The phenomenon of cavitation in grapevine…
Cavitation is a physiological dysfunction that takes place in the xylem of water stressed plants. It leads to a loss of hydraulic conductance (kL) as the vessels are filled with air. This impacts water supply, water potential (ΨL) and canopy hydration. Stomatal clossure is an effective response u...
Guardado en:
| Publicado en: | Revista de la Facultad de Ciencias Agrarias |
|---|---|
| Autores principales: | , , |
| Materias: | |
| Acceso en línea: | https://bdigital.uncu.edu.ar/fichas.php?idobjeto=11589 |
| todos_str_mv |
11479 78 Ecofisiología y manejo de cultivo eng INTA. Mendoza INTA. Mendoza SARDI |
|---|---|
| autor_str_mv |
Bonada, Marcos Hugalde, Inés Vila, Hernán |
| descriptores_str_mv |
Cavitación en vid Cavitation Conductancia estomática Conductancia hidráulica Grenache Mechanistic model Modelo mecanístico Potencial hídrico foliar Stomatal conductance Syrah Vid Xilema Xilema de las plantas |
| description_str_mv |
Cavitation is a physiological dysfunction that takes place in the xylem of water stressed
plants. It leads to a loss of hydraulic conductance (kL) as the vessels are filled with air. This
impacts water supply, water potential (ΨL) and canopy hydration. Stomatal clossure is an
effective response upon diminishing momentary or seasonal foliar hydraulic contents.
Depending on each type of plant, stomata may close preventing catastrophic cavitations.
This research intended to understand how stomatal control acts upon cavitation
events in two contrasting grapevine varieties, Syrah and Grenache. A mechanistic was
developed model based on the water and vapour fluxes, kL, stomata conductance (gs),
and the vulnerability to cavitation of the xylematic tissue. The theoretical model explains
how plants respond to drought and avoid catastrophic cavitation. Water stressed grapevines
couple their gs with their kL in order to avoid embolism. It is not stomatal closure,
by istself, the controlling mechanism. Grapevines under mild water stress, do not need
to completely close their stomata in order to avoid cavitation, therefore, photosynthesis
is not completely impeded, and the cost in terms of carbon assimilation is less than
expected for other species. La cavitación es una disfunción fisiológica que ocurre en el xilema de las plantas bajo déficit hídrico, y que entraña una pérdida de su conductancia hidráulica (kL), cuando algunos vasos se llenan de aire. Esto incide negativamente sobre la oferta de agua y afecta el potencial hídrico foliar (ΨL) y la hidratación de la canopia. El cierre estomático es una respuesta efectiva ante la disminución del contenido hídrico. Dependiendo de la especie vegetal, los estomas suelen cerrase para evitar la cavitación catastrófica. Mediante un modelo mecanístico, que se construyó teniendo en cuenta los flujos de agua y vapor, las kL y conductancia estomática (gs), y la vulnerabilidad del xilema a cavitar; se probó que gs no es la única variable responsable de frenar la embolia. Se determinó que gs y kL están íntimamente asociadas y que este acople entre ambas conductancias es lo que frena la embolia. Se concluyó que, en la vid y bajo niveles de estrés hídrico moderado, no es necesario un cierre estomático para controlar la cavitación. Por esto, el mecanismo de control de la cavitación en la vid no conlleva un costo en términos de intercambio gaseoso. |
| disciplina_str_mv |
Ciencias agrarias |
| titulo_str_mv |
El fenómeno de la cavitación en vid… The phenomenon of cavitation in grapevine… |
| object_type_str_mv |
Textual: Revistas |
| id |
11589 |
| plantilla_str |
Artículo de Revista |
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article |
| container_title |
Revista de la Facultad de Ciencias Agrarias |
| journal_title_str |
Revista de la Facultad de Ciencias Agrarias |
| journal_id_str |
r-78 |
| container_issue |
Revista de la Facultad de Ciencias Agrarias |
| container_volume |
Vol. 50, no. 2 |
| journal_issue_str |
Vol. 50, no. 2 |
| tipo_str |
textuales |
| type_str_mv |
Articulos |
| title_full |
The phenomenon of cavitation in grapevine… |
| title_fullStr |
The phenomenon of cavitation in grapevine… The phenomenon of cavitation in grapevine… |
| title_full_unstemmed |
The phenomenon of cavitation in grapevine… The phenomenon of cavitation in grapevine… |
| description |
Cavitation is a physiological dysfunction that takes place in the xylem of water stressed
plants. It leads to a loss of hydraulic conductance (kL) as the vessels are filled with air. This
impacts water supply, water potential (ΨL) and canopy hydration. Stomatal clossure is an
effective response upon diminishing momentary or seasonal foliar hydraulic contents.
Depending on each type of plant, stomata may close preventing catastrophic cavitations.
This research intended to understand how stomatal control acts upon cavitation
events in two contrasting grapevine varieties, Syrah and Grenache. A mechanistic was
developed model based on the water and vapour fluxes, kL, stomata conductance (gs),
and the vulnerability to cavitation of the xylematic tissue. The theoretical model explains
how plants respond to drought and avoid catastrophic cavitation. Water stressed grapevines
couple their gs with their kL in order to avoid embolism. It is not stomatal closure,
by istself, the controlling mechanism. Grapevines under mild water stress, do not need
to completely close their stomata in order to avoid cavitation, therefore, photosynthesis
is not completely impeded, and the cost in terms of carbon assimilation is less than
expected for other species. |
| dependencia_str_mv |
Facultad de Ciencias Agrarias |
| title |
The phenomenon of cavitation in grapevine… |
| spellingShingle |
The phenomenon of cavitation in grapevine… Cavitación en vid Cavitation Conductancia estomática Conductancia hidráulica Grenache Mechanistic model Modelo mecanístico Potencial hídrico foliar Stomatal conductance Syrah Vid Xilema Xilema de las plantas Bonada, Marcos Hugalde, Inés Vila, Hernán |
| topic |
Cavitación en vid Cavitation Conductancia estomática Conductancia hidráulica Grenache Mechanistic model Modelo mecanístico Potencial hídrico foliar Stomatal conductance Syrah Vid Xilema Xilema de las plantas |
| topic_facet |
Cavitación en vid Cavitation Conductancia estomática Conductancia hidráulica Grenache Mechanistic model Modelo mecanístico Potencial hídrico foliar Stomatal conductance Syrah Vid Xilema Xilema de las plantas |
| author |
Bonada, Marcos Hugalde, Inés Vila, Hernán |
| author_facet |
Bonada, Marcos Hugalde, Inés Vila, Hernán |
| title_sort |
The phenomenon of cavitation in grapevine… |
| title_short |
The phenomenon of cavitation in grapevine… |
| url |
https://bdigital.uncu.edu.ar/fichas.php?idobjeto=11589 |
| estado_str |
3 |
| building |
Biblioteca Digital |
| filtrotop_str |
Biblioteca Digital |
| collection |
Artículo de Revista |
| institution |
Sistema Integrado de Documentación |
| indexed_str |
2023-04-25 00:36 |
| _version_ |
1764120183718281216 |
