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Nitrate/ammonium relationship and Tanzania guinea grass tolerance to stress caused by copper

Grant number: 15/20625-0
Support type:Scholarships in Brazil - Master
Effective date (Start): January 01, 2016
Effective date (End): January 31, 2017
Field of knowledge:Agronomical Sciences - Animal Husbandry - Pastures and Forage Crops
Principal researcher:Francisco Antonio Monteiro
Grantee:João Cardoso de Souza Junior
Home Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil

Abstract

Copper (Cu) toxicity negatively affects nitrogen (N) metabolism, photosynthetic activity and causes oxidative stress in plants, limiting plant growth and remediation of these contaminated areas by plants. Nevertheless, adequate nutrition with proportions of NO¬3-/NH4+ may increase the tolerance of plants to Cu toxicity. Currently, there are no studies that show such effects, especially in Tanzania guinea grass (Panicum maximum), which has shown tolerance to some metals. The objective is to evaluate, in greenhouse conditions, the effect of the proportions of NO¬3-/NH4+ in alleviating stress induced by Cu in guinea grass grown in nutrient solution, through the evaluation of morphogenic, physiological, productive, nutritional and biochemical parameters. With the results it will be possible to better characterize the Cu toxicity in guinea grass and to evaluate the plant tolerance response in relation to the proportions of NO¬3-/NH4+. A better and deeper understanding of the guinea grass tolerance mechanisms to Cu, as well as the role of the mineral nutrition to increase this tolerance, will help in the recommendations of the specific nutritional management for growing these plants in soils contaminated by this metal. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DE SOUZA JUNIOR, JOAO CARDOSO; NOGUEIROL, ROBERTA CORREA; MONTEIRO, FRANCISCO ANTONIO. Nitrate and ammonium proportion plays a key role in copper phytoextraction, improving the antioxidant defense in Tanzania guinea grass. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY, v. 171, p. 823-832, APR 30 2019. Web of Science Citations: 1.
NOGUEIROL, ROBERTA CORREA; MONTEIRO, FRANCISCO ANTONIO; DE SOUZA JUNIOR, JOAO CARDOSO; AZEVEDO, RICARDO ANTUNES. NO3-/NH4(+) proportions affect cadmium bioaccumulation and tolerance of tomato. Environmental Science and Pollution Research, v. 25, n. 14, SI, p. 13916-13928, MAY 2018. Web of Science Citations: 3.
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
JUNIOR, João Cardoso de Souza. Nitrate and ammonium proportions and tanzânia guineagrass tolerance to stress by excess copper. 2017. Master's Dissertation - Universidade de São Paulo (USP). Escola Superior de Agricultura Luiz de Queiroz Piracicaba.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.