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All Journal BIOTROPIA - The Southeast Asian Journal of Tropical Biology Jurnal Riset Perkebunan (JRP)
Mohd Zainudin, Nur Ain Izzati
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology Veterinary

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Microfungi Associated with Leaf Spot of Cocoa in Pahang, Malaysia Mohd Zainudin, Nur Ain Izzati; Rosli , Muhamad Najmi Haikal; Wan Ahmad Kamal, Wan Halimah As-Sa’adiah; Azahar, Nuráin; Nordin, Nor Aisyah; Salleh, Suhaida; Yusof, Mohd Termizi; Ikhsan, Zahlul
Jurnal Riset Perkebunan Vol. 6 No. 1 (2025): Jurnal Riset Perkebunan (JRP)
Publisher : Jurusan Budidaya Perkebunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrp.6.1.36-44.2025

Abstract

Crop diseases caused by fungal infections have significantly impacted cocoa production, leading to substantial economic losses due to ineffective disease management strategies. Leaf spot disease, in particular, threatens cocoa yield and quality, necessitating accurate identification of its causal agents for effective control measures. This study aimed to isolate, identify, and assess the pathogenicity of fungal species associated with cocoa leaf spot disease. A total of 45 microfungal isolates were obtained from infected cocoa leaves and identified to the genus level, including Aspergillus, Clonostachys, Colletotrichum, Curvularia, Diaporthe, Fusarium, Lasiodiplodia, and Nigrospora species. Pathogenicity tests revealed that 12 isolates induced lesions on cocoa leaves, confirming their pathogenic potential. Molecular identification using internal transcribed spacer (ITS) sequence analysis verified the species identity of the pathogenic isolates, with Lasiodiplodia theobromae (B3418) exhibiting the highest virulence, producing lesions of 3.17 ± 0.76 mm. These findings highlight the diverse pathogenic fungi associated with cocoa leaf spot disease. This study provides valuable insights into fungal pathogenicity and can contribute to the development of effective disease management strategies, which can reduce fungal infections and improving cocoa productivity.
DIVERSITY OF ENDOPHYTIC FUNGI ASSOCIATED WITH FRUITS AND LEAVES OF TAMARIND (Tamarindusindica L.) BASED O N ITS RIBOSOMAL DNA SEQUENCES Mohd Zainudin, Nur Ain Izzati; Mohd Zaini, Nurul Asyiqin; Md Nizam, Nurul Huwaidah; Awg Zainal Abidin, Dayang Fatin Zafira; Mohd Nazri, Nor Izanis Azni
BIOTROPIA Vol. 28 No. 3 (2021): BIOTROPIA Vol. 28 No. 3 December 2021
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2021.28.3.1339

Abstract

Plant-associated microbes are among the important natural resources that abundantly exist in natural environment such as endophytic fungi. The studies on endophytic fungi in medicinal plants have allowed the discovery of numerous fungi species and their hidden potentials. Therefore, this study focused on the isolation and identification of endophytic fungi from several plant parts of tamarind such as leaves and fruits. A total of 69 fungal cultures were successfully isolated and identified into 33 distinct species from 14 genera based on morphological characteristics and internal transcribed spacer (ITS) sequence analysis using a Maximum Likelihood method. There were six different species obtained from the genus Colletotrichum (C. aenigma, C. brevisporum, C. cobbittiense, C. fructicola, C. gloeosporioides and C. siamense), and Diaporthe (D. arecae, D. ceratozamiae, D. phaseolorum, D. pseudomangiferae, D. pseudooculi  and D. pseudophoenicicola), four species of Aspergillus (A. aculeatus, A. carbonarius, A. flavus and A. tubingensis), three species of Curvularia (C. aeria , C. geniculata and C. lunata) and Nigrospora (N. lacticolonia, N. oryzae and N. sphaerica), two species of Lasiodiplodia (L. pseudotheobromae and L. theobromae) and Penicillium (P. rolfsii and P. verruculosum). Other fungal species that were also identified are Botryosphaeria mamane, Fusarium solani, Perenniporia tephropora, Phyllosticta fallopiae, Sarcostroma bisetulatum, Trichoderma asperellum and Xylaria feejeensis. The isolates were grouped into different clades according to their class. In conclusion, endophytic fungi isolated from tamarind plant are diverse and provides an insight into species diversity of endophytic fungi in tamarind.
Co-Authors Awg Zainal Abidin, Dayang Fatin Zafira Azahar, Nuráin Md Nizam, Nurul Huwaidah Mohd Nazri, Nor Izanis Azni Mohd Zaini, Nurul Asyiqin Nordin, Nor Aisyah Rosli , Muhamad Najmi Haikal Salleh, Suhaida Wan Ahmad Kamal, Wan Halimah As-Sa’adiah Yusof, Mohd Termizi Zahlul Ikhsan