The functional divergence of biomass partitioning, carbon gain and water use in Coffea canephora in response to the water supply: Implications for breeding aimed at improving drought tolerance

dc.creatorSilva, Paulo E. M.
dc.creatorCavatte, Paulo C.
dc.creatorMorais, Leandro E.
dc.creatorMedina, Eduardo F.
dc.creatorDaMatta, Fábio M.
dc.date2018-09-11T17:57:47Z
dc.date2018-09-11T17:57:47Z
dc.date2012-10-04
dc.date.accessioned2023-09-27T21:56:48Z
dc.date.available2023-09-27T21:56:48Z
dc.identifier0098-8472
dc.identifierhttps://doi.org/10.1016/j.envexpbot.2012.09.005
dc.identifierhttp://www.locus.ufv.br/handle/123456789/21752
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8968479
dc.descriptionRobusta coffee (Coffea canephora) is widely cultivated in regions where water availability is the major environmental constraint affecting crop production. The functional divergence associated with biomass partitioning, carbon gain and water use in response to water supply was examined in 10 one-year-old clones of robusta coffee with varying degrees of droughttolerance. The plants were grown outdoors in 24 L pots and either irrigated or subjected to a four-month water deficit. Under conditions of ample irrigation, clones with superior water use ability (i.e., a higher water potential,transpiration rate, apparent hydraulic conductance and biomass partitioning into roots and a lower wood density) displayed enhanced carbon gains. In contrast, under drought conditions, clones that postponed dehydration via more conservative water use rates showed lower relative decreases in stomatal conductance, photosynthetic rates and biomass accumulation. Isotopic signatures (13C) might be useful for identifying clones with improved performance under drought conditions. Our results suggest that combining useful morphological and physiological traits facilitates the successful assessment of coffee clonal performance in response to drought at the seedling stage. This strategy may be valuable when exploring a large number of genotypes in coffee-breeding programs because it reduces the time and resource costs that would otherwise be wasted on potentially undesirable genotypes.
dc.formatpdf
dc.formatapplication/pdf
dc.languageeng
dc.publisherEnvironmental and Experimental
dc.relationVolume 87, Pages 49-57, March 2013
dc.rightsElsevier B.V.
dc.subjectBreeding
dc.subjectCoffee
dc.subjectDrought tolerance
dc.subjectPhotosynthesis
dc.subjectWater deficit
dc.titleThe functional divergence of biomass partitioning, carbon gain and water use in Coffea canephora in response to the water supply: Implications for breeding aimed at improving drought tolerance
dc.typeArtigo


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