Understanding the regulation of leaf and plant gas Exchange under water stress with a process-based model of stomatal conductance

dc.contributor
Universitat de les Illes Balears. Departament de Biologia
dc.contributor.author
Martorell Lliteras, Sebastià
dc.date.accessioned
2015-04-13T10:21:31Z
dc.date.available
2015-04-13T10:21:31Z
dc.date.issued
2014-12-11
dc.identifier.uri
http://hdl.handle.net/10803/288210
dc.description.abstract
Water availability is one of the biggest constraints limiting the plant growth and species distribution around the world. This is the case in the Mediterranean region where, moreover, the frequency and amount of rainfall will decrease due to global warming. This will provoke longer periods of drought and a general decrease of water availability. In this context, one of the most vulnerable crops is grapevine. This crop has been traditionally rain-feed, although in recent years it’s becoming an irrigated crop. This increases the demand to regulate the water use by more precise irrigation techniques based on the plant water status. A good physiological indicator that allows knowing the plant water status is stomatal conductance. Although it is widely known the importance of the stoma, there is not an accurate model to predict their behavior as many physiological and environmental parameters co-regulate it. The aims of this thesis are to: a) study the physiological mechanisms regulating stomatal conductance, b) apply a process-based model to predict the behavior of stomatal conductance c) use this model as tool to better understand the physiological stomatal regulation along the canopy. Results show that stoma has a strong regulation by hydraulic conductance being a key physiological parameter regulating water use. In addition, abscisic acid and osmotic adjustment are also playing an important role in their regulation. On the other hand, the mechanistic model of stomatal conductance has been validated predicting with a good accuracy the variations throughout the day and season in well water and water stress conditions. At time, because this model is based on physiological parameters permits to infer about the relevance of those physiological parameters under water stress, predicting that hydraulic conductance has a main role on the regulation of stomatal conductance in different parts of the canopy.
eng
dc.format.extent
234 p.
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Universitat de les Illes Balears
dc.rights.license
ADVERTIMENT. L'accés als continguts d'aquesta tesi doctoral i la seva utilització ha de respectar els drets de la persona autora. Pot ser utilitzada per a consulta o estudi personal, així com en activitats o materials d'investigació i docència en els termes establerts a l'art. 32 del Text Refós de la Llei de Propietat Intel·lectual (RDL 1/1996). Per altres utilitzacions es requereix l'autorització prèvia i expressa de la persona autora. En qualsevol cas, en la utilització dels seus continguts caldrà indicar de forma clara el nom i cognoms de la persona autora i el títol de la tesi doctoral. No s'autoritza la seva reproducció o altres formes d'explotació efectuades amb finalitats de lucre ni la seva comunicació pública des d'un lloc aliè al servei TDX. Tampoc s'autoritza la presentació del seu contingut en una finestra o marc aliè a TDX (framing). Aquesta reserva de drets afecta tant als continguts de la tesi com als seus resums i índexs.
dc.source
TDX (Tesis Doctorals en Xarxa)
dc.subject
dc.subject.other
Fisiologia Vegetal
dc.title
Understanding the regulation of leaf and plant gas Exchange under water stress with a process-based model of stomatal conductance
dc.type
info:eu-repo/semantics/doctoralThesis
dc.type
info:eu-repo/semantics/publishedVersion
dc.subject.udc
57
cat
dc.subject.udc
574
cat
dc.contributor.authoremail
sebastia.martorell@uib.es
dc.contributor.director
Medrano Gil, Hipólito
dc.contributor.director
Díaz Espejo, Antonio
dc.embargo.terms
cap
dc.rights.accessLevel
info:eu-repo/semantics/openAccess


Documents

tsml1de1.pdf

2.524Mb PDF

Aquest element apareix en la col·lecció o col·leccions següent(s)