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PHOTOSYNTHETIC CHARACTERISTICS AND FIBRE PRODUCTION FOLLOWING DEFOLIATION IN ATTALEA FUNIFERA MART., ARECACEAE, GROWING UNDER FULL SUN AND FOREST UNDERSTOREY

Published online by Cambridge University Press:  01 March 2013

THEDE CAIRES PAMPONET ,
FÁBIO PINTO GOMES ,
ALEX-ALAN FURTADO DE ALMEIDA ,
MARCELO SCHRAMM MIELKE ,
LUANA MAHÉ COSTA GOMES  and
ANDRESA MUNIZ PEDROSA
THEDE CAIRES PAMPONET
Affiliation:
Universidade Estadual de Santa Cruz, Departamento de Ciências Biológicas, Laboratório de Fisiologia Vegetal, Rodovia BR 415, Km 16, Ilhéus, BA 45662-000, Brazil
FÁBIO PINTO GOMES*
Affiliation:
Universidade Estadual de Santa Cruz, Departamento de Ciências Biológicas, Laboratório de Fisiologia Vegetal, Rodovia BR 415, Km 16, Ilhéus, BA 45662-000, Brazil
ALEX-ALAN FURTADO DE ALMEIDA
Affiliation:
Universidade Estadual de Santa Cruz, Departamento de Ciências Biológicas, Laboratório de Fisiologia Vegetal, Rodovia BR 415, Km 16, Ilhéus, BA 45662-000, Brazil
MARCELO SCHRAMM MIELKE
Affiliation:
Universidade Estadual de Santa Cruz, Departamento de Ciências Biológicas, Laboratório de Fisiologia Vegetal, Rodovia BR 415, Km 16, Ilhéus, BA 45662-000, Brazil
LUANA MAHÉ COSTA GOMES
Affiliation:
Universidade Estadual de Santa Cruz, Departamento de Ciências Biológicas, Laboratório de Fisiologia Vegetal, Rodovia BR 415, Km 16, Ilhéus, BA 45662-000, Brazil
ANDRESA MUNIZ PEDROSA
Affiliation:
Universidade Estadual de Santa Cruz, Departamento de Ciências Biológicas, Laboratório de Fisiologia Vegetal, Rodovia BR 415, Km 16, Ilhéus, BA 45662-000, Brazil
*
†Corresponding author. Email: fabiogomesuesc@yahoo.com.br
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Summary

The effects of leaves cut during fibre harvesting of Attalea funifera under contrasting irradiance availability were evaluated, studying defoliation-induced changes in photosynthetic and growth characteristics and fibre production in adult individuals of A. funifera growing under full sun and forest understorey. Fibre harvesting was performed with or without (control plants) leaf removal twice in a 12-month interval. Maximum measured values of net photosynthesis (A), stomatal conductance and transpiration were higher in full sun defoliated palms than in non-defoliated palms in the same environment or in understorey palms of the two treatments. Non-defoliated palms from the two environments emitted more leaves than defoliated palms in the same evaluation period. The increment in the leaf-level rate of carbon assimilation following defoliation did not lead to high production of fibre, suggesting that the photosynthetic compensation for leaf removal was not effective, at least during the period of evaluation. The results indicate that leaf removal during harvesting did not represent an advantage for fibre production and may even lead to decreases in leaf and fibre production.

Type
Research Article
Information
Experimental Agriculture , Volume 49 , Issue 3 , July 2013 , pp. 435 - 447
Copyright
Copyright © Cambridge University Press 2013 

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