Spectral and thermal data as a proxy for leaf protective energy dissipation under kaolin application in grapevine cultivars

Detalhes bibliográficos
Autor(a) principal: Tosin, Renan
Data de Publicação: 2020
Outros Autores: Pôças, Isabel, Cunha, Mário
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.5/20326
Resumo: Research Article
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spelling Spectral and thermal data as a proxy for leaf protective energy dissipation under kaolin application in grapevine cultivarshandheld spectroradiometerleaves reflectanceleaves temperaturethermal cameraxanthophyllResearch ArticleThe dynamic effects of kaolin clay particle film application on the temperature and spectral reflectance of leaves of two autochthonous cultivars (Touriga Nacional (TN, n=32) and Touriga Franca (TF, n=24)) were studied in the Douro wine region. The study was implemented in 2017, in conditions prone to multiple environmental stresses that include excessive light and temperature as well as water shortage. Light reflectance from kaolin-sprayed leaves was higher than the control (leaves without kaolin) on all dates. Kaolin’s protective effect over leaves’ temperatures was low on the 20 days after application and ceased about 60 days after its application. Differences between leaves with and without kaolin were explained by the normalized maximum leaf temperature (T_max_f_N), reflectance at 400 nm, 532 nm, and 737 nm, as assessed through TN data. The wavelengths of 532 nm and 737 nm are associated with plant physiological processes, which support the selection of these variables for assessing kaolin’s effects on leaves. The application of principal component analysis to the TF data, based on these four variables (T_max_f_N and reflectances: 400, 532, 737 nm) selected for TN, explained 83.56% of data variability (considering two principal components), obtaining a clear differentiation between leaves with and without kaolin. The T_max_f_N and the reflectance at 532 nm were the variables with a greater contribution for explaining data variability. The results improve the understanding of the vines’ response to kaolin throughout the grapevine cycle and support decisions about the re-application timingDe GruyterRepositório da Universidade de LisboaTosin, RenanPôças, IsabelCunha, Mário2020-09-16T13:37:31Z20202020-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.5/20326engOpen Agriculture. 2019; 4: 294–304https://doi.org/10.1515/opag-2019-0028info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-03-06T14:49:46ZPortal AgregadorONG
dc.title.none.fl_str_mv Spectral and thermal data as a proxy for leaf protective energy dissipation under kaolin application in grapevine cultivars
title Spectral and thermal data as a proxy for leaf protective energy dissipation under kaolin application in grapevine cultivars
spellingShingle Spectral and thermal data as a proxy for leaf protective energy dissipation under kaolin application in grapevine cultivars
Tosin, Renan
handheld spectroradiometer
leaves reflectance
leaves temperature
thermal camera
xanthophyll
title_short Spectral and thermal data as a proxy for leaf protective energy dissipation under kaolin application in grapevine cultivars
title_full Spectral and thermal data as a proxy for leaf protective energy dissipation under kaolin application in grapevine cultivars
title_fullStr Spectral and thermal data as a proxy for leaf protective energy dissipation under kaolin application in grapevine cultivars
title_full_unstemmed Spectral and thermal data as a proxy for leaf protective energy dissipation under kaolin application in grapevine cultivars
title_sort Spectral and thermal data as a proxy for leaf protective energy dissipation under kaolin application in grapevine cultivars
author Tosin, Renan
author_facet Tosin, Renan
Pôças, Isabel
Cunha, Mário
author_role author
author2 Pôças, Isabel
Cunha, Mário
author2_role author
author
dc.contributor.none.fl_str_mv Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Tosin, Renan
Pôças, Isabel
Cunha, Mário
dc.subject.por.fl_str_mv handheld spectroradiometer
leaves reflectance
leaves temperature
thermal camera
xanthophyll
topic handheld spectroradiometer
leaves reflectance
leaves temperature
thermal camera
xanthophyll
description Research Article
publishDate 2020
dc.date.none.fl_str_mv 2020-09-16T13:37:31Z
2020
2020-01-01T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.5/20326
url http://hdl.handle.net/10400.5/20326
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Open Agriculture. 2019; 4: 294–304
https://doi.org/10.1515/opag-2019-0028
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv De Gruyter
publisher.none.fl_str_mv De Gruyter
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1777302170501120000

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