Classification of Eucalyptus urograndis hybrids under different water availability based on biometric traits

Claudia D. Silva, Janiele S. Nascimento, Edimar A. Scarpinati, Rinaldo C. Paula

Abstract


Aim of study: The eucalyptus grows rapidly and is well suitable to edaphic and bioclimatic conditions in several regions of of the world. The aim of this study was to assess the performance of Eucalyptus urograndis hybrids grown under different water availability conditions.

Area of study: The study was performed in south-eastern of Brazil

Material and Methods: We evaluated five commercial hybrids cultivated in pots with the substrate maintained at 65, 50, 35 and 20% maximum water retention capacity. The evaluation was based on the following characteristics: total height (cm), diameter (mm), number of leaves, leaf area (dm2), and dry weight (g plant-1) of leaf, stem + branches,   root, shoot and total and root/shoot ratio.

Main results: All the characteristics evaluated were adversely affected by reduced availability of water in the substrate. The hybrids assessed performed differently in terms of biometric characteristics, irrespective of water availability. Water deficit resulted in a greater reduction in the dry weight production compared to number of leaves, diameter and height. Hybrids H2 and H5 have favorable traits for tolerating drought. The hybrid H2 shows a stronger slowdown in growth as soil moisture levels drop, although its growth rate is low, and H5 increases the root/shoot ratio but maintains growth in terms of height, even under drought conditions.

Research highlights: The results obtained in our experiment show that productive hybrids sensitive to drought could also perform better under water deficit conditions, maintaining satisfactory growth despite significant drops in these characteristics.

Keywords: Eucalyptus urograndis; water deficit; drought tolerance. 


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References


Anjum SA, Xie X, Wang L, Saleem MF, Man C, Lei W. 2011. Morphological, physiological and biochemical responses of plants to drought stress. Afr J Agr Res 6, 2026-2032.

Blum A. 2011. Drought resistance – is it really a complex trait? Funct Plant Biol 38, 753-757. http://dx.doi.org/10.1071/FP11101

Cavatte PC, Martins SCV, Morais LE, Silva PEM, Souza LT, Damatta FM. 2012. The Physiology of Abiotic Stresses. In: Plant Breeding for Abiotic Stress Tolerance (Fritsche-Neto R, Borém A, eds). Springer-Verlag, Berlin, Heidelberg, Germany. pp. 21-51. http://dx.doi.org/10.1007/978-3-642-30553-5_3

Chaves MM, Davies B. 2010. Drought effects and water use efficiency: improving crop production in dry environments. Funct Plant Biol 37, piii-vi.

Chaves MM, Maroco JP, Pereira JS. 2003. Understanding plant responses to drought – from genes to the whole plant. Funct Plant Biol 30, 239-264. http://dx.doi.org/10.1071/FP02076

Chaves MM, Oliveira MM. 2004. Mechanisms underlying plant resilience to water deficits: prospects for water-saving agriculture. J Exp Bot 55, 2365-2384. http://dx.doi.org/10.1093/jxb/erh269

Chaves MM, Flexas J, Pinheiro C. 2009. Photosynthesis under drought and salt stress: regulation mechanisms from whole plant to cell. Ann Bot-London 103, 551-560. http://dx.doi.org/10.1093/aob/mcn125

Coopman RE, Jara JC, Bravo LA, Sáez KL, Mella GR, Escobar R. 2008. Changes in morpho-physiological attributes of Eucalyptus globulus plants in response to different drought hardening treatments. Electron J Biotechn 11, 1-10. http://dx.doi.org/10.2225/vol11-issue2-fulltext-9

Costa e Silva F, Shvaleva A, Maroco JP, Almeida MH, Chaves MM, Pereira JS. 2004. Responses to water stress in two Eucalyptus globulus clones differing in drought tolerance. Tree Physiol 24, 1165-1172. http://dx.doi.org/10.1093/treephys/24.10.1165

Fageria ND, Kluthcouski J. 1980. Metodologia para avaliação de cultivares de arroz e feijão para condições adversas de solo. Embrapa-CNPAF, Brasília. 21 pp.

Ferreira DF. 2011. Sisvar: a computer statistical analysis system. Cien Agrotec 35, 1039-1042.

Gindabaa J, Rozanovb A, Negas L. 2005. Photosynthetic gas exchange, growth and biomass allocation of two Eucalyptus and three indigenous tree species of Ethiopia under moisture deficit. Forest Ecol Manag 205, 127-138. http://dx.doi.org/10.1016/j.foreco.2004.10.056

Larcher W. 2000. Ecofisiologia vegetal. Rima, São Carlos, SP, Brazil. 531 pp.

Nascimento HHC, Nogueira RJMC, Silva EC, Silva MA. 2011. Análise do crescimento de mudas de jatobá (Hymenaea courbaril L) em diferentes níveis de água no solo. Rev Arvore 35, 617-626. http://dx.doi.org/10.1590/S0100-67622011000400005

Paula RC, Paula NF, Marino CL. 2012. Breeding Perennial Species for Abiotic Stress. In: Plant Breeding for Abiotic Stress Tolerance (Fritsche-Neto R, Borém A, eds). Springer-Verlag, Berlin, Heidelberg, Germany. pp 157-172. http://dx.doi.org/10.1007/978-3-642-30553-5_10

Pereira MRR, Souza GSF, Rodrigues ACP, Mendonça-Filho AL, Klar AE. 2010. Análise de crescimento em clones de eucalipto submetidos a estresse hídrico. Irriga 15, 98-110.

Pinheiro C, Chaves MM. 2011. Photosynthesis and drought: can we make metabolic connections from available data? J Exp Bot 62, 869-882. http://dx.doi.org/10.1093/jxb/erq340

Taiz L, Zeiger E. 2010. Plant Physiology. Sinauer Assoc, Sunderland, MA, USA. 782 pp.

Tatagiba SD, Pezzopane JEM, Reis EF. 2007. Avaliação do crescimento de clones de Eucalyptus submetidos a diferentes manejos de irrigação. Cerne 13, 1-9.




DOI: 10.5424/fs/2014232-03528

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