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@Article{CamargosAntunesRźMeOmJaPo:2016:SpTuTr,
               author = "Camargos Antunes, Werner and R{\^e}go Mendes, Keila and Melo 
                         Chaves, Agnaldo Rodrigues de and Ometto, Jean Pierre Henry Balbaud 
                         and Jarma-Orozco, Alfredo and Pompelli, Marcelo Francisco",
          affiliation = "{Universidade Estadual de Maring{\'a} (UEM)} and {Universidade 
                         Federal de Pernambuco (UFPE)} and {Empresa Brasileira de Pesquisa 
                         Agropecu{\'a}ria (EMBRAPA)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {University of C{\'o}rdoba} and 
                         {Universidade Federal de Pernambuco (UFPE)}",
                title = "Spondias tuberosa trees grown in tropical, wet environments are 
                         more susceptible to drought than those grown in arid 
                         environments",
              journal = "Revista Colombiana de Ciencias Horticolas",
                 year = "2016",
               volume = "10",
               number = "1",
                pages = "9--27",
                month = "ene.-jun.",
             keywords = "Caatinga, composici{\'o}n isot{\'o}pica del carbono, cambio 
                         clim{\'a}tico, limitaciones no estom{\'a}ticas, umbuzeiro, 
                         estr{\'e}s h{\'{\i}}drico.",
             abstract = "In this study, we investigated the different responses of Spondias 
                         tuberosa (umbu) trees, which grow in two different ecological life 
                         zones in northeast Brazil: tropical wet and tropical arid 
                         ecosystems. We evaluated the responses of plants grown under humid 
                         and dry conditions by measuring the photosynthesis, water status, 
                         fluorescence parameters, carbon isotopes and antioxidant system 
                         activity. The higher net photosynthesis values were recorded 
                         contemporaneously with the lower VPD values. The highest 
                         internal-to-ambient CO2 concentration and the absence of typical 
                         changes in the fluorescence parameters suggested an onset of a 
                         nonstomatal limitation in the photosynthesis. Our results showed 
                         that umbu plants can adjust their antioxidant activity during the 
                         dry season as a defensive strategy against the deleterious effects 
                         of water stress. This evidence is supported by the observed 
                         modifications in the pigment concentrations, increased 
                         accumulation of hydrogen peroxide and malondialdehyde, high levels 
                         of electrolyte leakage, increased antioxidant activity, and 
                         decreased carbon isotope discrimination in the umbu trees during 
                         the dry season. Supported by multivariate analysis of variance, 
                         significantly effect of interaction between categorical months of 
                         collect and location predicts a strong dry season effect on our 
                         dataset. Taken together, our data show that umbu trees grown in a 
                         wet tropical environment are more susceptible to drought, as 
                         compared with their tropical arid counterparts. RESUMEN: En este 
                         trabajo se investigaron las respuestas de {\'a}rboles de Spondias 
                         tuberosa (umbu), que crecen en dos zonas ecol{\'o}gicas del 
                         nordeste de Brasil: h{\'u}meda tropical y {\'a}rida tropical. Se 
                         evaluaron las respuestas de las plantas con base en 
                         fotos{\'{\i}}ntesis, estado h{\'{\i}}drico, par{\'a}metros de 
                         fluorescencia, isotopos de carbono y actividad del sistema 
                         antioxidante. Los altos valores de las tasas de 
                         fotos{\'{\i}}ntesis fueron correlacionados con bajos valores del 
                         DPV; los altos niveles de concentraci{\'o}n interna de CO2 y la 
                         ausencia de cambios t{\'{\i}}picos en los par{\'a}metros de 
                         fluorescencia, sugieren la aparici{\'o}n de una limitaci{\'o}n 
                         no estom{\'a}tica de la fotos{\'{\i}}ntesis. Los resultados 
                         indicaron que las plantas de umbu pueden ajustar su actividad 
                         antioxidante durante la estaci{\'o}n seca como una estrategia de 
                         defensa ante los efectos perjudiciales de un estr{\'e}s por 
                         sequ{\'{\i}}a. Esta afirmaci{\'o}n est{\'a} soportada por las 
                         modificaciones observadas en la concentraci{\'o}n de pigmentos, 
                         incrementos en la acumulaci{\'o}n de per{\'o}xido de 
                         hidr{\'o}geno y malondialdehido, altos niveles de electrolitos 
                         libres, incremento de la actividad antioxidante y decrecimientos 
                         en la discriminaci{\'o}n isot{\'o}pica del carbono en la 
                         localidad {\'a}rida. El an{\'a}lisis de varianza multivariado 
                         mostr{\'o} efectos significativos para la interacci{\'o}n mes de 
                         colecta y localidad, lo cual fue fuertemente predecible en la 
                         localidad. El an{\'a}lisis integral de los datos demostr{\'o} 
                         que los {\'a}rboles de umbu que crecieron en un ambiente 
                         h{\'u}medo tropical, son m{\'a}s susceptibles a la 
                         sequ{\'{\i}}a, comparados con su contraparte de ambientes 
                         {\'a}ridos tropicales.",
                  doi = "10.17584/rcch.2016v10i1.4456",
                  url = "http://dx.doi.org/10.17584/rcch.2016v10i1.4456",
                 issn = "2011-2173",
                label = "lattes: 1325667605623244 4 
                         CamargosAntunesR{\^e}RoOmJaPo:2016:\&lTuTr",
             language = "pt",
           targetfile = "camargos_spondias.pdf",
        urlaccessdate = "27 nov. 2020"
}


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