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Gas exchange and antioxidant activity in seedlings of C opaifera langsdorffii Desf. under different water conditions

Overview of attention for article published in Anais da Academia Brasileira de Ciências, December 2017
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Title
Gas exchange and antioxidant activity in seedlings of C opaifera langsdorffii Desf. under different water conditions
Published in
Anais da Academia Brasileira de Ciências, December 2017
DOI 10.1590/0001-3765201720170499
Pubmed ID
Authors

DEREK B.C.J. ROSA, SILVANA P.Q. SCALON, THAIS CREMON, FELIPE CECCON, DAIANE M. DRESCH

Abstract

The aim of this study was to evaluate gas exchange, efficiency of the photosynthetic apparatus, and antioxidant activity in Copaifera langsdorffii Desf. The seedlings were cultivated under different conditions of water availability, in order to improve the utilization efficiency of available water resources. The seedlings were cultivated in four different water retention capacities (WRC- 25%, 50%, 75%, and 100%), and evaluated at four different time (T- 30, 60, 90, and 120 days). During the experimental period, seedlings presented the highest values for carboxylation efficiency of Rubisco (A/Ci), intrinsic water use efficiency (IWUE = A/gs), chlorophyll index, and stomatal opening, when grown in the substrate with 75% WRC, but the stomatal index (SI) was less the 25% WRC. The efficiency of photosystem II was not significantly altered by the treatments. Comparison between the extreme treatments in terms of water availability, represented by 25% and 100% WRC, represent stress conditions for the species. Water availability causes a high activity of antioxidant enzymes (superoxide dismutase, peroxidase, and catalase) in the plant.

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Geographical breakdown

Country Count As %
Unknown 6 100%

Demographic breakdown

Readers by professional status Count As %
Researcher 2 33%
Student > Doctoral Student 1 17%
Student > Master 1 17%
Unknown 2 33%
Readers by discipline Count As %
Agricultural and Biological Sciences 3 50%
Business, Management and Accounting 1 17%
Unknown 2 33%