Leaf senescence: the chloroplast connection comes of age
Leaf senescence is a developmental process critical for plant fitness, which involves genetically controlled cell death and ordered disassembly of macromolecules for reallocating nutrients to juvenile and reproductive organs. While natural leaf senescence is primarily associated with aging, it can a...
| Autores principales: | , , , |
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| Formato: | article artículo publishedVersion |
| Lenguaje: | Inglés |
| Publicado: |
MDPI
2020
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/2133/18756 http://hdl.handle.net/2133/18756 |
| Aporte de: |
| id |
I15-R121-2133-18756 |
|---|---|
| record_format |
dspace |
| institution |
Universidad Nacional de Rosario |
| institution_str |
I-15 |
| repository_str |
R-121 |
| collection |
Repositorio Hipermedial de la Universidad Nacional de Rosario (UNR) |
| language |
Inglés |
| orig_language_str_mv |
eng |
| topic |
Senescence Reactive oxygen species Chloroplast Phytohormones Photosynthetic electron transport chain |
| spellingShingle |
Senescence Reactive oxygen species Chloroplast Phytohormones Photosynthetic electron transport chain Mayta, Martín L. Hajirezaei, Mohammad-Reza Carrillo, Néstor Lodeyro, Anabella F. Leaf senescence: the chloroplast connection comes of age |
| topic_facet |
Senescence Reactive oxygen species Chloroplast Phytohormones Photosynthetic electron transport chain |
| description |
Leaf senescence is a developmental process critical for plant fitness, which involves genetically controlled cell death and ordered disassembly of macromolecules for reallocating nutrients to juvenile and reproductive organs. While natural leaf senescence is primarily associated with aging, it can also be induced by environmental and nutritional inputs including biotic and abiotic stresses, darkness, phytohormones and oxidants. Reactive oxygen species (ROS) are a common thread in stress-dependent cell death and also increase during leaf senescence. Involvement of chloroplast redox chemistry (including ROS propagation) in modulating cell death is well supported, with photosynthesis playing a crucial role in providing redox-based signals to this process. While chloroplast contribution to senescence received less attention, recent findings indicate that changes in the redox poise of these organelles strongly affect senescence timing and progress. In this review, the involvement of chloroplasts in leaf senescence execution is critically assessed in relation to available evidence and the role played by environmental and developmental cues such as stress and phytohormones. The collected results indicate that chloroplasts could cooperate with other redox sources (e.g., mitochondria) and signaling molecules to initiate the committed steps of leaf senescence for a best use of the recycled nutrients in plant reproduction. |
| format |
article artículo publishedVersion |
| author |
Mayta, Martín L. Hajirezaei, Mohammad-Reza Carrillo, Néstor Lodeyro, Anabella F. |
| author_facet |
Mayta, Martín L. Hajirezaei, Mohammad-Reza Carrillo, Néstor Lodeyro, Anabella F. |
| author_sort |
Mayta, Martín L. |
| title |
Leaf senescence: the chloroplast connection comes of age |
| title_short |
Leaf senescence: the chloroplast connection comes of age |
| title_full |
Leaf senescence: the chloroplast connection comes of age |
| title_fullStr |
Leaf senescence: the chloroplast connection comes of age |
| title_full_unstemmed |
Leaf senescence: the chloroplast connection comes of age |
| title_sort |
leaf senescence: the chloroplast connection comes of age |
| publisher |
MDPI |
| publishDate |
2020 |
| url |
http://hdl.handle.net/2133/18756 http://hdl.handle.net/2133/18756 |
| work_keys_str_mv |
AT maytamartinl leafsenescencethechloroplastconnectioncomesofage AT hajirezaeimohammadreza leafsenescencethechloroplastconnectioncomesofage AT carrillonestor leafsenescencethechloroplastconnectioncomesofage AT lodeyroanabellaf leafsenescencethechloroplastconnectioncomesofage |
| bdutipo_str |
Repositorios |
| _version_ |
1764820410666319877 |