Effect of Streptomyces inoculation on Ipomoea aquatica and Pachyrhizus erosus grown under salinity and low water irrigation conditions


Citation

Sangdee Aphidech, . and Chouychai Waraporn, . and Somtrakoon Khanitta, . Effect of Streptomyces inoculation on Ipomoea aquatica and Pachyrhizus erosus grown under salinity and low water irrigation conditions. pp. 411-432. ISSN 0128-7702

Abstract

The distribution of salty areas and drought conditions caused by climate change can limit successful crop production. The co-occurrence of salinity and drought gives a unique challenge for plant growth-promoting bacteria (PGPB) in agricultural purposes. In this study the effect of irrigation and salinity on the abilities of isolates of plant growthpromoting bacteria (Streptomyces sp. St1 and St8) to promote the growth of Ipomoea aquatica and Pachyrhizus erosus was investigated. Both plants were planted in pots with combinations of salinity (non-saline or saline soil) different irrigation levels and different bacterial inoculations. The results showed that the salinity decreased the root dry weight of I. aquatica and decreased the shoot and root dry weight of P. erosus. Salinity also decreased the tuber formation and root efficiency of P. erosus. Low irrigation and bacterial species did not affect either plants shoot or root growth. However the chlorophyll content in the leaves of both plants decreased in the inoculated plants compared to the non-inoculated plants. Among the three factors in this study salinity was the most influential factor and irrigation was the least effective factor on plant growth for both parts. Soil salinity may concern plant growth-promoting bacteria and salt-tolerant strains may be an interesting choice for use in combination with saline and low water conditions.


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Abstract

The distribution of salty areas and drought conditions caused by climate change can limit successful crop production. The co-occurrence of salinity and drought gives a unique challenge for plant growth-promoting bacteria (PGPB) in agricultural purposes. In this study the effect of irrigation and salinity on the abilities of isolates of plant growthpromoting bacteria (Streptomyces sp. St1 and St8) to promote the growth of Ipomoea aquatica and Pachyrhizus erosus was investigated. Both plants were planted in pots with combinations of salinity (non-saline or saline soil) different irrigation levels and different bacterial inoculations. The results showed that the salinity decreased the root dry weight of I. aquatica and decreased the shoot and root dry weight of P. erosus. Salinity also decreased the tuber formation and root efficiency of P. erosus. Low irrigation and bacterial species did not affect either plants shoot or root growth. However the chlorophyll content in the leaves of both plants decreased in the inoculated plants compared to the non-inoculated plants. Among the three factors in this study salinity was the most influential factor and irrigation was the least effective factor on plant growth for both parts. Soil salinity may concern plant growth-promoting bacteria and salt-tolerant strains may be an interesting choice for use in combination with saline and low water conditions.

Additional Metadata

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Item Type: Article
AGROVOC Term: Streptomyces
AGROVOC Term: Ipomoea aquatica
AGROVOC Term: Salinity control
AGROVOC Term: Low water
AGROVOC Term: Inoculation methods
AGROVOC Term: Experimental design
AGROVOC Term: Statistical analysis
AGROVOC Term: Bacteria
AGROVOC Term: Plant growth promoting bacteria
AGROVOC Term: Improvement felling
Depositing User: Mr. AFANDI ABDUL MALEK
Last Modified: 24 Apr 2025 00:55
URI: http://webagris.upm.edu.my/id/eprint/10525

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