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Potential Role of Plant Growth-Promoting Halotolerant Bacteria in Enhancing Shallot Growth under Salinity Stress

Caraka Tani: Journal of Sustainable Agriculture · Vol. 40 No. 3 (2025) · hlm. 439–459

DOI
10.20961/carakatani.v40i3.98106
ISSN
2599-2570, 2613-9456
Terbit
2025-07-14
Penerbit
Universitas Sebelas Maret
Bahasa
eng
Lisensi
creativecommons.org/licenses/by-nc/4.0

Abstrak

Soil salinization, driven by seawater intrusion, significantly challenges agricultural productivity in coastal regions. Horticultural crops, such as shallots, are especially sensitive to salinity stress, which impairs growth, nutrient uptake, and bulb yield. This study explored halotolerant plant growth-promoting bacteria from saline soils in East Nusa Tenggara, Indonesia, to reduce salinity stress in shallots. Seventeen bacterial isolates were screened for halotolerance, and eight of them were capable of growing at 1,250 mM NaCl (OD600 ≥ 0.5). Selected halotolerant isolates also exhibited the ability to produce indole-3-acetic acid (IAA) and exopolysaccharides (EPS), solubilize P, K, and Zn, produce siderophores, and exhibit 1-aminocyclopropane-1-carboxylate (ACC) deaminase activity with varying tolerance at salinity levels up to 1,000 mM NaCl. Inoculation with these isolates significantly improved shallot seedling growth under 90 to 230 mM NaCl, with Enterobacter hormaechei demonstrating the best performance. Bacterial inoculation elevated 47 to 64% proline and 15 to 107% NO3− levels in shallot leaves compared to uninoculated plants, contributing to osmotic adjustment and enhanced nutrient assimilation under salt stress in laboratory trials. Single-strain (E. hormaechei) and a consortium of compatible strains (E. hormaechei strain R11 and M119.1, Klebsiella pneumoniae strain A95, K. variicola strain R198, and Pseudochrobactrum asaccharolyticum strain C167.1) inoculation significantly increased shoot dry weight (100% and 69% each) compared to uninoculated plants under salt stress. These findings advance the current understanding of microbial-assisted salinity mitigation and support broader strategies for climate-resilient, sustainable agriculture in saline-prone coastal regions.

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  • IPB University
  • Lampung University
  • Nara Institute of Science and Technology
  • University of Darussalam Gontor
  • Indonesian Center for Agricultural Biotechnology and Genetic Resource Research and Development
  • University of Brawijaya
  • Universitas Nusa Bangsa
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Rekan penulisOrganisasiArtikel bersama
Muhammad Dima Iqbal HamdaniLampung University2
Edi SantosaIPB University2
Lutfy Ditya CahyantiUniversity of Darussalam Gontor2
Heni PurnamawatiIPB University2
Yadi SetiadiIPB University2
Ali HusniIndonesian Center for Agricultural Biotechnology and Genetic Resource Research and Development1
Muhammad Tino FajarLampung University1
Windarti ArdaniUniversity of Brawijaya1
Hamim HamimUniversitas Islam Negeri Maulana Malik Ibrahim1
Luluk SetyaningsihUniversitas Nusa Bangsa1
Sri Wilarso BudiIPB University1
SuharsonoNational Research and Innovation Agency1
Radite TistamaIPB University1
Utut WidyastutiIPB University1
Akiho YokotaNara Institute of Science and Technology1
Kinya AkashiNara Institute of Science and Technology1
SuwarnoDiponegoro University1
Hajrial AswidinnoorIPB University1
TRIKOESOEMANINGTYASIPB University1
Angelita Puji LestariIPB University1
Fadliah SalimIPB University1
Mohamad YaniIPB University1
Suharsono SuharsonoIPB University1
Syamsidah RahmawatiAfiliasi tidak diketahui1
Osmat Azzam JeffersonAfiliasi tidak diketahui1
Inez H. Slamet‐LoedinAfiliasi tidak diketahui1
Sumarni SumarniUniversitas Jambi1
Kusuma AdhiantoLampung University1
Sudirman YahyaIPB University1
Agus Nur HidayahAfiliasi tidak diketahui1
Fauziatul FitriyahAfiliasi tidak diketahui1
Muhammad Abdul AzizAfiliasi tidak diketahui1
Sri WahyuniAfiliasi tidak diketahui1
Hana FadilaAfiliasi tidak diketahui1
Insyiah Meida LuktyansyahAfiliasi tidak diketahui1
Priyono PriyonoAfiliasi tidak diketahui1
Siswanto SiswantoAfiliasi tidak diketahui1

