Hormonal regulation of dormancy in garlic (Allium sativum L.) cv Rosado Paraguayo
In order to establish the location of the dormancy mechanism and the role played by different growth regulators upon it, garlic seed cloves (in dormant, end of dormancy, and sprouting periods) were cultured in vitro with a nutrient medium and several phytohormones. Also, GA-like (free-acid and gluco...
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| Formato: | Artículo revista |
| Lenguaje: | Inglés |
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Facultad de Ciencias Agropecuarias
1991
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| Acceso en línea: | https://revistas.unc.edu.ar/index.php/agris/article/view/2242 |
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I10-R352-article-2242 |
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I10-R352-article-22422024-08-27T15:40:55Z Hormonal regulation of dormancy in garlic (Allium sativum L.) cv Rosado Paraguayo Regulación hormonal de la dormancia en ajo (Allium sativum L.) cv Rosado Paraguayo Argüello, J . Ledesma, A. Bottini, R. dormancy Giberellins benzyladenine garlic abscisic acid latencia giberelinas benciladenina ajo ácido abscísico In order to establish the location of the dormancy mechanism and the role played by different growth regulators upon it, garlic seed cloves (in dormant, end of dormancy, and sprouting periods) were cultured in vitro with a nutrient medium and several phytohormones. Also, GA-like (free-acid and glucosyl-conjugate), auxin-like, and growth inhibitor-like substances were evaluated. Results showed that cytokinins were active during differentiation processes along dormancy (although the auxin role cannot be discarded); GAs showed to be important at the end of dormancy, perhaps through the activation of carbohydrate mobilization. Auxin-like activity was highly significant by the time tissue expansion began (once the dormant condition had been overcome). Phytohormones (including ABA) should be important in the whole differentiation/growth process due to the noticeable effect obtained with in vitro cultured explants when they were all applied mixed together. Thus, sproutlets would undergo several steps of differentiation (which depend on hormonal, nutritional, and physico-chemical influences from the storage leaf) before sprouting. This dependence is stronger during dormancy and becomes progressively looser as post-harvest time goes by. Para establecer la localización del mecanismo de control de dormición y el papel de diferentes reguladores del crecimiento sobre el mismo, dientes de semilla de ajo (dormidos, en salida de dormición y en brotación) se cultivaron in vitro con medio nutritivo y diversas fitohormonas. También se evaluó la presencia de sustancias tipo GAs (fracciones libres ácidas y conjugados glucosídicos), tipo auxinas y tipo inhibidores del crecimiento. Los resultados mostraron que las citocininas fueron efectivas durante la dormición en los procesos de diferenciación (aunque no se puede descartar el papel de las auxinas); las GAs fueron importantes hacia la salida de dormición, quizás movilizando carbohidratos. La actividad tipo auxinas fue altamente significativa cuando comenzaba la expansión de tejidos (una vez que la condición durmiente había desaparecido). El conjunto de fitohormonas (ABA incluido) parecería ser importante en los procesos de crecimiento/diferenciación, debido al efecto notable de su aplicación en forma de mezcla sobre los explantos cultivados in vitro. Así, las hojas embrionarias deben superar diversos pasos de diferenciación (que dependen de influencias de naturaleza hormonal, nutricional y físico-química por parte de la hoja de reserva) antes de brotar. Facultad de Ciencias Agropecuarias 1991-12-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistas.unc.edu.ar/index.php/agris/article/view/2242 10.31047/1668.298x.v8.n0.2242 AgriScientia; Vol. 8 (1991); 9-14 AgriScientia; Vol. 8 (1991); 9-14 1668-298X 10.31047/1668.298x.v8.n0 eng https://revistas.unc.edu.ar/index.php/agris/article/view/2242/1191 Derechos de autor 1991 J . Arguello, A. Ledesma, R. Bottini https://creativecommons.org/licenses/by-sa/4.0 |
| institution |
Universidad Nacional de Córdoba |
| institution_str |
I-10 |
| repository_str |
R-352 |
| container_title_str |
AgriScientia |
| language |
Inglés |
| format |
Artículo revista |
| topic |
dormancy Giberellins benzyladenine garlic abscisic acid latencia giberelinas benciladenina ajo ácido abscísico |
| spellingShingle |
dormancy Giberellins benzyladenine garlic abscisic acid latencia giberelinas benciladenina ajo ácido abscísico Argüello, J . Ledesma, A. Bottini, R. Hormonal regulation of dormancy in garlic (Allium sativum L.) cv Rosado Paraguayo |
| topic_facet |
dormancy Giberellins benzyladenine garlic abscisic acid latencia giberelinas benciladenina ajo ácido abscísico |
| author |
Argüello, J . Ledesma, A. Bottini, R. |
| author_facet |
Argüello, J . Ledesma, A. Bottini, R. |
| author_sort |
Argüello, J . |
| title |
Hormonal regulation of dormancy in garlic (Allium sativum L.) cv Rosado Paraguayo |
| title_short |
Hormonal regulation of dormancy in garlic (Allium sativum L.) cv Rosado Paraguayo |
| title_full |
Hormonal regulation of dormancy in garlic (Allium sativum L.) cv Rosado Paraguayo |
| title_fullStr |
Hormonal regulation of dormancy in garlic (Allium sativum L.) cv Rosado Paraguayo |
| title_full_unstemmed |
Hormonal regulation of dormancy in garlic (Allium sativum L.) cv Rosado Paraguayo |
| title_sort |
hormonal regulation of dormancy in garlic (allium sativum l.) cv rosado paraguayo |
| description |
In order to establish the location of the dormancy mechanism and the role played by different growth regulators upon it, garlic seed cloves (in dormant, end of dormancy, and sprouting periods) were cultured in vitro with a nutrient medium and several phytohormones. Also, GA-like (free-acid and glucosyl-conjugate), auxin-like, and growth inhibitor-like substances were evaluated. Results showed that cytokinins were active during differentiation processes along dormancy (although the auxin role cannot be discarded); GAs showed to be important at the end of dormancy, perhaps through the activation of carbohydrate mobilization. Auxin-like activity was highly significant by the time tissue expansion began (once the dormant condition had been overcome). Phytohormones (including ABA) should be important in the whole differentiation/growth process due to the noticeable effect obtained with in vitro cultured explants when they were all applied mixed together. Thus, sproutlets would undergo several steps of differentiation (which depend on hormonal, nutritional, and physico-chemical influences from the storage leaf) before sprouting. This dependence is stronger during dormancy and becomes progressively looser as post-harvest time goes by. |
| publisher |
Facultad de Ciencias Agropecuarias |
| publishDate |
1991 |
| url |
https://revistas.unc.edu.ar/index.php/agris/article/view/2242 |
| work_keys_str_mv |
AT arguelloj hormonalregulationofdormancyingarlicalliumsativumlcvrosadoparaguayo AT ledesmaa hormonalregulationofdormancyingarlicalliumsativumlcvrosadoparaguayo AT bottinir hormonalregulationofdormancyingarlicalliumsativumlcvrosadoparaguayo AT arguelloj regulacionhormonaldeladormanciaenajoalliumsativumlcvrosadoparaguayo AT ledesmaa regulacionhormonaldeladormanciaenajoalliumsativumlcvrosadoparaguayo AT bottinir regulacionhormonaldeladormanciaenajoalliumsativumlcvrosadoparaguayo |
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2024-09-03T21:44:43Z |
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2024-09-03T21:44:43Z |
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