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All Journal Biodiversitas Journal of Biological Diversity
MUHAMMAD AKHID SYIB’LI
Department of Plant Pests and Diseases, Faculty of Agriculture, Universitas Brawijaya. Jl. Veteran, Malang 65145, East Java, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Screening of yeast isolates for the biocontrol of Sclerotium rolfsii NURHALIMAH NURHALIMAH; ANTON MUHIBUDDIN; MUHAMMAD AKHID SYIB’LI
Biodiversitas Journal of Biological Diversity Vol. 23 No. 7 (2022)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d230759

Abstract

Abstract. Nurhalimah, Muhibuddin A, Syib’li MA. 2022. Screening of yeast isolates for the biocontrol of Sclerotium rolfsii. Biodiversitas 23: 3820-3826. Sclerotium rolfsii is a fungal pathogen that can reduce peanut production. Biological control with yeast antagonist offers an environment friendly control for this pathogen. The aim of this study was to isolate and identify yeast antagonists, and to study their antagonistic mechanism and potential to control the peanut disease caused by S. rolfsii. The study was conducted from October 2020 to May 2021. The study consisted of four stages: isolation and identification of yeasts, yeasts antagonist testing against S. rolfsii, molecular identification of yeast NH4, and scanning electron microscope observation of NH4 against S. rolfsii. Based on the research, four different yeast isolates were isolated, identified, and found able to be developed as a biological control agent to inhibit the growth of S. rolfsii. Identification showed that NH1 was Saccharomyces sp. with inhibitory percentage of 9,26%, NH2 was Candida sp. with 22,21% inhibition of, NH3 Pichia sp. with 11,11% inhibition of, and NH4 was Wickerhamomyces sp. with an inhibitory percentage of 32,96%. The results of the yeast antagonism mechanism showed that NH1 (Saccharomyces sp.) and NH3 (Pichia sp) had not showed any mechanism while, NH2 (Candida sp.) had a competition and NH4 (Wickerhamomyces sp.) had an antibiosis mechanism. NH4 can suppress the growth of S. rolfsii by more than 30%, which has been identified as species of Wickerhamomyces sp. (NH4) with 99.84% homology with Wickerhamomyces anomalus CBS 5759 with accession number MH545921.1.
Local and landscape effects on the abundance and diversity of soil arthropods in citrus orchards of Malang and Batu, East Java, Indonesia ITO FERNANDO; FAIZ NASHIRUDDIN MUHAMMAD; RAHMAT FURQONI; M. BAYU MARIO; RETNO DYAH PUSPITARINI; IRISA TRIANTI; MUHAMMAD AKHID SYIB’LI; AKHMAD RIZALI
Biodiversitas Journal of Biological Diversity Vol. 25 No. 10 (2024)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d251052

Abstract

Abstract. Fernando I, Muhammad FN, Furqoni R, Mario MB, Puspitarini RD, Trianti I, Syib’li MA, Rizali A. 2024. Local and landscape effects on the abundance and diversity of soil arthropods in citrus orchards of Malang and Batu, East Java, Indonesia. Biodiversitas 25: 3920-3927. Soil arthropods are crucial for sustaining the balance and function of agroecosystems. This study aimed to assess the diversity and abundance of detritivorous and predatory soil arthropods across various citrus orchards that differ in agroecosystem management practices and landscape composition. The study was conducted in nine citrus orchards from November 2023 to January 2024, with soil arthropod samples collected using Berlese funnels. Analysis of Variance (ANOVA) was used to evaluate the effects of management practices (local effects) on soil arthropod diversity and abundance, while Generalized Linear Model (GLM) analysis was employed to assess the effects of landscape composition (landscape effects) on soil arthropod diversity and abundance. Meanwhile, Analysis of Similarity (ANOSIM) based on the Bray-Curtis index was used to evaluate differences in soil arthropod composition. A total of 1,562 individuals were collected, representing 16 families, 11 orders, and 3 classes. Among the predatory groups, the most abundant family was Laelapidae, while Entomobryidae was the most dominant among detritivores. The diversity of both predatory and detritivorous arthropods was not influenced by variations in management practices. However, the abundance and composition of predatory arthropods were influenced by the frequency of organic fertilizer application, while detritivores were affected by weeding treatments. At the landscape scale, predator abundance positively correlated with the number of natural habitat patches and the area of citrus orchards. In contrast, detritivores were not influenced by landscape variables. This study highlights the critical roles of land management practices and landscape composition in shaping the abundance and diversity of soil arthropods.
Co-Authors AKHMAD RIZALI ANTON MUHIBUDDIN FAIZ NASHIRUDDIN MUHAMMAD IRISA TRIANTI ITO FERNANDO M. BAYU MARIO NURHALIMAH NURHALIMAH RAHMAT FURQONI Retno Dyah Puspitarini