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Sumber metadata: OAI-PMH (metadata jurnal) http://jurnal.uns.ac.id/carakatani/oai, pertama di-harvest 8 Nov 2026, terakhir terlihat 8 Nov 2026.
Metadata asli (oai_dc) 
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	<dc:title xml:lang="en-US">Potential Role of Plant Growth-Promoting Halotolerant Bacteria in Enhancing Shallot Growth under Salinity Stress</dc:title>
	<dc:creator>Setiaji, Arkan</dc:creator>
	<dc:creator>Sulastri, Sulastri</dc:creator>
	<dc:creator>Sopandie, Didy</dc:creator>
	<dc:subject xml:lang="en-US">agronomy; plant-microbe interactions; abiotic stress</dc:subject>
	<dc:subject xml:lang="en-US">physiological acclimatization; plant-growth promoting traits; salt-affected soils; salt-tolerant bacteria; sustainable agriculture</dc:subject>
	<dc:description xml:lang="en-US">Soil salinization, driven by seawater intrusion, significantly challenges agricultural productivity in coastal regions. Horticultural crops, such as shallots, are especially sensitive to salinity stress, which impairs growth, nutrient uptake, and bulb yield. This study explored halotolerant plant growth-promoting bacteria from saline soils in East Nusa Tenggara, Indonesia, to reduce salinity stress in shallots. Seventeen bacterial isolates were screened for halotolerance, and eight of them were capable of growing at 1,250 mM NaCl (OD600 ≥ 0.5). Selected halotolerant isolates also exhibited the ability to produce indole-3-acetic acid (IAA) and exopolysaccharides (EPS), solubilize P, K, and Zn, produce siderophores, and exhibit 1-aminocyclopropane-1-carboxylate (ACC) deaminase activity with varying tolerance at salinity levels up to 1,000 mM NaCl. Inoculation with these isolates significantly improved shallot seedling growth under 90 to 230 mM NaCl, with Enterobacter hormaechei demonstrating the best performance. Bacterial inoculation elevated 47 to 64% proline and 15 to 107% NO3− levels in shallot leaves compared to uninoculated plants, contributing to osmotic adjustment and enhanced nutrient assimilation under salt stress in laboratory trials. Single-strain (E. hormaechei) and a consortium of compatible strains (E. hormaechei strain R11 and M119.1, Klebsiella pneumoniae strain A95, K. variicola strain R198, and Pseudochrobactrum asaccharolyticum strain C167.1) inoculation significantly increased shoot dry weight (100% and 69% each) compared to uninoculated plants under salt stress. These findings advance the current understanding of microbial-assisted salinity mitigation and support broader strategies for climate-resilient, sustainable agriculture in saline-prone coastal regions.</dc:description>
	<dc:publisher xml:lang="en-US">Universitas Sebelas Maret</dc:publisher>
	<dc:contributor xml:lang="en-US">National Research and Innovation Agency (BRIN)</dc:contributor>
	<dc:date>2025-07-14</dc:date>
	<dc:type>info:eu-repo/semantics/article</dc:type>
	<dc:type>info:eu-repo/semantics/publishedVersion</dc:type>
	<dc:type xml:lang="en-US"></dc:type>
	<dc:format>application/pdf</dc:format>
	<dc:identifier>https://jurnal.uns.ac.id/carakatani/article/view/98106</dc:identifier>
	<dc:identifier>10.20961/carakatani.v40i3.98106</dc:identifier>
	<dc:source xml:lang="en-US">Caraka Tani: Journal of Sustainable Agriculture; Vol 40, No 3 (2025): July; 439-459</dc:source>
	<dc:source>2599-2570</dc:source>
	<dc:source>2613-9456</dc:source>
	<dc:language>eng</dc:language>
	<dc:relation>https://jurnal.uns.ac.id/carakatani/article/view/98106/pdf</dc:relation>
	<dc:relation>https://jurnal.uns.ac.id/carakatani/article/downloadSuppFile/98106/20539</dc:relation>
	<dc:rights xml:lang="en-US">Copyright (c) 2025 Caraka Tani: Journal of Sustainable Agriculture</dc:rights>
	<dc:rights xml:lang="en-US">http://creativecommons.org/licenses/by-nc/4.0</dc:rights>
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