Response of maize seedling roots to changing ethylene concentrations
Maize roots (Zea mays, cv. DK 626) growing in aerated solutions showed striking variations in the amount of ethylene produced during different stages of development. As endogenous ethylene increases, root elongation decreases. Exogenous 1-aminocyclopropane-1-carboxylic acid (ACC) supplied to these r...
| Main Authors: | , , , , |
|---|---|
| Format: | article |
| Language: | Inglés |
| Published: |
2017
|
| Online Access: | http://hdl.handle.net/20.500.11939/5199 |
| _version_ | 1855032241292312576 |
|---|---|
| author | Alarcón, María V. Lloret, Pedro G. Iglesias, Domingo J. Talón, Manuel Salguero, J. |
| author_browse | Alarcón, María V. Iglesias, Domingo J. Lloret, Pedro G. Salguero, J. Talón, Manuel |
| author_facet | Alarcón, María V. Lloret, Pedro G. Iglesias, Domingo J. Talón, Manuel Salguero, J. |
| author_sort | Alarcón, María V. |
| collection | ReDivia |
| description | Maize roots (Zea mays, cv. DK 626) growing in aerated solutions showed striking variations in the amount of ethylene produced during different stages of development. As endogenous ethylene increases, root elongation decreases. Exogenous 1-aminocyclopropane-1-carboxylic acid (ACC) supplied to these roots also inhibited their elongation and increased both the fresh weight of the apex and the ethylene produced. The inhibitor of ethylene biosynthesis, 2-aminoethoxyvinyl glycine (AVG), and the inhibitor of ethylene action, silver thiosulfate (STS), also reduced growth and increased swelling. As growth diminishes at reduced ethylene concentrations or with impeded ethylene action, these results support the view that ethylene is necessary for root growth. As ACC treatment also inhibited root elongation, it appears that ethylene was inhibitory at both low and high concentrations. Whereas ACC stimulated ethylene production 4 h after the beginning of treatment, inhibition of root elongation and promotion of fresh weight advanced slowly and needed 24 h to be established. At that time, root elongation reached a maximum response of 60% inhibition and 50% increase in weight. At 48 h, higher doses of ACC were required to provoke the same response as at 24 h. This suggests that the root growth progressively accomodates to higher ethylene concentrations. |
| format | article |
| id | ReDivia5199 |
| institution | Instituto Valenciano de Investigaciones Agrarias (IVIA) |
| language | Inglés |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| record_format | dspace |
| spelling | ReDivia51992025-04-25T14:45:38Z Response of maize seedling roots to changing ethylene concentrations Alarcón, María V. Lloret, Pedro G. Iglesias, Domingo J. Talón, Manuel Salguero, J. Maize roots (Zea mays, cv. DK 626) growing in aerated solutions showed striking variations in the amount of ethylene produced during different stages of development. As endogenous ethylene increases, root elongation decreases. Exogenous 1-aminocyclopropane-1-carboxylic acid (ACC) supplied to these roots also inhibited their elongation and increased both the fresh weight of the apex and the ethylene produced. The inhibitor of ethylene biosynthesis, 2-aminoethoxyvinyl glycine (AVG), and the inhibitor of ethylene action, silver thiosulfate (STS), also reduced growth and increased swelling. As growth diminishes at reduced ethylene concentrations or with impeded ethylene action, these results support the view that ethylene is necessary for root growth. As ACC treatment also inhibited root elongation, it appears that ethylene was inhibitory at both low and high concentrations. Whereas ACC stimulated ethylene production 4 h after the beginning of treatment, inhibition of root elongation and promotion of fresh weight advanced slowly and needed 24 h to be established. At that time, root elongation reached a maximum response of 60% inhibition and 50% increase in weight. At 48 h, higher doses of ACC were required to provoke the same response as at 24 h. This suggests that the root growth progressively accomodates to higher ethylene concentrations. 2017-06-01T10:11:53Z 2017-06-01T10:11:53Z 2009 JUL 2009 article Alarcon, M. V., Lloret, P. G., Iglesias, D. J., Talón, M., Salguero, J. (2009). Response of maize seedling roots to changing ethylene concentrations. Russian Journal of Plant Physiology, 56(4), 488-494. 1021-4437; 1608-3407 http://hdl.handle.net/20.500.11939/5199 10.1134/S1021443709040074 en openAccess Impreso |
| spellingShingle | Alarcón, María V. Lloret, Pedro G. Iglesias, Domingo J. Talón, Manuel Salguero, J. Response of maize seedling roots to changing ethylene concentrations |
| title | Response of maize seedling roots to changing ethylene concentrations |
| title_full | Response of maize seedling roots to changing ethylene concentrations |
| title_fullStr | Response of maize seedling roots to changing ethylene concentrations |
| title_full_unstemmed | Response of maize seedling roots to changing ethylene concentrations |
| title_short | Response of maize seedling roots to changing ethylene concentrations |
| title_sort | response of maize seedling roots to changing ethylene concentrations |
| url | http://hdl.handle.net/20.500.11939/5199 |
| work_keys_str_mv | AT alarconmariav responseofmaizeseedlingrootstochangingethyleneconcentrations AT lloretpedrog responseofmaizeseedlingrootstochangingethyleneconcentrations AT iglesiasdomingoj responseofmaizeseedlingrootstochangingethyleneconcentrations AT talonmanuel responseofmaizeseedlingrootstochangingethyleneconcentrations AT salgueroj responseofmaizeseedlingrootstochangingethyleneconcentrations |