Effect of bio-silica on drought tolerance in plants

Santi, Laksmita Prima; Nurhaimi-Haris,; Mulyanto, Djoko

doi:10.1088/1755-1315/183/1/012014

Cited by 20 publications

(17 citation statements)

References 36 publications

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“…Silicon, though available abundantly, remains unavailable to plants due to its poor solubility. Role of microbes in converting to its plant available form in order to enhance abiotic and biotic stress tolerance in plant is well established (Brindavathy et al, 2012;Santi and Mulyanto, 2018). However, in absence of high throughput media and method to screen silicon-solubilizing bacteria, there arises a need to develop a silicon-solubilizing media (NBRISSM) efficient to discriminate between Si from P. Among different Si sources screened, magnesium trisilicate chosen as best Si source was in accordance to the report of Vasanthi et al (2018).…”

Section: Discussionmentioning

confidence: 99%

Silicon-Solubilizing Media and Its Implication for Characterization of Bacteria to Mitigate Biotic Stress

et al. 2020

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Silicon (Si), the second most abundant element on earth, remains unavailable for plants' uptake due to its poor solubility. Microbial interventions to convert it in soluble forms are well documented. However, studies on discrimination of Si and P solubilizing microbes due to common estimation method and sharing of solubilization mechanism are still obscure. A defined differential media, i.e. silicon-solubilizing media (NBRISSM) is developed to screen Si solubilizers. NBRISN13 (Bacillus amyloliquefaciens), a Si solubilizer, exhibiting antagonistic property against Rhizoctonia solani, was further validated for disease resistance. The key finding of the work is that NBRISSM is a novel differential media for screening Si solubilizers, distinct from P solubilizers. Dominance of Pseudomonas and Bacillus spp. for the function of Si solubilization was observed during diversity analysis of Si solubilizers isolated from different rhizospheres. Sphingobacterium sp., a different strain has been identified for silicon solubilization other than Pseudomonas and Bacillus sp. Role of acidic phosphatase during Si solubilization has been firstly reported in our study in addition to other pH dependent phenomenon. Study also showed the combinatorial effect of feldspar and NBRISN13 on elicited immune response through (i) increased Si uptake, (ii) reduced disease severity, (iii) modulation of cell wall degrading and antioxidative enzyme activities, and (iv) induced defense responsive gene expression.

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Section: Discussionmentioning

confidence: 99%

Silicon-Solubilizing Media and Its Implication for Characterization of Bacteria to Mitigate Biotic Stress

et al. 2020

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“…Mutu pupuk silika yang tersedia di pasar saat ini beragam dan umumnya mengandung Si-terlarut rendah (≤1%). Kegiatan riset pendahuluan yang dilakukan di Pusat Penelitian Bioteknologi dan Bioindustri Indonesia telah memperoleh Si dalam bentuk cair yang prospektif untuk meningkatkan ketahanan tanaman kelapa sawit terhadap cekaman kekeringan dan/atau keracunan Al (Santi et al 2017a).…”

Section: Pendahuluanunclassified

Pengaruh Bio-Nano Silika Terhadap Hasil dan Efisiensi Penggunaan Air Kedelai Hitam di Lahan Kering Masam

