Endogenous growth inhibitors, nodulation and nitrogen fixation in soybean under drought and treated with gibberellic acid and abscisic acid
Soybean plants (Glycine max L. Merrill) that had reached full nodulation were submitted to physiological water stress by using polyethylene glycol (PEG 6000). Gibberellin A and/or abscisic acid were sprayed in an attempt to alleviate or mimic the stress. After rewatering the plants, endogenous growt...
| Main Authors: | , , , , , |
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| Format: | Online |
| Language: | eng |
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Facultad de Ciencias Agropecuarias
1990
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| Subjects: | |
| Online Access: | https://revistas.unc.edu.ar/index.php/agris/article/view/937 |
| _version_ | 1841310418292703232 |
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| author | Racca, R. W. Arguello, J. A. Núñez, S. B. Luna, V. Frioni, L. Bottini, R. |
| author_facet | Racca, R. W. Arguello, J. A. Núñez, S. B. Luna, V. Frioni, L. Bottini, R. |
| author_sort | Racca, R. W. |
| collection | Portal de Revistas |
| description | Soybean plants (Glycine max L. Merrill) that had reached full nodulation were submitted to physiological water stress by using polyethylene glycol (PEG 6000). Gibberellin A and/or abscisic acid were sprayed in an attempt to alleviate or mimic the stress. After rewatering the plants, endogenous growth inhibitors in the root system, nitrogenase activity (as per root or nodule basis), number of nodules per plant, and the fresh and dry weight of nodules and roots per plant and per treatment were investigated. Drought depressed both nodulation and nitrogenase activity and increased the levels of growth inhibitors in roots. However, ABA increased symbiotic N2 fixation activity in control plants growing in field capacity and also partially reversed the deleterious effects of drought. Gibberellin A had no action on control plants but annulled the effects of ABA. There was no correlation between the levels of growth inhibitors promoted by exogenous application of growth regulators and the nitrogenase activity and weight of nodules. Thus, the diminution in nodulation and the reductive capacity of the system is not due to inhibitors accumulated in roots by the effect of drought. |
| format | Online |
| id | oai:ojs.revistas.unc.edu.ar:article-937 |
| institution | Universidad Nacional de Cordoba |
| language | eng |
| publishDate | 1990 |
| publisher | Facultad de Ciencias Agropecuarias |
| record_format | ojs |
| spelling | oai:ojs.revistas.unc.edu.ar:article-9372025-06-03T15:33:31Z Endogenous growth inhibitors, nodulation and nitrogen fixation in soybean under drought and treated with gibberellic acid and abscisic acid Inhibidores endógenos del crecimiento, nodulación y fijación de nitrógeno en soja bajo sequía y tratada con ácido giberélico y ácido abscísico Racca, R. W. Arguello, J. A. Núñez, S. B. Luna, V. Frioni, L. Bottini, R. endogenous growth inhibitors nodulation nitrogen fixation inhibidores del crecimiento endógeno nodulación fijación de nitrógeno Soybean plants (Glycine max L. Merrill) that had reached full nodulation were submitted to physiological water stress by using polyethylene glycol (PEG 6000). Gibberellin A and/or abscisic acid were sprayed in an attempt to alleviate or mimic the stress. After rewatering the plants, endogenous growth inhibitors in the root system, nitrogenase activity (as per root or nodule basis), number of nodules per plant, and the fresh and dry weight of nodules and roots per plant and per treatment were investigated. Drought depressed both nodulation and nitrogenase activity and increased the levels of growth inhibitors in roots. However, ABA increased symbiotic N2 fixation activity in control plants growing in field capacity and also partially reversed the deleterious effects of drought. Gibberellin A had no action on control plants but annulled the effects of ABA. There was no correlation between the levels of growth inhibitors promoted by exogenous application of growth regulators and the nitrogenase activity and weight of nodules. Thus, the diminution in nodulation and the reductive capacity of the system is not due to inhibitors accumulated in roots by the effect of drought. Plantas de soja (Glycine maxL. MERRILL) que habían alcanzado máxima nodulación fueron sometidas a stress hídrico mediante el uso de polietilenglicol (PEG 6000) y asperjadas con Giberelina A3 y/o ácido abscísico con el objeto de mitigar o simular el stress. Luego que las plantas fueron regadas nuevamente, se determinó el nivel de inhibidores del crecimiento endógeno en el sistema radical, la actividad nitrogenasa (tanto por raíz como por nódulo ), el número de nódulos por planta y los pesos fresco y seco de nódulos y raíces por planta y por tratamiento. La sequía disminuyó la nodulación y la actividad nitrogenasa , aumentando los niveles de Inhibidores endógenos en raíces. Sin embargo , el ABA aumentó la fijación simbiótica de nitrógeno en las plantas control crecidas en capacidad de campo , y también revirtió parcialmente el efecto deletéreo de la sequía . Giberelina A3 no tuvo ningún efecto sobre las plantas control pero anuló la acción del ABA. No hubo correlación entre los niveles de inhibidores promovidos poraplicación exógena de reguladores del crecimiento, la actividad nitrogenasa y el peso de los nódulos. Facultad de Ciencias Agropecuarias 1990-12-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistas.unc.edu.ar/index.php/agris/article/view/937 10.31047/1668.298x.v7.n1.937 AgriScientia; Vol. 7 (1990); 13-17 AgriScientia; Vol. 7 (1990); 13-17 1668-298X 10.31047/1668.298x.v7.n1 eng https://revistas.unc.edu.ar/index.php/agris/article/view/937/871 Derechos de autor 1990 R. W. Racca, J. A. Arguello, S. B. Núñez, V. Luna, L. Frioni, R. Bottini https://creativecommons.org/licenses/by-sa/4.0 |
| spellingShingle | endogenous growth inhibitors nodulation nitrogen fixation inhibidores del crecimiento endógeno nodulación fijación de nitrógeno Racca, R. W. Arguello, J. A. Núñez, S. B. Luna, V. Frioni, L. Bottini, R. Endogenous growth inhibitors, nodulation and nitrogen fixation in soybean under drought and treated with gibberellic acid and abscisic acid |
| title | Endogenous growth inhibitors, nodulation and nitrogen fixation in soybean under drought and treated with gibberellic acid and abscisic acid |
| title_alt | Inhibidores endógenos del crecimiento, nodulación y fijación de nitrógeno en soja bajo sequía y tratada con ácido giberélico y ácido abscísico |
| title_full | Endogenous growth inhibitors, nodulation and nitrogen fixation in soybean under drought and treated with gibberellic acid and abscisic acid |
| title_fullStr | Endogenous growth inhibitors, nodulation and nitrogen fixation in soybean under drought and treated with gibberellic acid and abscisic acid |
| title_full_unstemmed | Endogenous growth inhibitors, nodulation and nitrogen fixation in soybean under drought and treated with gibberellic acid and abscisic acid |
| title_short | Endogenous growth inhibitors, nodulation and nitrogen fixation in soybean under drought and treated with gibberellic acid and abscisic acid |
| title_sort | endogenous growth inhibitors nodulation and nitrogen fixation in soybean under drought and treated with gibberellic acid and abscisic acid |
| topic | endogenous growth inhibitors nodulation nitrogen fixation inhibidores del crecimiento endógeno nodulación fijación de nitrógeno |
| topic_facet | endogenous growth inhibitors nodulation nitrogen fixation inhibidores del crecimiento endógeno nodulación fijación de nitrógeno |
| url | https://revistas.unc.edu.ar/index.php/agris/article/view/937 |
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