Involvement of abscisic acid and ethylene in the responses of citrus seedlings to salt shock
The responses of salt-sensitive citrus rootstocks to 200 mM NaCl were periodically determined on seedlings of citrange Carrizo (Citrus sinensis [L.] Osbeck x Poncirus trifoliata [L.] Raf) during 30 days. The stressed seedlings adjusted osmotically, reduced stomatal conductance, increased proline con...
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| Format: | article |
| Language: | Inglés |
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2017
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| Online Access: | http://hdl.handle.net/20.500.11939/5296 |
| _version_ | 1855032256371884032 |
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| author | Gómez-Cadenas, Aurelio Tadeo, Francisco R. Primo-Millo, Eduardo Talón, Manuel |
| author_browse | Gómez-Cadenas, Aurelio Primo-Millo, Eduardo Tadeo, Francisco R. Talón, Manuel |
| author_facet | Gómez-Cadenas, Aurelio Tadeo, Francisco R. Primo-Millo, Eduardo Talón, Manuel |
| author_sort | Gómez-Cadenas, Aurelio |
| collection | ReDivia |
| description | The responses of salt-sensitive citrus rootstocks to 200 mM NaCl were periodically determined on seedlings of citrange Carrizo (Citrus sinensis [L.] Osbeck x Poncirus trifoliata [L.] Raf) during 30 days. The stressed seedlings adjusted osmotically, reduced stomatal conductance, increased proline content and ethylene production, and showed massive leaf abscission (92%). The salt shock also increased abscisic acid (ABA) and aminocyclopropane-1-carboxylic acid (ACC) in roots, xylem fluid and leaves, and in addition promoted Cl- accumulation. The pattern of change of ABA, ACC and proline followed a two-phase response: an initial transient increase (10-12 days) overlapping with a gradual and continuous accumulation. This biphasic response appears to be compatible with the proposal that the transitory hormonal rises are induced by the osmotic component of salinity, whereas the Cl- increase determines the subsequent accumulations. During the second phase, Cl- levels correlated with abscission in leaves. Production of leaf ethylene was also concomitant with the increase in the abscission rate. Salt-induced abscission was either reduced with CoCl2 (52%) or inhibited with silver thiosulphate (14%). The results suggest that in salt-stressed citrus, leaf abscission is induced by the chloride build-up through a mechanism that stimulates leaf ACC synthesis and further conversion to ethylene. |
| format | article |
| id | ReDivia5296 |
| institution | Instituto Valenciano de Investigaciones Agrarias (IVIA) |
| language | Inglés |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| record_format | dspace |
| spelling | ReDivia52962025-04-25T14:41:56Z Involvement of abscisic acid and ethylene in the responses of citrus seedlings to salt shock Gómez-Cadenas, Aurelio Tadeo, Francisco R. Primo-Millo, Eduardo Talón, Manuel The responses of salt-sensitive citrus rootstocks to 200 mM NaCl were periodically determined on seedlings of citrange Carrizo (Citrus sinensis [L.] Osbeck x Poncirus trifoliata [L.] Raf) during 30 days. The stressed seedlings adjusted osmotically, reduced stomatal conductance, increased proline content and ethylene production, and showed massive leaf abscission (92%). The salt shock also increased abscisic acid (ABA) and aminocyclopropane-1-carboxylic acid (ACC) in roots, xylem fluid and leaves, and in addition promoted Cl- accumulation. The pattern of change of ABA, ACC and proline followed a two-phase response: an initial transient increase (10-12 days) overlapping with a gradual and continuous accumulation. This biphasic response appears to be compatible with the proposal that the transitory hormonal rises are induced by the osmotic component of salinity, whereas the Cl- increase determines the subsequent accumulations. During the second phase, Cl- levels correlated with abscission in leaves. Production of leaf ethylene was also concomitant with the increase in the abscission rate. Salt-induced abscission was either reduced with CoCl2 (52%) or inhibited with silver thiosulphate (14%). The results suggest that in salt-stressed citrus, leaf abscission is induced by the chloride build-up through a mechanism that stimulates leaf ACC synthesis and further conversion to ethylene. 2017-06-01T10:12:05Z 2017-06-01T10:12:05Z 1998 AUG 1998 article Gomez-Cadenas, A., Tadeo, F.R., Primo-Millo, E., Talón, M. (1998). Involvement of abscisic acid and ethylene in the responses of citrus seedlings to salt shock. Physiologia Plantarum, 103(4), 475-484. 0031-9317 http://hdl.handle.net/20.500.11939/5296 10.1034/j.1399-3054.1998.1030405.x en openAccess Impreso |
| spellingShingle | Gómez-Cadenas, Aurelio Tadeo, Francisco R. Primo-Millo, Eduardo Talón, Manuel Involvement of abscisic acid and ethylene in the responses of citrus seedlings to salt shock |
| title | Involvement of abscisic acid and ethylene in the responses of citrus seedlings to salt shock |
| title_full | Involvement of abscisic acid and ethylene in the responses of citrus seedlings to salt shock |
| title_fullStr | Involvement of abscisic acid and ethylene in the responses of citrus seedlings to salt shock |
| title_full_unstemmed | Involvement of abscisic acid and ethylene in the responses of citrus seedlings to salt shock |
| title_short | Involvement of abscisic acid and ethylene in the responses of citrus seedlings to salt shock |
| title_sort | involvement of abscisic acid and ethylene in the responses of citrus seedlings to salt shock |
| url | http://hdl.handle.net/20.500.11939/5296 |
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