Role of plant growth-promoting Rhizobacteria in influencing the early growth of Pueraria phaseoloides - strain and soil factors Malaysia

Ikram A., . and Karim M.Z., . and Sudin M.N., . and Napi D., . Role of plant growth-promoting Rhizobacteria in influencing the early growth of Pueraria phaseoloides - strain and soil factors Malaysia. pp. 48-55. ISSN 0127-7065

The common plantation legume Pueraria phaseoloides was used to evaluate growth stimulation by the plant growth-promoting rhizobacteria (PGPR) strain 7NSK2 in 20 soils and by strains TL3 34-13 1-102 and 1-4E1 in six soils in glasshouse pot experiments. The PGPR strains showed strong interaction with soils in affecting shoot dry weight (DW) yields after five weeks growth. Strain 7NSK2 increased shoot DW significantly in 12 of the 20 soils tested but significantly depressed yields in one soil. In another experiment growth responses to PGPR inoculation occurred only in three of the six soils tested. Relating features of the soil (physical chemical and biological) to shoot DW responses from inoculation in a multiple regression only showed total soil phosphorus (P) to be the most significant variable followed by lesser significant relationships with total manganase (Mn) exchangeable Calcium (Ca) and Aluminium (Al). This could arise from indirect rather than direct relationships since the variables accounted for only 50 of the variance. The results that other variables were either not measured or unknown and that may include control of deleterious rhizobacteria or some undiagnosed minor pathogens in the rhizophere. The findings are discussed in relation to the need to test selected PGPR strains over a range of field soils and sites prior to their agronomic use as a beneficial crop inoculants

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Abstract

The common plantation legume Pueraria phaseoloides was used to evaluate growth stimulation by the plant growth-promoting rhizobacteria (PGPR) strain 7NSK2 in 20 soils and by strains TL3 34-13 1-102 and 1-4E1 in six soils in glasshouse pot experiments. The PGPR strains showed strong interaction with soils in affecting shoot dry weight (DW) yields after five weeks growth. Strain 7NSK2 increased shoot DW significantly in 12 of the 20 soils tested but significantly depressed yields in one soil. In another experiment growth responses to PGPR inoculation occurred only in three of the six soils tested. Relating features of the soil (physical chemical and biological) to shoot DW responses from inoculation in a multiple regression only showed total soil phosphorus (P) to be the most significant variable followed by lesser significant relationships with total manganase (Mn) exchangeable Calcium (Ca) and Aluminium (Al). This could arise from indirect rather than direct relationships since the variables accounted for only 50 of the variance. The results that other variables were either not measured or unknown and that may include control of deleterious rhizobacteria or some undiagnosed minor pathogens in the rhizophere. The findings are discussed in relation to the need to test selected PGPR strains over a range of field soils and sites prior to their agronomic use as a beneficial crop inoculants

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Item Type:	Article
Additional Information:	Summary (En)
AGROVOC Term:	PUERARIA PHASEOLOIDES
AGROVOC Term:	CRECIMIENTO
AGROVOC Term:	SUSTANCIAS DE CRECIMIENTO VEGETAL
AGROVOC Term:	MALASIA
AGROVOC Term:	BACTERIA
AGROVOC Term:	RIZOSFERA
AGROVOC Term:	INOCULACION
AGROVOC Term:	TIPOS DE SUELO
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:56
URI:	http://webagris.upm.edu.my/id/eprint/20871

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