Repository logo
 
Publication

Assessing canopy temperature patterns in two grapevine varieties subjected to deficit irrigation: a tool to optimize water management ?

2015Conference object Open access
Simple item page
dc.contributor.authorCosta, Joaquim Miguel
dc.contributor.authorGarcia-Tejero, Ivan
dc.contributor.authorEgipto, Ricardo
dc.contributor.authorTomás, Magdalena
dc.contributor.authorVaz, Margarida
dc.contributor.authorLopes, C.M.
dc.contributor.authorChaves, M.Manuela
dc.date.accessioned2016-10-26T09:09:46Z
dc.date.available2016-10-26T09:09:46Z
dc.date.issued2015
dc.description.abstractA better understanding of grapevine responses to drought and high air temperatures can help to optimize vineyard management to improve water use efficiency, yield and berry quality. Faster and robust field phenotyping tools are needed in modern precision viticulture, in particular in dry and hot regions such as the Mediterranean. Canopy temperature (Tc) is commonly used to monitor water stress in plants/crops and to characterize stomatal physiology in different woody species including Vitis vinifera. Thermography permits remote determination of leaf surface or canopy temperature in the field and also to assess the range and spatial distribution of temperature from different parts of the canopies. Our hypothesis is that grapevine genotypes may show different Tc patterns along the day due to different stomatal behaviour and heat dissipation strategies. We have monitored the diurnal and seasonal course of Tc in two grapevine genotypes, Aragonez (syn. Tempranillo) and Touriga Nacional subjected to deficit irrigation under typical Mediterranean climate conditions. Temperature measurements were complemented by determination of the diurnal course of leaf water potential (ψleaf) and leaf gas exchange. Measurements were done in two seasons (2013 and 2014) at different phenological stages: i) mid-June (green berry stage), ii) mid-July (veraison), iii) early August (early ripening) and iv) before harvest (late ripening). Correlations between Tc and minimal stomatal conductance will be presented for the two genotypes along the day. Results are discussed over the use of thermal imagery to derive information on genotype physiology in response to changing environmental conditions and to mild water stress induced by deficit irrigation. Strategies to optimize the use of thermal imaging in field conditions are also proposedpt_PT
dc.identifier.citationCosta, JM, Garcia-Tejero I, Egipto R, Mir M, Vaz M, Lopes CM, Chaves MM 2015. Assessing canopy temperature patterns in two grapevine varieties subjected to deficit irrigation: a tool to optimize water management? Proceedings 19th International Meeting of Viticulture GiESCO, Pech Rouge – Montpellier, 31 May -5 June 2015, Vol. 1, 130-133.pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.5/12360
dc.language.isoengpt_PT
dc.publisherGiESCOpt_PT
dc.subjectthermal imagingpt_PT
dc.subjectgenotypespt_PT
dc.subjectdiurnal and seasonal water stress responsespt_PT
dc.subjectphenotypingpt_PT
dc.titleAssessing canopy temperature patterns in two grapevine varieties subjected to deficit irrigation: a tool to optimize water management ?pt_PT
dc.title.alternativeSuivi de l'évolution de la température du couvert végétal de deux variétés soumises a une irrigation déficitaire: un outil pour optimiser la géstion de l'eau ?pt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceMontpellierpt_PT
oaire.citation.title19 th International Meeting of Viticulture GiESCO, Peach Rouge-Montpellier, 31 May-5 June, vol.1, p.130-133pt_PT
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
REP-C.Lopes-Costa et al 2015 Proc GiESCO 2015 Vol1.pdf
Size:
800.85 KB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

ISA - Comunicações em Conferências