Santi¹,

Goenadi²,

Barus³

et al. 2020

J. Tanah dan Iklim

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Kebutuhan kedelai hitam nasional masih tergantung pada pasokan dari luar negeri dan terkendala oleh rendahnya produktivitas. Oleh karena itu, pemanfaatan lahan marginal secara optimal perlu didorong untuk budidaya kedelai hitam. Optimalisasi lahan kering masam dihadapkan pada faktor utama pembatas tanah antara lain kemasaman tanah tinggi, air tersedia terbatas, dan efisiensi penggunaan unsur hara rendah. Silika (Si) dalam bentuk yang siap diserap oleh tanaman (asam silikat) mampu meningkatkan toleransi tanaman terhadap cekaman kekeringan dan meningkatkan efisiensi penggunaan hara. Tujuan penelitian ini untuk mengetahui pengaruh aplikasi bio-nano silika di lahan kering yang bereaksi masam terhadap: (i) hasil kedelai hitam, dan (ii) efisiensi penggunaan air. Kegiatan lapang dilaksanakan di Jatitujuh, Majalengka, Jawa Barat, pada bulan Juli-Oktober 2017 dengan menggunakan rancangan acak kelompok (RAK). Pupuk bio-nano silika diberikan dengan dosis 0, 2, 4, dan 6 l ha-1 , sedang pupuk N, P, dan K tunggal diberikan setara dengan 0, 50, 75, dan 100% dosis rekomendasi. Plot kontrol berupa perlakuan standar petani (100% N, P, dan K + 2 t ha-1 pupuk organik). Plot berukuran 100 m 2 dari setiap perlakuan ditanami kedelai hitam varietas Detam-1. Pupuk bio-nano silika diekstraksi dari pasir kuarsa 325 mesh menggunakan larutan asam dan basa. Pupuk bio-nano silika mengandung kadar H4SiO4 > 5% dengan ukuran partikel 18 nm dan dalam aplikasinya diperkaya dengan mikroorganisme pelarut Si, yaitu Aeromonas punctata, Burkholderia cenocepacia, B. vietnamiensis, dan Aspergillus niger. Hasil percobaan menunjukkan bahwa hasil biji kedelai nyata tertinggi diperoleh pada perlakuan 75% NPK + 2 l bio-nano silika per hektar. Aplikasi 4 l ha-1 bio-nano silika dapat menghemat dosis pupuk N, P, dan K sampai dengan 32%. Sementara aplikasi dengan dosis 6 l ha-1 bio-nano silika dapat meningkatkan hasil kedelai hitam var. Detam-1 sampai dengan 36,7% dan menekan kebutuhan air tanaman hingga 65%.

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“…The solubilization process by fungi occurs mainly via the production of organic acids and complexing agents and it is faster than that of bacteria. In vitro studies in our laboratory indicated that fungi were more efficient in the solubilization of silica as compared to bacteria (Santi et al, 2018). Thus, a very effective approach for silica solubilization in quartz and zeolite as silica sources is the application of fungi capable of excreting organic acid.…”

Section: Introductionmentioning

confidence: 93%

Enhanced solubilization of insoluble silicate from quartz and zeolite minerals by selected Aspergillus and Trichoderma species

Santi¹

2020

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Silicon (Si) is a major component of sand, silt and clay particles of soils. Available silica as silicic acid (H4SiO4) present in soil solution is considerably low, only in the range of 3.5–40.0 mg Si L-1. To improve plant-available Si in the soil, silicate-solubilizing fungi (SSF) are potentially important in solubilizing insoluble forms of silicate (SiO2). The objectives of this study were to determine silicate solubilizing capacity and organic acid produced by seven SSF isolates on Bunt and Rovira media by using 0.25% (w/v) magnesium trisilicate (Mg2O8Si3), quartz, and zeolite as a silica source. Determination of SSF isolates potential in Si solubilization was carried out in a completely randomized design with three silica sources and three replicates. The results indicated that all SSF were capable of producing acetic, citrate, and oxalic acids and enhancing the solubilization of insoluble silicates. Trichoderma polysporum and Aspergillus niger BCCF194 were the best isolates of SSF. Furthermore, there was significantly (p<0.05) positive correlation between solubilizing silicate capacity by using quartz or zeolite as a silica source on Bunt and Rovira media with incubation time (R2 = 0.79-0.99) and citric acid production (R2= 0.97-0.99) from T. polysporum and A. niger BCCF194

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Effect of bio-silica on drought tolerance in plants

Cited by 20 publications

References 36 publications

Silicon-Solubilizing Media and Its Implication for Characterization of Bacteria to Mitigate Biotic Stress

Silicon-Solubilizing Media and Its Implication for Characterization of Bacteria to Mitigate Biotic Stress

Pengaruh Bio-Nano Silika Terhadap Hasil dan Efisiensi Penggunaan Air Kedelai Hitam di Lahan Kering Masam

Enhanced solubilization of insoluble silicate from quartz and zeolite minerals by selected Aspergillus and Trichoderma species

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