Impact of Zinc Stress on Biochemical and Biophysical Parameters in Coffea Arabica Seedlings
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J. Crop Sci. Biotech. 2019 (September) 22 (3) : 253 ~ 264 DOI No. 10.1007/s12892-019-0097-0 RESEARCH ARTICLE
Impact of Zinc Stress on Biochemical and Biophysical Parameters in Coffea Arabica Seedlings Jacqueline Oliveira dos Santos1*, Cinthia Aparecida Andrade1, Kamila Rezende Dázio de Souza1, Meline de Oliveira Santos2, Isabel Rodrigues Brandão1, Jose Donizeti Alves1, Iasminy Silva Santos1 1
Setor de Fisiologia Vegetal, Departamento de Biologia, Universidade Federal de Lavras, Lavras, Minas Gerais, Brasil Empresa de Pesquisa Agropecuária de Minas Gerais/ EPAMIG SUL, Campus UFLA, Lavras, Minas Gerais, Brasil
2
Received: March 24, 2019 / Revised: April 30, 2019 / Accepted: May 08, 2019 Ⓒ Korean Society of Crop Science and Springer 2019
Abstract Zinc is an essential micronutrient for the healthy development of plants, since its insufficient and supraoptimal doses can disrupt the metabolism and biomass production. We aimed to investigate the physiological responses of coffee seedlings to Zn deficiency and excess. Six-month-old seedlings were transferred to plastic pots containing a nutrient solution. The treatments were control (0.03 ppm), zinc deficiency (0.00 ppm), and zinc excess (0.12 ppm). The evaluations were performed in leaves and roots at the beginning of the treatments and after 30 and 60 d of treatments. Zn deficiency and excess increased the production of hydrogen peroxide, antioxidant enzymes activity, ascorbate, and lipid peroxidation contents. The imbalance in zinc nutrition reduced total chlorophyll content and increased carotenoids content throughout the experimental period. Lower biomass and proline accumulation were observed only for deficient seedlings at the end of the experiment. The characteristics analyzed showed that zinc deficiency caused greater damage to the Coffea arabica plants of (Catuaí cultivar) than zinc excess. Key words : Plant nutrition, coffee, antioxidant metabolism, proline, plant growth
Introduction In Brazil, the predominant coffee farm species is Coffea arabica, due to its broad acceptance in the world markets, and Catuaí is the most widely cropped variety covering 65% of the cultivated area (Fernandes et al. 2012), with high grain yield and plant vigor as well as excellent drink quality (Malta et al. 2008). The importance of studies that assess the tolerance of coffee cultivars under conditions of low availability or excess in the soil, addressing the physiological characteristics is well known (Pedrosa et al. 2014; Zabini et al. 2007). The elucidation of differences in nutritional requirements of cultivars, allows cultivation areas to be increased, allocating less demanding zinc progenies on soils that are poorer in Zn or vice versa, maintaining the productive potential and reducing expenses with agricultural inputs and fertilizers (Pedrosa et al. 2014). The need for an adequate zinc supply for growth and grain Jacqueline Oliveira dos Santos () Email: [email protected]
The Korean Society of Crop Science
production of coffee is widely known, especially for pl
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