Fotossíntese e relações hídricas de duas cultivares jovens de seringueira

  • Cavalcante J
  • Conforto E
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Abstract

(Photosynthesis and water relations of two young rubber tree cultivars). This work aimed to compare some aspects of the leaf-gas exchange and water balance of two field grown cultivars (Fx 3864 e RRIM 600) of the rubber tree. Measurements were carried out for two months between the wet and dry seasons of 2001 and 2002. Integrated values of gas exchange showed a decrease in photosynthesis (32% and 22%), transpiration (44% and 38%), and stomatal conductance (29% and 17%) for RRIM 600 and Fx 3864, respectively. Osmotic potential decreased by 41% for RRIM 600, and by 36% for Fx 3864. The results suggest that the performance of Fx 3864 was similar to that of RRIM 600 throughout the year at the juvenile stage studied.

Author-supplied keywords

  • - gas exchange
  • as cultivares foram mantidas
  • comparar aspectos das trocas
  • cultivar rrim 600
  • de duas cultivares jovens
  • de seringueira
  • de são josé do
  • em condições de
  • em larga escala no
  • este trabalho teve como
  • fotossíntese e relações hídricas
  • fx 3864 e da
  • gasosas e das relações
  • hevea brasiliensis
  • hídricas foliares da cultivar
  • já estabelecida
  • objetivo
  • pólo produtor de borracha
  • resumo
  • rio preto
  • sp
  • water and osmotic potentials

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Authors

  • Juliane Ribeiro Cavalcante

  • Elenice De Cássia Conforto

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