* Corresponding Author
Unravelling The Diversity of Cherry Tomato (Solanum Lycopersicum Var. Cerasiforme) Seed Microbes and Their Effect on Seed Health
https://doi.org/10.22146/jtbb.84919 Herbert Dustin Aumentado(1), Jennelyn Bengoa(2), Mark Angelo Balendres(3*)
(1) Institute of Plant Breeding, College of Agriculture and Food Science, University of the Philippines, Los Baños 4031, Laguna, Philippines; School of Science; Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand
(2) Institute of Plant Breeding, College of Agriculture and Food Science, University of the Philippines, Los Baños 4031, Laguna, Philippines
(3) Institute of Plant Breeding, College of Agriculture and Food Science, University of the Philippines, Los Baños 4031, Laguna, Philippines; Department of Biology, College of Science, De La Salle University 1004, Manila, Philippines; Plant and Soil Health Research Unit, Center for Natural Sciences and Environmental Research, De La Salle University 1004, Manila, Philippines
(*) Corresponding Author
Abstract
Healthy seeds are the foundation of healthy plants. Planting healthy seeds contributes to securing crop productivity and seed germplasm conservation. In this study, we have identified microbes associated with seeds of three cherry tomato genotypes and demonstrated their negative effect on general seed health. Through a combined morpho-cultural and molecular characterisation (using multi-loci analysis of the ITS, β-tubulin, tef1α, and gapdh gene regions for fungi and 16s rDNA for bacteria), we have identified three fungi (Nigrospora sphaerica, N. lacticolonia, and Curvularia aeria), and two bacteria (Citrobacter freundii, and Stenotrophomonas maltophilia) from healthy-looking tomato seeds. These fungi and bacteria, through seed-soaked-inoculation, caused seed discoloration, lesions, and low germination. To our knowledge, these are the first reports of Nigrospora sphaerica, N. lacticolonia, Curvularia aeria, Citrobacter freundii, and Stenotrophomonas maltophilia on tomato seeds and demonstrated their negative impact on seed health. Seed treatment and interventions are needed to negate the possible effect of these microbes. Future studies on possible seed transmission are warranted.
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DOI: https://doi.org/10.22146/jtbb.84919
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