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Papers by Rene Carlos Rodriguez Escriba

Plant Cell, Tissue and Organ Culture (PCTOC), 2020

Sugarcane cultivation is of great economic and social importance worldwide. In vitro cloning usin... more Sugarcane cultivation is of great economic and social importance worldwide. In vitro cloning using temporary immersion systems is an option to produce vitroplants of high genetic and phytosanitary quality to establish stock seedbeds. However, the sterilization of culture media through autoclaving increases production costs and limits the efficiency of temporary immersion systems. For that reason, the objective of this study was to evaluate the morphological and physiological changes caused by Vitrofural® in sugarcane plants under temporary immersion. We compared two types of culture media sterilization: chemical sterilization using Vitrofural® and autoclaving using Temporary Immersion Bioreactors. After four weeks of cultivation, we evaluated morphological (number of shoots, shoot length, and number of leaves per shoot) and physiological indicators (soluble and bound phenolics, and phenolics excreted to the culture medium). As well as chlorophyll-a, -b and total chlorophyll content. The results show that when Vitrofural® was added to culture medium, a higher number of shoots per explant, length of the shoots and number of leaves were observed in comparison with the shoots obtained in autoclaved sterilized medium. Furthermore, a reduced the amount of phenolics compounds were found in Vitrofural® treatent .In addition, the use of the Vitrofural® increased the synthesis of photosynthetic pigments respect to autoclaving. In conclusion, Vitrofural® has a positive effect in morphological and physiological of sugarcane cultured in vitro and is a low-cost alternative for the commercial micropropagation of sugarcane. Vitrofural® produced a positive effect on the growth, content of photosynthetic pigments and compounds phenols during in vitro culture of sugar cane.

African Journal of Biotechnology, 2015

Plant regeneration of papaya via organogenesis and somatic embryogenesis has been successful; how... more Plant regeneration of papaya via organogenesis and somatic embryogenesis has been successful; however, the biggest problem of in vitro culture of this species is the acclimatization of regenerated plants, where over 70% of the plants are lost before being planted in the field. Decreasing the relative humidity inside the culture vessel and thus increasing the ventilation, appears to have a greater effect on the adaptation of papaya plants, strengthening the function of the stomata and with this, allowing better control of water loss from the leaves. The aim of this study was to determine the effects of different concentrations of sucrose and indole-butyric acid (IBA) on rooting and in vitro acclimatization of plants using sterile zeolite as support and culture vessels with increased ventilation. Three concentrations of sucrose (0, 10 and 20 g L-1) were studied with and without auxin and as the control treatment, the rooting culture medium with agar during 17, 27 and 37 culture days. The highest percentage of rooting was recorded at 37 culture days in the treatment without sucrose and IBA with 80.0% and zeolite as support. The best photosynthetic values were achieved when in vitro shoots were grown in culture medium with auxin and different concentrations of sucrose, even though they were also high in the treatment without the presence of IBA and without sucrose at 17 days of culture. The combined effect of the zeolite, auxin (IBA), without sucrose in the culture medium and increased ventilation allowed photoautotrophic culture conditions which had effect of the increasing plant survival under ex vitro acclimatization conditions.

Cultivos Tropicales, Jun 9, 2016

RESUMEN. La presente investigación tuvo como objetivo determinar el efecto de la madurez en la cr... more RESUMEN. La presente investigación tuvo como objetivo determinar el efecto de la madurez en la crioconservación de semillas de Nicotiana tabacum L. cv Sancti Spíritus 96 (SS-96). El estudio se realizó en la Estación experimental del tabaco de Cabaiguán, Sancti Spíritus, perteneciente al Instituto de Investigaciones del Tabaco, entre los años 2012 y 2014. Las semillas de SS-96 se colectaron a los 14, 21, 28, 35, 42, 49 y 56 días después de la antesis (DDA) y se les determinó masa fresca y masa seca de 1000 semillas, porcentaje de humedad (base masa fresca) y potencia germinativa (PG), además de evaluar su tolerancia a la desecación. Al mismo tiempo, semillas de cada día de colecta se conservaron a 5 oC o en nitrógeno líquido y, transcurridos 30 días, les fue evaluada su PG y se sometieron a las pruebas de envejecimiento acelerado y pérdida de electrólitos. Durante el desarrollo de la investigación se determinó que la madurez fisiológica de las semillas de SS-96 se alcanza a los 29,6 ...

In Vitro Cellular & Developmental Biology - Plant, 2017

Cryopreservation is a valuable technique for the long-term conservation of plant germplasm and co... more Cryopreservation is a valuable technique for the long-term conservation of plant germplasm and complementary to traditional seed storage methods. However, critical factors such as seed moisture content should be optimized before using this technique as a safe strategy for storing seeds such as those of Nicotiana spp. This study aimed to determine the effect of desiccation on physiological and biochemical indicators associated with germination and vigor in cryopreserved seeds of Nicotiana tabacum cv. Sancti Spíritus 96 (SS-96). The germination and vigor of seeds with a range of moisture content were assessed using electrolyte leakage and accelerated aging tests. In addition, these physiological indicators were related to the oxidative state of the seeds, in terms of the rate of O 2 •− generation and the H 2 O 2 content, and the activity of enzymatic antioxidants superoxide dismutase and catalase. The cryopreserved seeds of N. tabacum SS-96 with a moisture content of 2.1% exhibited higher vigor probably due to the retention of membrane integrity, reflected by lower levels of lipid peroxidation and electrolyte leakage associated with the absence of oxidative stress. The results suggest 2.1% as the optimal moisture content for the storage of seeds of this cultivar, both at cryogenic temperatures and at 5°C.

