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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Leaf arginine spraying improves leaf gas exchange under water deficit and root antioxidant responses during the recovery period

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Autor(es):
Silveira, Neidiquele M. [1, 2] ; Ribeiro, V, Rafael ; de Morais, Sabrina F. N. [1] ; de Souza, Sarah C. R. [3] ; da Silva, Simone F. [4] ; Seabra, Amedea B. [5] ; Hancock, John T. [6] ; Machado, Eduardo C. [1]
Número total de Autores: 8
Afiliação do(s) autor(es):
[1] Agron Inst IAC, Ctr R&D Ecophysiol & Biophys, Lab Plant Physiol Coaracy M Franco, Campinas, SP - Brazil
[2] Univ Campinas UNICAMP, Inst Biol, Dept Plant Biol, Lab Crop Physiol LCroP, Campinas, SP - Brazil
[3] Univ Fed Sao Carlos, Dept Bot, Sao Carlos, SP - Brazil
[4] Ribeiro, Rafael, V, Univ Campinas UNICAMP, Inst Biol, Dept Plant Biol, Lab Crop Physiol LCroP, Campinas, SP - Brazil
[5] Fed Univ ABC, Ctr Nat & Human Sci, Santo Andre, SP - Brazil
[6] Univ West England UWE, Ctr Res Biosci, Bristol, Avon - England
Número total de Afiliações: 6
Tipo de documento: Artigo Científico
Fonte: Plant Physiology and Biochemistry; v. 162, p. 315-326, MAY 2021.
Citações Web of Science: 0
Resumo

Arginine (Arg) metabolism is associated with many cellular and developmental processes in plants and proline, nitric oxide (NO) and polyamines (PAs) have a wide range of physiological functions in plants, including increased tolerance to environmental stresses. This study aimed to test the hypothesis that Arg spraying would stimulate the synthesis of proline, NO and PAs, reducing the oxidative damage caused by water deficit (WD) and increasing drought tolerance of sugarcane plants. Sugarcane plants were sprayed with water or Arg 1 mM, and subjected to WD by gradual addition of polyethylene glycol (PEG-8000) to the nutrient solution. As references, sugarcane plants were grown in nutrient solution without PEG-8000 and sprayed or not with Arg. Our data indicate that exogenous Arg supply improved leaf gas exchange during water deficit and enhanced the root antioxidative protection of sugarcane plants during the recovery period. Arg supply prevented the proline accumulation induced by water deficit and then the main pathway for proline synthesis is likely through glutamate instead of arginine. Although Arg is a substrate for NO and PAs production, supplying Arg had only slight effects in both NO and PAs levels. The spraying of amino acids capable of reducing the harmful effects of drought, such as Arg, can be an alternative to improve crop growth under field conditions. (AU)

Processo FAPESP: 18/08194-2 - Óleo essencial contendo nanopartículas metálicas funcionalizadas com óxido nítrico como estratégia para o controle de patógenos vegetais na agricultura
Beneficiário:Amedea Barozzi Seabra
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 15/14817-4 - O papel do porta-enxerto no metabolismo e transporte de carboidratos em espécies de citros sob déficit hídrico
Beneficiário:Simone Ferreira da Silva
Linha de fomento: Bolsas no Brasil - Doutorado