Screening of the drought tolerant phosphate solubilizing bacteria in dissolving P-inorganic

Abstract

The drought tolerant phosphate solubilizing bacteria is needed to dissolve inorganic phosphate (P) which is usually low in the availability at dry land. This study is aimed to obtain a combination of drought tolerant phosphate solubilizing bacteria which has high potential in dissolving P-inorganic. An experimental study which has 4 treatments of bacterial combinations has been conducted in a laboratory. The first treatment was the combination between Pseudomonas azotoformans (A) and Acinetobacter baumannii (B). The second treatment was the combination of A and Bacillus paramycoides (C). The third treatment was B and C, then the fourth treatment was A, B, and C. The potential of the bacterial combination in dissolving P-inorganic was measured qualitatively using phosphate solubilizing index (PSI) on pikovskaya solid medium. While, the potential of the bacterial combination in dissolving P-inorganic was measured quantitatively by measuring dissolved P using the ascorbic acid method in pikovskaya liquid medium containing 0.5% Ca3(PO4)2. The results showed that the combination of those three bacteria (A B and C) has the best potential to dissolve P-inorganic compared to other combinations. In addition, the three bacteria combination also resulted in the highest dissolved P with 0.29% potential dissolution of the total Ca3(PO4)2 contained in the pikovskaya liquid medium, followed by combination of B and C (0.19%), and A and C (0.18%), respectively. Thus, before the combination of these three bacteria is applied in soil, it is needed further experiment of the potential of the bacteria in dissolving soil P-inorganic.

Characterization and Diversity of plant growth promoting Endophytic and Rhizosphere Bacteria isolated from theRhizosphere and tissues of Pepper and their effect on plant growth promotion and disease suppression of Phytophthora capsici

“…3b, the increased concentration of the P-solublization in the pikovskaya liquid medium by bacterial isolates is in accordance with the increase of the PSI values, with the correlation and P-value value of 0.79 and P ≤ 0.0037 respectively. Also in previous studies where the correlation of Psolubilization and PSI was 0.89 63 .…”

Edukasi Pengolahan Limbah Baglog Jamur Tiram Menjadi Pupuk Organik Diperkaya Bakteri Pelarut Fosfat Pada Petani Muda Milenial di Desa Narmada Kabupaten Lombok Barat

“…Salah satu bioaktivator yang diperkenalkan adalah bioaktivator konsorsium bakteri pelarut fosfat (KBPF), hasil penelitian nasional skim Penelitian terapan tahun 2017 sd 2019, dan sedang dalam pengajuan paten sederhana dengan No. Permohonan SID201902856 (Susilowati et al, 2019). Konsorsium bakteri ini memiliki multi fungsi yaitu sebagai pelarut fosfat, penghasil IAA, pengendali penyakit yang disebabkan oleh jamur Sclerotium rolfsii dan pengurai bahan organik Pengolahan limbah baglog menjadi pupuk organik diperkaya bakteri pelarut fosfat diharapkan menjadi peluang usaha baru bagi petani milenial sebagai usaha turunan dari usaha budidaya jamur tiram, dan sekaligus sebagai pembelajaran bermanfaat untuk mengendalikan pencemaran lingkungan.…”

“…Permohonan SID201902856. Konsorsium bakteri ini memiliki multi fungsi yaitu sebagai pelarut fosfat, penghasil IAA, pengendali penyakit yang disebabkan oleh jamur Sclerotium rolfsii dan pengurai bahan organik (Susilowati et al, 2019).…”

Transformation of phosphorus forms and its regulation on phosphorus availability across differently degraded marsh soils

“…For Ca-P forms, a remarkable change was observed in the concentration and proportion of available Ca 2 -P increased under marsh degradation, whereas those of unavailable Ca 10 -P decreased (Figures 3a-d and 4a-b). This is because marsh desiccation accompanied by the transition of the plant community or overgrazing may enhance the activity and/or quantity of phosphate-dissolving bacteria, such as Pseudomonas , Bacillus, and Erwini (Liu et al, 2015;Susilowati et al, 2019) and increase the organic acids from plants, microbes, and/or livestock excreta (Almeida et al, 2020;Gyaneshwar et al, 2002;Miao et al, 2013;Nuryana et al, 2019). Improved phosphate-dissolving bacteria and organic acids can further stimulate the transformation of Ca 10 -P to other labile inorganic P forms such as Ca 2 -P, Ca 8 -P, and Al-P (Almeida et al, 2020;Susilowati et al, 2019).…”

“…This is because marsh desiccation accompanied by the transition of the plant community or overgrazing may enhance the activity and/or quantity of phosphate-dissolving bacteria, such as Pseudomonas , Bacillus, and Erwini (Liu et al, 2015;Susilowati et al, 2019) and increase the organic acids from plants, microbes, and/or livestock excreta (Almeida et al, 2020;Gyaneshwar et al, 2002;Miao et al, 2013;Nuryana et al, 2019). Improved phosphate-dissolving bacteria and organic acids can further stimulate the transformation of Ca 10 -P to other labile inorganic P forms such as Ca 2 -P, Ca 8 -P, and Al-P (Almeida et al, 2020;Susilowati et al, 2019). Similarly, Jamil et al (2016) revealed that Calcisols with greater biological activity under sugarcane crop cover had a high concentration of Ca 2 -P in the estuary plains of Pakistan.…”