Abstract
Presence of potyvirus in single garlic (Allium sativum L.) cloves from the same bulb, and in five single leaves excised from commercial field-grown individual plants was studied using ELISA. It was found that the viruses were not present in all organs of the same plant, since some cloves of the same bulb were infected with potyvirus but some others were potyvirus-free. Analyzed leaves from a given plant also exhibited irregular distribution of potyvirus. This study also aimed to obtain potyvirus-free plants from two commercial garlic cultivars (Taiwan and Chileno) using cloves subjected to thermotherapy, chemotherapy or meristematic dissection followed by in vitro culture. Thermotherapy (sequential treatment at 32°C for a week, 36°C for 2 weeks, and 38°C for 3 weeks) was found to affect survival of explants and 36.5% cloves from Taiwan and 26.8% from Chileno cultivars were recovered after the treatment. ELISA tests showed that 63% of the cloves of Taiwan that survived the treatment and 70.9% of Chileno explants were potyvirus-negative. Regarding chemotherapy (205 µM Ribavirin solution), the explants (cloves) survived, but only an average of 27.0–34.8% were negative for the presence of potyvirus. When meristematic dissection was applied, an average of 41.7% explants of Taiwan and 34.2% of Chileno survived the treatment, and approximately 64% of these explants from both cultivars were potyvirus-negative. Potyvirus-free garlic plants grown in field conditions showed longer stems with a major fresh and dry weight per bulb, and also exhibited a higher yield than non-treated plants.
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We thank Fundación Guanajuato Produce (Mexico), and Aguilares S. P. R. Company, for the financial support to this work.
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Ramírez-Malagón, R., Pérez-Moreno, L., Borodanenko, A. et al. Differential organ infection studies, potyvirus elimination, and field performance of virus-free garlic plants produced by tissue culture. Plant Cell Tiss Organ Cult 86, 103–110 (2006). https://doi.org/10.1007/s11240-006-9102-6
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DOI: https://doi.org/10.1007/s11240-006-9102-6