluble P in the soil solution increased P uptake in plants and resulted in higher plant biomass (21.48 g plant(-1)). PSB strains also increased plant height (80 cm) and improved root morphology in aerobic rice. The results showed that inoculation of aerobic rice with PSB improved phosphate solubilizing activity of incorporated RP.
ISSN:0254-8704
2394-0379