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All Journal Jurnal MIPA JTSL (Jurnal Tanah dan Sumberdaya Lahan) Journal of Degraded and Mining Lands Management
Prasgi, Henokh Christian
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Environmental Science Mathematics Physics

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Analisis Hubungan Kekerabatan Fenetik serta Potensi Kegunaan Varietas Portulaca oleracea dan Portulaca grandiflora di Desa Grogol, Kelurahan Dukuh, Kota Salatiga Prasgi, Henokh Christian; Pratama, Dimas Seno Bagus; Kapitarauw, Agnesya Giovani Putri Cendana; Kasmiyati, Sri
Jurnal MIPA Vol 11, No 1 (2022)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jm.v11i1.35054

Abstract

Portulacaceae merupakan tumbuhan dikotil dari famili Portulacaceae yang dapat hidup di berbagai kondisi tanah sehingga disebut gulma serta memiliki bentuk dan variasi warna bunga yang beragam untuk dijadikan tanaman hias. Portulaca memiliki berbagai kegunaan untuk kesehatan, sehingga diperlukan suatu program pemuliaan tanaman yang didasarkan pada kekekerabatan menggunakan karakter morfologinya. Tujuan penelitian ini untuk mengetahui hubungan kekerabatan atau fenetik serta sifat kegunaan dari beberapa varietas Portulaca oleracea dan Portulaca grandiflora di Desa Grogol, Kelurahan Dukuh, Kota Salatiga dengan metode Analysis of Cluster dan Euclidean Matrix of Index Dissimilarity. Penelitian ini dilaksanakan di Desa Grogol, Kelurahan Dukuh, Kecamatan Sidomukti, Kota Salatiga, Jawa Tengah. Jenis penelitian deskiptif eksploratif. Karakter yang digunakan sebanyak 22 buah yang dianalis denggan program PAST. Hasil penelitian menunjukkan 6 anggota famili Portulacaceae yang dianalisis dengan metode Analysis of Cluster membentuk 2 klaster utama yaitu klaster 1 Portulaca grandiflora (Oranye, Putih, dan Pink) serta klaster 2 Portulaca oleracea (Kuning. Merah, dan Pink) dengan indeks kesamaan terbesar pada P. grandiflora Oranye dengan P. grandiflora Putih serta P. grandiflora Putih dengan P. grandiflora Pink (99%), sedangkan yang terendah antara Portulaca grandiflora Oranye dengan Portulaca oleracea Merah (94,8038%). Pigmen, faktor genetik, dan lingkungan menyebabkan perbedaan karakter. Kedua spesies ini berpeluang besar dalam pengembangan obat-obatan karena senyawa dan sifatnya.
Dynamic capability of P-solubilizing endophytic and rhizospheric bacteria from various vegetation of Alas Bromo for reducing chemical fertilizer use Prasgi, Henokh Christian; Ariyanto, Dwi Priyo; Cahyani, Vita Ratri
Journal of Degraded and Mining Lands Management Vol. 12 No. 3 (2025)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2025.123.7617

Abstract

The application of agrochemicals is still the main practice in the agroforestry system of Alas Bromo. Alfisols in Alas Bromo were characterized as acidic soil with very low soil available P. This study aimed to examine the capacity of P-solubilizing endophytic and rhizospheric bacteria from various Alas Bromo vegetation: mahogany, wresah, peanut, elephant grass, and maize in increasing soil available P and enhancing maize growth, which has the potential for reducing chemical fertilizer use. The research began with exploring and isolating bacteria using Pikovskaya agar medium, followed by in vitro tests of functional abilities and greenhouse experiments (soil incubation continued with maize planting). Rock phosphate was used as a P-inorganic source with a dose of 150 kg   ha-1. Based on the highest PSI, a total of 15 out of 52 isolated bacteria from 5 vegetations were selected to be tested in vitro and in a greenhouse experiment. Among the assessed bacteria, 3 endophytic bacterial isolates of Ad_R_5, Ah_R_4, and Zm_L_6 showed consistently high performance during successive assessments. Compared to basal treatment, the increases of soil available P, shoot fresh weight, and shoot dry weight by these 3 superior isolates ranged from 51.11-90.29%, 38.27-89.75%, and 57.04-88.73%, while the increases by NPK were 93.53, 113.67 and 107.04%, indicating the isolates had high potential for reducing chemical fertilizer use. The 3 superior isolates were identified as Pantoea dispersa, Ralstonia picketii, and Enterobacter hormaechei, respectively. Further study is needed to investigate the other potential capabilities, such as pesticide degradation and supporting plant resistance to drought stress.
INDIGENOUS MICROBIAL ENGINEERING TECHNOLOGY FOR SUSTAINABLE PEATLAND MANAGEMENT IN INDONESIA Prasgi, Henokh Christian; Suntoro
JTSL (Jurnal Tanah dan Sumberdaya Lahan) Vol. 13 No. 2 (2026)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtsl.2026.013.2.4

Abstract

Peatlands are unique wetland ecosystems that play a significant role in carbon sequestration and maintaining hydrological balance. However, human activities have led to peatland degradation in Indonesia, resulting in the loss of ecosystem services and ecological functions of peat soils as well as increased greenhouse gas emissions. Restoring and rehabilitating peatlands requires sustainable and ecosystem-based approaches that harness local potential. One potential strategy involves the use of indigenous microbes through microbial engineering technology. This literature review highlights the potential of indigenous microbes as a sustainable peatland management strategy in Indonesia. Indigenous microbes, which are naturally adapted to the acidic and nutrient-poor conditions of peatlands, have potential as bioremediation agents, organic matter decomposers, and plant growth promoters. Microbial engineering involves several stages, including isolation, in vitro selection, pot tests, and the formulation of superior microbes for field application. This technology aims to improve soil quality, enhance microbial community structure, and boost land productivity without harming the environment. It can also accelerate the sustainable restoration of peatland functions, support food security, and mitigate climate change. The development of this technology necessitates further research, supportive policies, and the engagement of local communities to ensure its effective and long-term implementation.
Co-Authors Dwi Priyo Ariyanto Kapitarauw, Agnesya Giovani Putri Cendana Pratama, Dimas Seno Bagus Sri Kasmiyati Suntoro Vita Ratri Cahyani