D. M. De Costa

Molecular detection and identification of phytoplasmas associated with tomato diseases in Sri Lanka

Keshiga Gangeyan, Christy Jeyaseelan Emmanuel, D. M. De Costa

Tomato cultivation in Sri Lanka is increasingly threatened by phytoplasma infections. In recent years, phytoplasma-like symptoms have been frequently observed in tomato fields across diverse agro-climatic regions of the country. This study assessed the incidence of these symptoms and identified the associated …

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Characterization of phosphate solubilizing bacteria from rice (Oryza sativa L.) rhizosphere soils and their potential for plant growth promotion

P.B.D. Jeewanthi, Warshi Shamila Dandeniya, Randombage Saman Dharmakeerthi, D. M. De Costa

Agricultural soils contain substantial amount of phosphorous (P) in complexed-forms that have gradually accumulated through repeated P-fertilization events. Reliance on chemical P-fertilizers in crop production can be reduced by mobilizing P from soil reserves. Biofertilizers containing phosphate solubilizing bacteria (PSB) are considered …

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Anthracnose of grapevines in Sri Lanka: Pathogen identification, epidemiological insights, and in vitro evaluation of bioactive extracts

Deluxeani Sureshkumar, Christy Jeyaseelan Emmanuel, D. M. De Costa

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Telomerase reverse transcriptase is required for resistance to mycobacterial infection

Darryl JY Han, D. M. De Costa, Geyang Luo, Kathryn Wright et autres

Abstract Age is an important risk factor for infections such as tuberculosis (TB). Telomerase is expressed in immune cells yet leukocyte telomere length declines during ageing suggesting an age-dependent loss of telomerase activity in the immune system. Leukocyte telomere length has been …

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PHYTOTHERAPY USED IN AFRO-INDIGENOUS COMMUNITIES FOR ANIMALS AND PEOPLE

D. M. De Costa, Sérgio Ricardo de Andrade Virgínio, João Vinícius Barbosa Roberto, Maria das Graças Nogueira Ferreira et autres

Ethnobotany is the ethnographic study of plants and herbs passed down through the oral tradition of a particular ethnic group. The African Brazilian religion, Candomblé, keeps and transmits medicinal knowledge in its practices, such as the use of herbs and plants, which, …

Development of a Scalable Extraction Process for Anthocyanins of Haskap Berry (Lonicera caerulea)

D. M. De Costa, H.P. Vasantha Rupasinghe

Haskap (Lonicera caerulea) berry is rich in anthocyanins, particularly cyanidin-3-O-glucoside (C3G). In this investigation, a response surface methodology was applied to optimize the anhydrous ethanol-based extraction parameters to obtain the maximum yield of anthocyanins from haskap berry and to compare the recovery …

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Evaluating the growth-promoting potential of Trichoderma virens on rice plants ( Oryza sativa L. ) under in-vitro and semi in-vivo conditions

Tikka Dewage Chamarika Priyadarshani, Dinayadura Dulanji Naveesha Karunarathna, Walikande Wijesundara Mohottalalage Thariduni Chathurangika Kumarihami Wijesundar, W. C. P. Egodawatta et autres

The remarkable ability of Trichoderma virens (J.H. Mill., Giddens & A.A. Foster) Arx to promote plant growth presents a promising solution for agriculture. This study evaluated the efficacy of T. virens for rice growth promotion under in-vitro and semi in-vivo conditions (pot …

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Morphometric Taxonomy of Meloidogyne spp. Infesting Vegetable Crops in Sri Lanka via Female Perineal Pattern Analysis

K. M. D. W. P. Nishantha, M.M. Nugaliyadde, D. M. De Costa, L. Nugaliyadde et autres

Meloidogyne spp. are among the most significant plant-parasitic nematodes in agriculture, necessitating precise identification for effective management. This study aimed to identify and taxonomically characterize Meloidogyne spp. infesting vegetable crops in Sri Lanka using female perineal pattern analysis. A total of 54 …

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Integration of Morphology and the Mitochondrial Cox1 Gene to Identify Killifishes, Aplocheilus Species, in the Attanagalu River, Sri Lanka

A.M.R.G. Athapaththu, Christy Jeyaseelan Emmanuel, U. P. K. Epa, D. M. De Costa

Aplocheilus species, often known as killifishes, are popular in the aquarium trade and are used as biological control agents for mosquito larvae. They are endemic to Madagascar, Seychelles, and South-East Asia. Aplocheilus species were collected from the Attanagalu River in Sri Lanka, …

Multi-environmental Screening of Mungbean for Reaction to Yellow Mosaic Virus Disease to Identify Stable Resistant Genotypes by Assessing GE Interaction

M. J. M. P. Kumararathna, D. S. de Z. Abeysiriwardena, D. M. De Costa, D. M. J. B. Senanayake et autres

Mungbean is an important legume crop cultivated in Sri Lanka. Yellow mosaic virus disease (YMVD) is the major distructive disease affecting mungbean cultivation. Screening of 60 genotypes of mungbean was performed following infector row method over six environments representing Norhern, Suthern and …

In silico screening and in vivo testing of nitrone compounds to reduce insulin resistance in a mouse model of diet-induced obesity

Inalen Chacón, Carla Florencia Guzman, Florencia S. Barrera, Cristofer Martín Lopez et autres

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Total Lipid Content and Fatty Acid Composition of Two Morphologically Distinct Chlorella spp. for Biodiesel Production

S.M.D.C. Bandara, D. M. De Costa, R.R. Ratnayake

This study investigated the potential of two morphologically distinct Chlorella spp. to assess the total lipid content and fatty acid composition targeting biodiesel production. Due to their rapid growth, less space requirement, and zero-conflict with current food demand, green microalgae-led biodiesel production …

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