Using Streptomyces spp. as plant growth-promoting inoculants for growth of napier grass under low water system


Citation

Somtrakoon Khanitta, . and Sangdee Aphidech, . and Chouychai Waraporn, . and Phunee Areeya, . and Senarit Phakamas, . Using Streptomyces spp. as plant growth-promoting inoculants for growth of napier grass under low water system. pp. 491-504. ISSN 0128-7702

Abstract

Napier grass can be used as feed for livestock and possibly for bioenergy production. However the stimulation of the growth of Napier grass by plant growth-promoting bacteria (PGPB) has been rarely found. Thus this study was performed to investigate the ability of Streptomyces spp. PB5 SRF1 St8 STRM104 and STRM302 to support the growth of Napier grass (Pennisetum purpureum Pennisetum americanum cultivar Pak Chong 1) under a low water system. Among the five bacterial isolates Streptomyces sp. St8 was the most suitable bacterial inoculant to stimulate the growth of plants grown under a low water system. Napier grass grew under a low water system and inoculated with Streptomyces sp. St8 had the highest shoot and root weight compared to the other inoculated isolates. The shoot and root fresh weights of plants grown under a low water system were 21.3 1.53 g and 4.29 0.77 g when inoculated with Streptomyces sp. St8. Moreover Streptomyces sp. St8 also stimulated the growth of plants grown under a normal water system: the highest shoot length (61.3 5.67 cm) shoot fresh weight (26.9 4.07 g) and root fresh weight (4.84 0.54 g) were found in plants inoculated with this bacterial isolate. Furthermore the plants root-to-shoot ratios grown under a low water system were inoculated with each isolate of Streptomyces sp. (PB5 SRF1 St8 STRM104 and STRM302) were lower than for plants grown in the control pots. It means that bacterial inoculation under a low water system could protect the efficiency of roots from producing shoot biomass in the plants. Based on the results found in this study Streptomyces sp. St8 a microbial inoculant can be used with Napier grass cropping to produce feed for livestock or bioenergy production.


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Abstract

Napier grass can be used as feed for livestock and possibly for bioenergy production. However the stimulation of the growth of Napier grass by plant growth-promoting bacteria (PGPB) has been rarely found. Thus this study was performed to investigate the ability of Streptomyces spp. PB5 SRF1 St8 STRM104 and STRM302 to support the growth of Napier grass (Pennisetum purpureum Pennisetum americanum cultivar Pak Chong 1) under a low water system. Among the five bacterial isolates Streptomyces sp. St8 was the most suitable bacterial inoculant to stimulate the growth of plants grown under a low water system. Napier grass grew under a low water system and inoculated with Streptomyces sp. St8 had the highest shoot and root weight compared to the other inoculated isolates. The shoot and root fresh weights of plants grown under a low water system were 21.3 1.53 g and 4.29 0.77 g when inoculated with Streptomyces sp. St8. Moreover Streptomyces sp. St8 also stimulated the growth of plants grown under a normal water system: the highest shoot length (61.3 5.67 cm) shoot fresh weight (26.9 4.07 g) and root fresh weight (4.84 0.54 g) were found in plants inoculated with this bacterial isolate. Furthermore the plants root-to-shoot ratios grown under a low water system were inoculated with each isolate of Streptomyces sp. (PB5 SRF1 St8 STRM104 and STRM302) were lower than for plants grown in the control pots. It means that bacterial inoculation under a low water system could protect the efficiency of roots from producing shoot biomass in the plants. Based on the results found in this study Streptomyces sp. St8 a microbial inoculant can be used with Napier grass cropping to produce feed for livestock or bioenergy production.

Additional Metadata

[error in script]
Item Type: Article
AGROVOC Term: Streptomyces
AGROVOC Term: Plant growth promoting bacteria
AGROVOC Term: Napier grass
AGROVOC Term: Low water
AGROVOC Term: Water saving
AGROVOC Term: Inoculation methods
AGROVOC Term: Biofertilizers
AGROVOC Term: Experimental design
AGROVOC Term: Statistical analysis
AGROVOC Term: Analysis of variance
Depositing User: Mr. AFANDI ABDUL MALEK
Last Modified: 24 Apr 2025 00:55
URI: http://webagris.upm.edu.my/id/eprint/10533

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