Effect of Rhizobacterial Isolates on Sweet potato Plant Growth
Farzana Yasmin, Radziah Othman, Rashid Ma, Reddy Bn, Nazmul MHM
1025
ABSTRACT
Aim:
Plant
growth promoting rhizobacteria (PGPR) are beneficial bacteria that improveplant
growth by a wide variety of mechanisms. Thisstudy was conducted to observe the effect of
Rhizobacterial isolates on early growth of sweet potato plants.
Methods: A pot experiment under glasshouse
conditions was conducted to observe early growth of plant as affected by
bacteria.
The inoculation process could stimulate the plant growth and development as
observed in the smaller pots (2kg soil).Plants were treated with PGPR isolates
and harvested after 30 days of growth.
Results:Four
bacterial isolates produced PGP compounds like IAA, solubilized phosphate,
fixed nitrogen and resistance to antibiotic. Most of isolates resulted in a
significant increase of root and shoot growth. A significant increase of root
volume (58%) and root dry weight (56%) was recorded as compared to uninoculated
control.The results showed that inoculation of Klebsiella sp. UPMSP9 and Erwinia
sp. UPMSP10 increased tops and roots growth, uptake of N, P, K Ca and Mg in
plant tissue and bacterial population in soil.
Conclusion:The experiment
indicated that Klebsiella
sp and Erwiniaspare used as
bioenhancersmight be beneficial for growth of sweetpotato.
Key
words: Sweet potato, Plant growth-promoting
rhizobacteria, Klebsiella sp and Erwiniasp,
ABSTRACT
Aim:
Plant
growth promoting rhizobacteria (PGPR) are beneficial bacteria that improveplant
growth by a wide variety of mechanisms. Thisstudy was conducted to observe the effect of
Rhizobacterial isolates on early growth of sweet potato plants.
Methods: A pot experiment under glasshouse
conditions was conducted to observe early growth of plant as affected by
bacteria.
The inoculation process could stimulate the plant growth and development as
observed in the smaller pots (2kg soil).Plants were treated with PGPR isolates
and harvested after 30 days of growth.
Results:Four
bacterial isolates produced PGP compounds like IAA, solubilized phosphate,
fixed nitrogen and resistance to antibiotic. Most of isolates resulted in a
significant increase of root and shoot growth. A significant increase of root
volume (58%) and root dry weight (56%) was recorded as compared to uninoculated
control.The results showed that inoculation of Klebsiella sp. UPMSP9 and Erwinia
sp. UPMSP10 increased tops and roots growth, uptake of N, P, K Ca and Mg in
plant tissue and bacterial population in soil.
Conclusion:The experiment
indicated that Klebsiella
sp and Erwiniaspare used as
bioenhancersmight be beneficial for growth of sweetpotato.
Key
words: Sweet potato, Plant growth-promoting
rhizobacteria, Klebsiella sp and Erwiniasp,