Leaf Abscission lnduced by Ethylene in Water-Stressed lntact Seedlings of Cleopatra Manda& Requires Previous Abscisic Acid Accumulation in Roots
The involvement of abscisic acid (ABA) in the process of leaf abscission induced by 1 -aminocyclopropane-1 -carboxylic acid (ACC) transported from roots to shoots in Cleopatra mandarin (Citrus reshni Hort. ex Tan.) seedlings grown under water stress was studied using norflurazon (NF). Water stre...
| Main Authors: | , , , |
|---|---|
| Format: | article |
| Language: | Inglés |
| Published: |
ASBP
2020
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11939/6433 http://www.plantphysiol.org/content/112/1/401/tab-article-info |
| _version_ | 1855032426036723712 |
|---|---|
| author | Gómez-Cadenas, Aurelio Tadeo, Francisco R. Talón, Manuel Primo-Millo, Eduardo |
| author_browse | Gómez-Cadenas, Aurelio Primo-Millo, Eduardo Tadeo, Francisco R. Talón, Manuel |
| author_facet | Gómez-Cadenas, Aurelio Tadeo, Francisco R. Talón, Manuel Primo-Millo, Eduardo |
| author_sort | Gómez-Cadenas, Aurelio |
| collection | ReDivia |
| description | The involvement of abscisic acid (ABA) in the process of leaf
abscission induced by 1 -aminocyclopropane-1 -carboxylic acid
(ACC) transported from roots to shoots in Cleopatra mandarin
(Citrus reshni Hort. ex Tan.) seedlings grown under water stress was
studied using norflurazon (NF). Water stress induced both ABA
(24-fold) and ACC (16-fold) accumulation in roots and arrested
xylem flow. Leaf bulk ABA also increased (&fold), although leaf
abscission did not occur. Shortly after rehydration, root ABA and
ACC returned to their prestress levels, whereas sharp and transitory
increases of ACC (1 7-fold) and ethylene (1 O-fold) in leaves and high
percentages of abscission (up to 47%) were observed. NF suppressed
the ABA and ACC accumulation induced by water stress in
roots and the sharp increases of ACC and ethylene observed after
rewatering in leaves. NF also reduced leaf abscission (7-1070).
These results indicate that water stress induces root ABA accumulation
and that this is required for the process of leaf abscission to
occur. It was also shown that exogenous ABA increases ACC levels
in roots but not in leaves. Collectively, the data suggest that ABA,
the primary sensitive signal to water stress, modulates the levels of
ethylene, which is the hormonal activator of leaf abscission. This
assumption implies that root ACC levels are correlated with root
ABA amounts in a dependent way, which eventually links water
status to an adequate, protective response such as leaf abscission |
| format | article |
| id | ReDivia6433 |
| institution | Instituto Valenciano de Investigaciones Agrarias (IVIA) |
| language | Inglés |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | ASBP |
| publisherStr | ASBP |
| record_format | dspace |
| spelling | ReDivia64332025-04-25T14:47:04Z Leaf Abscission lnduced by Ethylene in Water-Stressed lntact Seedlings of Cleopatra Manda& Requires Previous Abscisic Acid Accumulation in Roots Gómez-Cadenas, Aurelio Tadeo, Francisco R. Talón, Manuel Primo-Millo, Eduardo F60 Plant physiology and biochemistry The involvement of abscisic acid (ABA) in the process of leaf abscission induced by 1 -aminocyclopropane-1 -carboxylic acid (ACC) transported from roots to shoots in Cleopatra mandarin (Citrus reshni Hort. ex Tan.) seedlings grown under water stress was studied using norflurazon (NF). Water stress induced both ABA (24-fold) and ACC (16-fold) accumulation in roots and arrested xylem flow. Leaf bulk ABA also increased (&fold), although leaf abscission did not occur. Shortly after rehydration, root ABA and ACC returned to their prestress levels, whereas sharp and transitory increases of ACC (1 7-fold) and ethylene (1 O-fold) in leaves and high percentages of abscission (up to 47%) were observed. NF suppressed the ABA and ACC accumulation induced by water stress in roots and the sharp increases of ACC and ethylene observed after rewatering in leaves. NF also reduced leaf abscission (7-1070). These results indicate that water stress induces root ABA accumulation and that this is required for the process of leaf abscission to occur. It was also shown that exogenous ABA increases ACC levels in roots but not in leaves. Collectively, the data suggest that ABA, the primary sensitive signal to water stress, modulates the levels of ethylene, which is the hormonal activator of leaf abscission. This assumption implies that root ACC levels are correlated with root ABA amounts in a dependent way, which eventually links water status to an adequate, protective response such as leaf abscission 2020-05-08T16:30:41Z 2020-05-08T16:30:41Z 1996 article publishedVersion Gómez-Cadenas, A., Tadeo, F. R., Talon, M., & Primo-Millo, E. (1996). Leaf abscission induced by ethylene in water-stressed intact seedlings of Cleopatra mandarin requires previous abscisic acid accumulation in roots. Plant physiology, 112(1), 401-408. 0032-0889 http://hdl.handle.net/20.500.11939/6433 10.1104/pp.112.1.401 http://www.plantphysiol.org/content/112/1/401/tab-article-info en Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ ASBP electronico |
| spellingShingle | F60 Plant physiology and biochemistry Gómez-Cadenas, Aurelio Tadeo, Francisco R. Talón, Manuel Primo-Millo, Eduardo Leaf Abscission lnduced by Ethylene in Water-Stressed lntact Seedlings of Cleopatra Manda& Requires Previous Abscisic Acid Accumulation in Roots |
| title | Leaf Abscission lnduced by Ethylene in Water-Stressed lntact Seedlings of Cleopatra Manda& Requires Previous Abscisic Acid Accumulation in Roots |
| title_full | Leaf Abscission lnduced by Ethylene in Water-Stressed lntact Seedlings of Cleopatra Manda& Requires Previous Abscisic Acid Accumulation in Roots |
| title_fullStr | Leaf Abscission lnduced by Ethylene in Water-Stressed lntact Seedlings of Cleopatra Manda& Requires Previous Abscisic Acid Accumulation in Roots |
| title_full_unstemmed | Leaf Abscission lnduced by Ethylene in Water-Stressed lntact Seedlings of Cleopatra Manda& Requires Previous Abscisic Acid Accumulation in Roots |
| title_short | Leaf Abscission lnduced by Ethylene in Water-Stressed lntact Seedlings of Cleopatra Manda& Requires Previous Abscisic Acid Accumulation in Roots |
| title_sort | leaf abscission lnduced by ethylene in water stressed lntact seedlings of cleopatra manda requires previous abscisic acid accumulation in roots |
| topic | F60 Plant physiology and biochemistry |
| url | http://hdl.handle.net/20.500.11939/6433 http://www.plantphysiol.org/content/112/1/401/tab-article-info |
| work_keys_str_mv | AT gomezcadenasaurelio leafabscissionlnducedbyethyleneinwaterstressedlntactseedlingsofcleopatramandarequirespreviousabscisicacidaccumulationinroots AT tadeofranciscor leafabscissionlnducedbyethyleneinwaterstressedlntactseedlingsofcleopatramandarequirespreviousabscisicacidaccumulationinroots AT talonmanuel leafabscissionlnducedbyethyleneinwaterstressedlntactseedlingsofcleopatramandarequirespreviousabscisicacidaccumulationinroots AT primomilloeduardo leafabscissionlnducedbyethyleneinwaterstressedlntactseedlingsofcleopatramandarequirespreviousabscisicacidaccumulationinroots |