In vitro organogenesis in tomato cultivars is enhanced by gas exchange and application of ultrasound / A organogênese in vitro de cultivares de tomate é aumentada pela promoção das trocas gasosas e ultrassom

• Autor(a) principal: Fernandes, Denise
• Data de Publicação: 2020
• Outros Autores: Silva Freitas, Débora Márcia, Batista, Diego Silva, Saldanha, Cleber Witt, Santos, Jéssica Costa, Pompelli, Marcelo Francisco, Otoni, Wagner Campos
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Revista Veras
• DOI: 10.34117/bjdv6n1-047
• Texto Completo: https://ojs.brazilianjournals.com.br/ojs/index.php/BRJD/article/view/6065
• topic: gas exchange; plant regeneration; ultrasound; micropropagation

The success of in vitro regeneration protocols is dependent of biological, chemical and physical factors. The manipulation of the microenvironment by enhancing gas exchange and ultrasound are physical improvements that potentially contribute to optimize in vitro responses. The present study evaluated the effect of gas exchange, by natural ventilation, on in vitro germination and further regeneration competence of explants exposed to sonication. For this, three tomato genotypes ‘Moneymaker’, ‘NCEBR-2’ and ‘Santa Clara’. Cotyledonary and hypocotiledonary explants were subjected to ultrasound times (0, 3, 6, and 9 seconds) in order to figure out its influence on morphogenesis and regeneration. The results appoint the higher that gas exchange increased morphogenic growth responses in all the genotypes with a significant increase in cotyledon area and hypocotyl length in germination and biomass accumulation. The sonication time influenced the number of shoots higher than 0.5 cm and number of leaflets, showing an interaction between sonication and sealing type, highlighting the effect of exposure time to sonication on morphogenesis. In this study, we show for the first time the stimulation of organogenesis by the interaction of physical factors in in vitro culture: the use of high quality explants, obtained by enhanced gas exchange and the application of ultrasound. We suggest that these factors significant increase the quantity of organogenesis and reducing the time consumed in the in vitro process, using simple, reliable and cheap treatments as gas exchange facilitators caps and ultrasound.