Effects of Inoculation with Plant Growth-promoting Bacteria on Bruguiera gymnorrhiza Seedlings

LI Mei; LIAO Bao-wen; KANG Li-hua; ZHENG Song-fa; CHEN Yu-jun

A pot experiment was conducted to investigate the growth-promoting effects of inoculation with plant growth-promoting bacteria on Bruguiera gymnorrhiza seedlings, including six phosphate solubilizing bacterial strains (i. e. B. amy, Vib,B. atr,Xan,B. Lie,P. M.) and five nitrogen-fixing bacterial strains (i. e. Au4,Phy ,24S,JA4,cd) . Results showed that: (1) After inoculated with the PSB for six months, the growth of the B. gymnorrhiza seedlings was accelerated significantly. The average height of B. gymnorrhiza seedlings was increased by 21. 57%-9. 54% compared to those of controls, and the biomass was accordingly increased by 27. 49%-20. 32% . The total N and P contents of inoculated seedling leaves were 33.33%-1.35% and 24.42%-2.04% respectively higher than those of controls; (2)The test of significance of difference also indicated that the growth-promoting effects of B. amy and Vib were significantly higher than those of other PSBs; (3) Six months after the inoculation of nitrogen-fixing bacterial strains, the average height of B. gymnorrhiza seedlings were increased by 24.07%-10.22% , and the biomass was accordingly increased by 32.36%-19.71% . The total N and P contents of inoculated seedling leaves were 23. 39%-4.05% and 32. 79%-4. 99% respectively higher than those of controls; (4) The test of significance of difference also indicated that the growth-promoting effects of Au4 and Phy were significantly higher than those of other nitrogen-fixing bacterial strains.

1. Research Institute of Tropical Forestry, CAF, Guangzhou 510520, Guangdong, China

Received Date: 2005-04-15

Abstract: A pot experiment was conducted to investigate the growth-promoting effects of inoculation with plant growth-promoting bacteria on Bruguiera gymnorrhiza seedlings, including six phosphate solubilizing bacterial strains (i. e. B. amy, Vib,B. atr,Xan,B. Lie,P. M.) and five nitrogen-fixing bacterial strains (i. e. Au4,Phy ,24S,JA4,cd) . Results showed that: (1) After inoculated with the PSB for six months, the growth of the B. gymnorrhiza seedlings was accelerated significantly. The average height of B. gymnorrhiza seedlings was increased by 21. 57%-9. 54% compared to those of controls, and the biomass was accordingly increased by 27. 49%-20. 32% . The total N and P contents of inoculated seedling leaves were 33.33%-1.35% and 24.42%-2.04% respectively higher than those of controls; (2)The test of significance of difference also indicated that the growth-promoting effects of B. amy and Vib were significantly higher than those of other PSBs; (3) Six months after the inoculation of nitrogen-fixing bacterial strains, the average height of B. gymnorrhiza seedlings were increased by 24.07%-10.22% , and the biomass was accordingly increased by 32.36%-19.71% . The total N and P contents of inoculated seedling leaves were 23. 39%-4.05% and 32. 79%-4. 99% respectively higher than those of controls; (4) The test of significance of difference also indicated that the growth-promoting effects of Au4 and Phy were significantly higher than those of other nitrogen-fixing bacterial strains.

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Reference (20)

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Effects of Inoculation with Plant Growth-promoting Bacteria on Bruguiera gymnorrhiza Seedlings

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References

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