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

Chouychai, Waraporn and Sangdee, Aphidech and Phunee, Areeya and Senarit, Phakamas and Somtrakoon, Khanitta (2022) Using Streptomyces sp. as plant growth-promoting inoculants for growth of Napier grass under low water system. Pertanika Journal of Science & Technology (Malaysia), 45 (2). pp. 491-504. ISSN 2231-8526

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 plant’s 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.

Full text available from: Official URL: http://www.pertanika.upm.edu.my/resources/files/Pe...

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 plant’s 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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Item Type:	Article
AGROVOC Term:	Pennisetum purpureum
AGROVOC Term:	Streptomyces
AGROVOC Term:	low water
AGROVOC Term:	Bacteria
AGROVOC Term:	inoculation
AGROVOC Term:	research
AGROVOC Term:	growth rate
AGROVOC Term:	feeds
AGROVOC Term:	feedstocks
Geographical Term:	Thailand
Uncontrolled Keywords:	Low water, Napier grass, plant growthpromoting bacteria, Streptomyces
Depositing User:	Ms. Azariah Hashim
Date Deposited:	27 Jan 2025 02:49
Last Modified:	27 Jan 2025 02:49
URI:	http://webagris.upm.edu.my/id/eprint/1924

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