Ascorbic acid on the induction of salt stress tolerance in guava in the seedling formation phase

Détails bibliographiques
Publié dans:	Plant physiology and biochemistry : PPB. - 1991. - 220(2025) vom: 15. März, Seite 109506
Auteur principal:	Agostinho da Silva, Julio Cesar (Auteur)
Autres auteurs:	Nóbrega, Jackson Silva, Soares de Lima, Geovani, Almeida Dos Anjos Soares, Lauriane, Andrade Ferreira, Jean Telvio, da Conceição Almeida, Daniel, Silva, Gleisson Dos Santos da, Silva, Josélio Dos Santos da, Nogueira de Lacerda, Cassiano, Soares da Silva, Saulo, Rodrigues da Silva, André Alysson, Gehyi, Hans Raj, Dantas, Maila Vieira
Format:	Article en ligne
Langue:	English
Publié:	2025
Accès à la collection:	Plant physiology and biochemistry : PPB
Sujets:	Journal Article Antioxidant activity Psidium guajava L. Salt stress Ascorbic Acid PQ6CK8PD0R

Description
Résumé:	Copyright © 2025 Elsevier Masson SAS. All rights reserved. Guava is a fruit crop widely exploited in the Northeast region of Brazil. However, its exploitation is limited by water scarcity and, in many cases, producers are forced to use water with high levels of salts in irrigation. Thus, it is necessary to develop techniques to induce plant tolerance to salt stress, and the foliar application of a non-enzymatic compound such as ascorbic acid is a promising alternative to mitigate the deleterious effects on plants. The objective was to evaluate the effects of foliar application of ascorbic acid on guava plants, irrigated with saline waters in the seedling formation phase in a semi-arid region. The experiment was carried out in a greenhouse adopting a randomized block design, in a 5 × 4 factorial scheme, with five levels of electrical conductivity of water - ECw (0.3, 1.3, 2.3, 3.3 and 4.3 dS m-1) and four concentrations of ascorbic acid - AsA (0, 200, 400 and 600 mg L-1) with four replicates. Water salinity from 0.57 dS m-1 compromised the gas exchange and biosynthesis of photosynthetic pigments, besides inhibiting the growth and quality of guava seedlings cv. Paluma. The concentration of 375 mg L-1 AsA increases the production of photosynthetic pigments under low salinity conditions (0.3 dS m-1) and increases the number of leaves and dry matter of seedlings up to 1.55 dS m-1. Foliar application of up to 450 mg L-1 attenuated the deleterious effects of salt stress on gas exchange and growth of guava seedlings. Guava cv. Paluma seedlings present higher quality when produced with an ECw of 0.55 dS m-1 and under a concentration of 75 mg L-1 of AsA at 150 days after sowing
Description:	Date Completed 03.05.2025 Date Revised 03.05.2025 published: Print-Electronic Citation Status MEDLINE
ISSN:	1873-2690
DOI:	10.1016/j.plaphy.2025.109506