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dc.contributor.authorRosa, Nídia
dc.contributor.authorÀvila, Glória
dc.contributor.authorCarbó, Joaquim
dc.contributor.authorVerjans, Wim
dc.contributor.authorPais, Isabel Pereira
dc.contributor.authorda Silva, Anabela Bernardes
dc.contributor.authorMartins, Luísa Louro
dc.contributor.authorMourato, Miguel Pedro
dc.contributor.authorCarvalho, Luísa Cristina
dc.contributor.authorScotti-Campos, Paula
dc.contributor.authorBonany, Joan
dc.contributor.authorAsín, Luís
dc.contributor.authorRamalho, José Cochicho
dc.contributor.authorOliveira, Cristina Moniz
dc.contributor.otherProducció Vegetalca
dc.date.accessioned2021-02-18T15:36:10Z
dc.date.available2021-02-18T15:36:10Z
dc.date.issued2020-12-07
dc.identifier.citationRosa, Nídia, Glória Àvila, Joaquim Carbó, Wim Verjans, Isabel Pereira Pais, Anabela Bernardes da Silva, and Luísa Louro Martins et al. 2020. "Metamitron And Shade Effects On Leaf Physiology And Thinning Efficacy Of Malus × Domestica Borkh". Agronomy 10 (12): 1924. doi:10.3390/agronomy10121924.ca
dc.identifier.issn2073-4395ca
dc.identifier.urihttp://hdl.handle.net/20.500.12327/1115
dc.description.abstractThinning strategies, namely shade or photosynthetic inhibitors, rely on the reduction of carbon supply to the fruit below the demand, causing fruit abscission. In order to clarify the subject, seven field trials were carried out in Lleida, Girona, and Sint-Truiden (2017 + 2018), using orchards of ‘Golden’ and ‘Gala’ apple trees. At the stage of 9–14-mm fruit diameter, four treatments were implemented: (A) CTR-control, trees under natural environmental conditions; (B) SN-shaded trees, trees above which shading nets reducing 50% of irradiance were installed 24 h after metamitron application date—without application of metamitron—and removed after five days; (C) MET-trees sprayed with 247.5 ppm of metamitron; (D) MET + SN-trees submitted to the combined exposure to metamitron application and shading nets. Low radiation significantly increased metamitron absorption (36–53% in the three locations in 2018) and reduced its degradation. Net photosynthesis and stomatal conductance were strongly reduced in all treatments, with minimum values 2 days after spraying (DAS) and incomplete recovery 10 DAS in MET + SN. All treatments resulted in leaf sucrose and sorbitol decreases, leading to a negative carbon balance. SN and MET + SN promoted the highest thinning efficacy, increasing fruit weight and size, with MET + SN causing over-thinning in some trials. Leaf antioxidant enzymes showed moderate changes in activity increases under MET or MET + SN, accompanied by a rise of glutathione content and a reduction in ascorbate, however without lipid peroxidation. This work shows that environmental conditions, such as cloudy days, must be carefully considered upon metamitron application, since the low irradiance enhances metamitron efficacy and may cause over-thinningca
dc.format.extent23ca
dc.language.isoengca
dc.publisherMDPIca
dc.relation.ispartofAgronomyca
dc.rightsAttribution 4.0 Internationalca
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.titleMetamitron and Shade Effects on Leaf Physiology and Thinning Efficacy of Malus × domestica Borkhca
dc.typeinfo:eu-repo/semantics/articleca
dc.description.versioninfo:eu-repo/semantics/publishedVersionca
dc.rights.accessLevelinfo:eu-repo/semantics/openAccess
dc.embargo.termscapca
dc.subject.udc632ca
dc.identifier.doihttps://doi.org/10.3390/agronomy10121924ca
dc.contributor.groupFructiculturaca


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Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by/4.0/