Selenium enhances chilling stress tolerance in coffee species by modulating nutrient, carbohydrates, and amino acids content

The effects of selenium (Se) on plant metabolism have been reported in several studies triggering plant tolerance to abiotic stresses, yet, the effects of Se on coffee plants under chilling stress are unclear. This study aimed to evaluate the effects of foliar Se application on coffee seedlings subm...

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Published inFrontiers in plant science Vol. 13; p. 1000430
Main Authors de Sousa, Gustavo F., Silva, Maila Adriely, de Morais, Everton G., Van Opbergen, Gustavo Avelar Z., Van Opbergen, Guilherme Gerrit A. Z., de Oliveira, Raphael R., Amaral, Douglas, Brown, Patrick, Chalfun-Junior, Antonio, Guilherme, Luiz Roberto Guimarães
Format Journal Article
LanguageEnglish
Published Frontiers Media S.A 12.09.2022
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Summary:The effects of selenium (Se) on plant metabolism have been reported in several studies triggering plant tolerance to abiotic stresses, yet, the effects of Se on coffee plants under chilling stress are unclear. This study aimed to evaluate the effects of foliar Se application on coffee seedlings submitted to chilling stress and subsequent plant recovery. Two Coffea species, Coffea arabica cv. Arara, and Coffea canephora clone 31, were submitted to foliar application of sodium selenate solution (0.4 mg plant –1 ) or a control foliar solution, then on day 2 plants were submitted to low temperature (10°C day/4°C night) for 2 days. After that, the temperature was restored to optimal (25°C day/20°C night) for 2 days. Leaf samples were collected three times (before, during, and after the chilling stress) to perform analyses. After the chilling stress, visual leaf injury was observed in both species; however, the damage was twofold higher in C. canephora. The lower effect of cold on C. arabica was correlated to the increase in ascorbate peroxidase and higher content of starch, sucrose, and total soluble sugars compared with C. canephora , as well as a reduction in reducing sugars and proline content during the stress and rewarming. Se increased the nitrogen and sulfur content before stress but reduced their content during low temperature. The reduced content of nitrogen and sulfur during stress indicates that they were remobilized to stem and roots. Se supply reduced the damage in C. canephora leaves by 24% compared with the control. However, there was no evidence of the Se effects on antioxidant enzymatic pathways or ROS activity during stress as previously reported in the literature. Se increased the content of catalase during the rewarming. Se foliar supply also increased starch, amino acids, and proline, which may have reduced symptom expression in C. canephora in response to low temperature. In conclusion, Se foliar application can be used as a strategy to improve coffee tolerance under low-temperature changing nutrient remobilization, carbohydrate metabolism, and catalase activity in response to rewarming stress, but C. arabica and C. canephora respond differently to chilling stress and Se supply.
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This article was submitted to Plant Nutrition, a section of the journal Frontiers in Plant Science
Edited by: Gary Bañuelos, United States Department of Agriculture (USDA), United States
Reviewed by: Maria Clemencia Zambrano-Wilson, Tri County Technical College, United States; Tiziana Centofanti, Central European University, Hungary
ISSN:1664-462X
1664-462X
DOI:10.3389/fpls.2022.1000430