Investigating the potential of endophytic lactic acid bacteria isolated from papaya seeds as plant growth promoter and antifungal agent

Mohammad Fahrulazri Mohd Jaini, . and Nurfaten Farhanah Roslan, . and Mohd Termizi Yusof, . and Noor Baity Saidi, . and Norhayati Ramli, . and Nur Ain Izzati Mohd Zainudin, . and Amalia Mohd Hashim, . Investigating the potential of endophytic lactic acid bacteria isolated from papaya seeds as plant growth promoter and antifungal agent. pp. 207-233. ISSN 1511-3701

Endophytic lactic acid bacteria (LAB) isolated from papaya seeds including a consortium of two LAB isolates Weissella cibaria PPKSD19 and Lactococcus lactis subsp. lactis PPSSD39 could previously inhibit papaya dieback disease causative agent Erwinia mallotivora BT-MARDI in vitro indicating their potential as biofertilizer. However further characterizations on other plant growth-promoting (PGP) properties of the LABs are pre-requisite to use in agricultural settings as bio-inoculum. Hence this study aimed to evaluate PGP potentials further and in vitro antifungal activity of the LABs against various plant pathogens. The LAB isolates were tested positive in indole-3-acetic acid (IAA) siderophore and ammonia production and could solubilize phosphate. Weissella cibaria PPKSD19 and L. lactis subsp. lactis PPSSD39 exhibited the strongest in vitro antifungal activity against Fusarium oxysporum TKA and Curvularia lunata. Inoculum concentration of 1108 cfu/ml of W. cibaria PPKSD19 and L. lactis subsp. lactis PPSSD39 mixture showed the highest increment in shoot and root dry weight. In conclusion W. cibaria PPKSD19 and L. lactis subsp. lactis PPSSD39 consortium displayed promising plant probiotic potential. These results highlighted the possibility of the bacterial consortium to be exploited as bioinoculant to promote plant growth and inhibit phytopathogens causing plant diseases.

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Abstract

Endophytic lactic acid bacteria (LAB) isolated from papaya seeds including a consortium of two LAB isolates Weissella cibaria PPKSD19 and Lactococcus lactis subsp. lactis PPSSD39 could previously inhibit papaya dieback disease causative agent Erwinia mallotivora BT-MARDI in vitro indicating their potential as biofertilizer. However further characterizations on other plant growth-promoting (PGP) properties of the LABs are pre-requisite to use in agricultural settings as bio-inoculum. Hence this study aimed to evaluate PGP potentials further and in vitro antifungal activity of the LABs against various plant pathogens. The LAB isolates were tested positive in indole-3-acetic acid (IAA) siderophore and ammonia production and could solubilize phosphate. Weissella cibaria PPKSD19 and L. lactis subsp. lactis PPSSD39 exhibited the strongest in vitro antifungal activity against Fusarium oxysporum TKA and Curvularia lunata. Inoculum concentration of 1108 cfu/ml of W. cibaria PPKSD19 and L. lactis subsp. lactis PPSSD39 mixture showed the highest increment in shoot and root dry weight. In conclusion W. cibaria PPKSD19 and L. lactis subsp. lactis PPSSD39 consortium displayed promising plant probiotic potential. These results highlighted the possibility of the bacterial consortium to be exploited as bioinoculant to promote plant growth and inhibit phytopathogens causing plant diseases.

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Item Type:	Article
AGROVOC Term:	Plant growth promoting bacteria
AGROVOC Term:	Seeds
AGROVOC Term:	Papayas
AGROVOC Term:	Isolation of microorganisms
AGROVOC Term:	Lactic acid bacteria
AGROVOC Term:	Endophytes
AGROVOC Term:	Antimicrobial properties
AGROVOC Term:	Antifungal agents
AGROVOC Term:	Plant growth stimulants
AGROVOC Term:	Sustainable agriculture
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:55
URI:	http://webagris.upm.edu.my/id/eprint/10364

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