Sensitivity of Cinchona officinalis L. to water stress: morphological and wood anatomical changes

Authors

  • Darwin Alexander Pucha-Cofrep National University of Loja
  • César Emiliano Feijoo National University of Loja
  • Magaly Yaguana Arévalo National University of Loja
  • Víctor Hugo Eras Guamán National University of Loja

Keywords:

lignin, cellulose, morphology, water strees, wood anatomy

Abstract

The adaptation and productivity of tree species is directly related to their ability to resist extreme environmental climatic variations. Therefore, the main goal of this is quantify the sensitivity of Cinchona officinalis L. to water stress. In addition, it seeks to identify the main morphological and wood anatomical. For that purpose, 100 seedlings of Cinchona officinalis L. were subjected to water stress treatments within a greenhouse. A vertical incision in the xylem was made as a reference of the beginning of the treatment. After seven months of the experiment (April to October 2019), the morphological changes of all the seedlings were evaluated (height, diameter, phytosanitary status, number of leaves and mortality), and microscopic cross sections in the stem of three seedlings per treatment were made in the Laboratorio de Anatomía de Maderas Tropicales at the UNL to see the anatomical changes and measure the percentages of lignin and cellulose in the xylem. The results showed that Cinchona officinalis L. had a fast recovery of vascular cambium. Water stress decreased its growth up to 55 % in height, 70 % in diameter, 60 % in number of leaves, its phytosanitary status was affected from the third month and mortality reached 10.4 %. In addition, lignin percentages reached up to 74 % in the xylem as a response to water stress. Therefore, for better development, higher levels of humidity and constant watering are essential for the optimal growth of Cinchona officinalis L.

Author Biographies

César Emiliano Feijoo, National University of Loja

Carrera de Ingeniería Forestal

Magaly Yaguana Arévalo, National University of Loja

Laboratorio de Micropropagación Vegetal. Facultad Agropecuaria y de Recursos Naturales Renovables. 

Víctor Hugo Eras Guamán, National University of Loja

Carrera de Ingeniería Forestal

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2020-12-31 — Updated on 2021-02-24

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Pucha-Cofrep, D. A., Feijoo, C. E., Yaguana Arévalo, M., & Eras Guamán, V. H. (2021). Sensitivity of Cinchona officinalis L. to water stress: morphological and wood anatomical changes. Bosques Latitud Cero, 10(2), 27–43. Retrieved from https://revistas.unl.edu.ec/index.php/bosques/article/view/860 (Original work published December 31, 2020)

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Vol. 10 No. 2 (2020)

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