In Vitro Cellular & Developmental Biology - Plant, 2015

Plant Cell, Tissue and Organ Culture (PCTOC), 2020

Sugarcane cultivation is of great economic and social importance worldwide. In vitro cloning usin... more Sugarcane cultivation is of great economic and social importance worldwide. In vitro cloning using temporary immersion systems is an option to produce vitroplants of high genetic and phytosanitary quality to establish stock seedbeds. However, the sterilization of culture media through autoclaving increases production costs and limits the efficiency of temporary immersion systems. For that reason, the objective of this study was to evaluate the morphological and physiological changes caused by Vitrofural® in sugarcane plants under temporary immersion. We compared two types of culture media sterilization: chemical sterilization using Vitrofural® and autoclaving using Temporary Immersion Bioreactors. After four weeks of cultivation, we evaluated morphological (number of shoots, shoot length, and number of leaves per shoot) and physiological indicators (soluble and bound phenolics, and phenolics excreted to the culture medium). As well as chlorophyll-a, -b and total chlorophyll content. The results show that when Vitrofural® was added to culture medium, a higher number of shoots per explant, length of the shoots and number of leaves were observed in comparison with the shoots obtained in autoclaved sterilized medium. Furthermore, a reduced the amount of phenolics compounds were found in Vitrofural® treatent .In addition, the use of the Vitrofural® increased the synthesis of photosynthetic pigments respect to autoclaving. In conclusion, Vitrofural® has a positive effect in morphological and physiological of sugarcane cultured in vitro and is a low-cost alternative for the commercial micropropagation of sugarcane. Vitrofural® produced a positive effect on the growth, content of photosynthetic pigments and compounds phenols during in vitro culture of sugar cane.

African Journal of Biotechnology, 2015

Plant regeneration of papaya via organogenesis and somatic embryogenesis has been successful; how... more Plant regeneration of papaya via organogenesis and somatic embryogenesis has been successful; however, the biggest problem of in vitro culture of this species is the acclimatization of regenerated plants, where over 70% of the plants are lost before being planted in the field. Decreasing the relative humidity inside the culture vessel and thus increasing the ventilation, appears to have a greater effect on the adaptation of papaya plants, strengthening the function of the stomata and with this, allowing better control of water loss from the leaves. The aim of this study was to determine the effects of different concentrations of sucrose and indole-butyric acid (IBA) on rooting and in vitro acclimatization of plants using sterile zeolite as support and culture vessels with increased ventilation. Three concentrations of sucrose (0, 10 and 20 g L-1) were studied with and without auxin and as the control treatment, the rooting culture medium with agar during 17, 27 and 37 culture days. The highest percentage of rooting was recorded at 37 culture days in the treatment without sucrose and IBA with 80.0% and zeolite as support. The best photosynthetic values were achieved when in vitro shoots were grown in culture medium with auxin and different concentrations of sucrose, even though they were also high in the treatment without the presence of IBA and without sucrose at 17 days of culture. The combined effect of the zeolite, auxin (IBA), without sucrose in the culture medium and increased ventilation allowed photoautotrophic culture conditions which had effect of the increasing plant survival under ex vitro acclimatization conditions.

Cultivos Tropicales, Jun 9, 2016

RESUMEN. La presente investigación tuvo como objetivo determinar el efecto de la madurez en la cr... more RESUMEN. La presente investigación tuvo como objetivo determinar el efecto de la madurez en la crioconservación de semillas de Nicotiana tabacum L. cv Sancti Spíritus 96 (SS-96). El estudio se realizó en la Estación experimental del tabaco de Cabaiguán, Sancti Spíritus, perteneciente al Instituto de Investigaciones del Tabaco, entre los años 2012 y 2014. Las semillas de SS-96 se colectaron a los 14, 21, 28, 35, 42, 49 y 56 días después de la antesis (DDA) y se les determinó masa fresca y masa seca de 1000 semillas, porcentaje de humedad (base masa fresca) y potencia germinativa (PG), además de evaluar su tolerancia a la desecación. Al mismo tiempo, semillas de cada día de colecta se conservaron a 5 oC o en nitrógeno líquido y, transcurridos 30 días, les fue evaluada su PG y se sometieron a las pruebas de envejecimiento acelerado y pérdida de electrólitos. Durante el desarrollo de la investigación se determinó que la madurez fisiológica de las semillas de SS-96 se alcanza a los 29,6 ...

In Vitro Cellular & Developmental Biology - Plant, 2017

Cryopreservation is a valuable technique for the long-term conservation of plant germplasm and co... more Cryopreservation is a valuable technique for the long-term conservation of plant germplasm and complementary to traditional seed storage methods. However, critical factors such as seed moisture content should be optimized before using this technique as a safe strategy for storing seeds such as those of Nicotiana spp. This study aimed to determine the effect of desiccation on physiological and biochemical indicators associated with germination and vigor in cryopreserved seeds of Nicotiana tabacum cv. Sancti Spíritus 96 (SS-96). The germination and vigor of seeds with a range of moisture content were assessed using electrolyte leakage and accelerated aging tests. In addition, these physiological indicators were related to the oxidative state of the seeds, in terms of the rate of O 2 •− generation and the H 2 O 2 content, and the activity of enzymatic antioxidants superoxide dismutase and catalase. The cryopreserved seeds of N. tabacum SS-96 with a moisture content of 2.1% exhibited higher vigor probably due to the retention of membrane integrity, reflected by lower levels of lipid peroxidation and electrolyte leakage associated with the absence of oxidative stress. The results suggest 2.1% as the optimal moisture content for the storage of seeds of this cultivar, both at cryogenic temperatures and at 5°C.

In Vitro Cellular & Developmental Biology - Plant, 2015