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All Journal Plantropica: Journal of Agricultural Science International Journal of Health Science and Technology
Susila, Wisnu Adhi
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Agriculture, Biological Sciences & Forestry Humanities Engineering Health Professions Nursing Public Health

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Inhibition of Gliocladium sp against plant pathogenic fungus and their exoenzyme activity Fardhani, Dinar Mindrati; Fuadiyah, Dzakiya Alda; Susila, Wisnu Adhi; Nugraheni, Ika Afifah
International Journal of Health Science and Technology Vol. 6 No. 1 (2024): July
Publisher : Universitas 'Aisyiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31101/ijhst.v6i1.3312

Abstract

Gliocladium sp. It is known to have an antagonistic mechanism against other organisms by means of hyper parasitism, antibiosis and lysis, as well as competition. This study aims to determine the effectiveness of Gliocladium sp. in inhibiting several types of plant pathogenic fungi and their exoenzyme activity. Inhibition testing was carried out by the Dual Culture Assay method on several plant pathogenic fungi including Colletotrichum gloeosporioides, Rhizoctonia solani, Fusarium sp., and Phytophthora sp. The exoenzyme activity tested includes cellulolytic tests, amylolytic tests, and chitinolytic tests. Antagonist testing showed that Gliocladium sp. able to inhibit the growth of all pathogenic fungi tested with varying percentage of inhibition. High percentage of inhibition was shown in the pathogens Colletotrichum gloeosporioides and Rhizoctonia solani with percentages of 78.75% and 75%, respectively. Then, the antagonist activity against Fusarium sp. has a moderate resistance percentage of 56%. Meanwhile, a low percentage of inhibition is shown in Gliocladium sp. against Phytophthora sp. with a figure of 25%. From the characterization of exoenzyme activity in Gliocladium sp., negative results were obtained in liquid and solid Carboxymethyl Cellulose, amylum, and chitin media. Meanwhile, in the amylolytic test, positive growth was marked by the appearance of mycelia on the surface of the amylum liquid medium, but in the solid media negative results were obtained against the amylase enzyme. Gliocladium sp fungus has the potential to be a biocontrol agent against various plant pathogenic fungi
Improvement of Tomato Physiological Performance, Growth, and Yield Formation Under Salinity Stress Through Photosynthetic Bacteria Application Christanto, Victor Satrio; Avianto, Yovi; Susila, Wisnu Adhi; Sari, Nur Kartika
Plantropica: Journal of Agricultural Science Vol. 11 No. 2 (2026): Agustus
Publisher : Department of Agronomy, Faculty of Agriculture, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpt.2026.011.2.1

Abstract

Tomato production is frequently constrained by salinity because salt stress restricts water uptake, chlorophyll maintenance, biomass formation, and yield. This study evaluated the effectiveness of the photosynthetic bacterium Rhodobacter sphaeroides BCK1 in improving tomato growth and physiological performance under salinity stress. A 3 × 3 factorial experiment combining three NaCl concentrations (0, 3.000, and 6.000 ppm) and three bacterial suspension doses (0, 10, and 20 ml L-1) was arranged in a completely randomized design with five replicates, resulting in 45 experimental units. Growth, biomass, yield, leaf greenness, relative water content, net assimilation rate, and relative growth rate were evaluated. Salinity significantly reduced most growth, yield, and physiological traits, whereas bacterial application improved these parameters. At 6.000 ppm NaCl, the application of 20 ml L-1 R. sphaeroides BCK1 increased leaf area by approximately 45%, root dry weight by 64%, fruit number by 55%, total fruit weight by 94%, and relative growth rate by 6,5% compared with uninoculated plants exposed to the same salinity level. Net assimilation rate was not significantly affected by salinity (P = 0,337) but increased with bacterial dose (P = 0,0096). The strongest overall response was obtained at 20 ml L-1, indicating that R. sphaeroides BCK1 can partially alleviate salinity-induced reductions in tomato growth and productivity.
Co-Authors Annisa Khumaira Apriliyanto, Toto Avianto, Yovi Christanto, Victor Satrio Dinar Mindrati Fardhani Fuadiyah, Dzakiya Alda Ika Afifah Nugraheni Nosa Septiana Anindita Sari, Nur Kartika widyaningsih, nita