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Exploration of Phosphate-Solubilizing Rhizobacteria Associated with Liberica Tungkal Composite Coffee (Coffea liberica) in Jambi, Indonesia

Proceedings Academic Universitas Jambi · Vol. 2 No. 3 (2026) · hlm. 215–223

DOI
10.22437/proca.v2i3.60001
Terbit
2026-09-02
Penerbit
LPPM Universitas Jambi
Bahasa
en
Lisensi
creativecommons.org/licenses/by/4.0

Abstrak

Phosphorus (P) is an essential macronutrient required for plant growth and productivity; however, most phosphorus in soil occurs in insoluble forms that are unavailable for plant uptake. Phosphate-solubilizing bacteria (PSB) play an important role in improving phosphorus availability by converting insoluble phosphate into soluble forms, thereby enhancing nutrient-use efficiency and reducing dependence on chemical fertilizers. This study aimed to explore phosphate-solubilizing rhizobacteria associated with Liberica Tungkal Composite coffee (Coffea liberica) cultivated in Tanjung Jabung Barat and Tanjung Jabung Timur Regencies, Jambi Province, Indonesia. Rhizosphere bacteria were isolated and screened for their phosphate-solubilizing ability on Pikovskaya agar medium. Phosphate-solubilizing activity was evaluated qualitatively based on the formation of clear halos surrounding bacterial colonies. A total of 30 rhizosphere bacterial isolates were successfully obtained. All isolates formed clear halos on Pikovskaya agar medium, with halo diameters ranging from 0.2 to 1.2 cm, indicating their ability to solubilize insoluble phosphate. The variation in halo diameter suggests differences in phosphate-solubilizing activity among the isolates. These findings demonstrate that the rhizosphere of Liberica Tungkal Composite coffee harbors diverse indigenous phosphate-solubilizing bacteria with potential for further characterization and development as biofertilizers to improve phosphorus availability and support sustainable Liberica coffee cultivation.

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  • Institut Agama Islam Negeri Parepare
  • Universitas Jambi
  • Diponegoro University
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Rekan penulisOrganisasiArtikel bersama
Gusniwati GusniwatiInstitut Agama Islam Negeri Parepare6
Made Deviani DuajaAfiliasi tidak diketahui6
Yusnaidar YusnaidarUniversitas Jambi2
Sutrisno SutrisnoDiponegoro University2
Indra Lasmana TariganAfiliasi tidak diketahui2
Madyawati LatiefAfiliasi tidak diketahui2
Muhammad Irhash ShalihinAfiliasi tidak diketahui2
Adzuan Handi DuansyahAfiliasi tidak diketahui2
Samsidar SamsidarAfiliasi tidak diketahui2
Yulia AliaAfiliasi tidak diketahui1
Ardiyaningsih Puji LestariAfiliasi tidak diketahui1
Ermadani ErmadaniAfiliasi tidak diketahui1
IriantoAfiliasi tidak diketahui1
Yudha Agung PratamaAfiliasi tidak diketahui1
Yulia Morsa SaidAfiliasi tidak diketahui1
Erwin SaputraAfiliasi tidak diketahui1

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Sumber metadata: OAI-PMH (metadata jurnal) https://online-journal.unja.ac.id/index.php/PROCA/oai, pertama di-harvest 6 Nov 2026, terakhir terlihat 8 Nov 2026.
Metadata asli (oai_dc) 
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	<dc:title xml:lang="en">Exploration of Phosphate-Solubilizing Rhizobacteria Associated with Liberica Tungkal Composite Coffee (Coffea liberica) in Jambi, Indonesia</dc:title>
	<dc:creator xml:lang="en">lizawati, lizawati</dc:creator>
	<dc:creator xml:lang="en">Kartika, Elis</dc:creator>
	<dc:creator xml:lang="en">Marwan, Husda</dc:creator>
	<dc:creator xml:lang="en">Antony, Dedy</dc:creator>
	<dc:creator xml:lang="en">Wilia, Weni</dc:creator>
	<dc:subject xml:lang="en">biofertilizer</dc:subject>
	<dc:subject xml:lang="en">Coffea liberica</dc:subject>
	<dc:subject xml:lang="en">phosphate-solubilizing bacteria</dc:subject>
	<dc:subject xml:lang="en">Pikovskaya agar</dc:subject>
	<dc:subject xml:lang="en">rhizosphere bacteria.</dc:subject>
	<dc:description xml:lang="en">Phosphorus (P) is an essential macronutrient required for plant growth and productivity; however, most phosphorus in soil occurs in insoluble forms that are unavailable for plant uptake. Phosphate-solubilizing bacteria (PSB) play an important role in improving phosphorus availability by converting insoluble phosphate into soluble forms, thereby enhancing nutrient-use efficiency and reducing dependence on chemical fertilizers. This study aimed to explore phosphate-solubilizing rhizobacteria associated with Liberica Tungkal Composite coffee (Coffea liberica) cultivated in Tanjung Jabung Barat and Tanjung Jabung Timur Regencies, Jambi Province, Indonesia. Rhizosphere bacteria were isolated and screened for their phosphate-solubilizing ability on Pikovskaya agar medium. Phosphate-solubilizing activity was evaluated qualitatively based on the formation of clear halos surrounding bacterial colonies. A total of 30 rhizosphere bacterial isolates were successfully obtained. All isolates formed clear halos on Pikovskaya agar medium, with halo diameters ranging from 0.2 to 1.2 cm, indicating their ability to solubilize insoluble phosphate. The variation in halo diameter suggests differences in phosphate-solubilizing activity among the isolates. These findings demonstrate that the rhizosphere of Liberica Tungkal Composite coffee harbors diverse indigenous phosphate-solubilizing bacteria with potential for further characterization and development as biofertilizers to improve phosphorus availability and support sustainable Liberica coffee cultivation.</dc:description>
	<dc:publisher xml:lang="en">LPPM Universitas Jambi</dc:publisher>
	<dc:date>2026-09-02</dc:date>
	<dc:type>info:eu-repo/semantics/article</dc:type>
	<dc:type>info:eu-repo/semantics/publishedVersion</dc:type>
	<dc:format>application/pdf</dc:format>
	<dc:identifier>https://online-journal.unja.ac.id/PROCA/article/view/60001</dc:identifier>
	<dc:identifier>10.22437/proca.v2i3.60001</dc:identifier>
	<dc:source xml:lang="en">Proceedings Academic Universitas Jambi; Vol. 2 No. 3 (2026): The 6th Green Development International Conference; 215-223</dc:source>
	<dc:source>10.22437/5c7v5092</dc:source>
	<dc:language>en</dc:language>
	<dc:relation>https://online-journal.unja.ac.id/PROCA/article/view/60001/25564</dc:relation>
	<dc:rights xml:lang="en">Copyright (c) 2026 lizawati lizawati</dc:rights>
	<dc:rights xml:lang="en">https://creativecommons.org/licenses/by/4.0</dc:rights>
</oai_dc:dc>