GUAIACOL PEROXIDASE ACTIVITY IN YOUNG YELLOW PASSION FRUIT PLANTS TREATED WITH STIMULATE®, SALICYLIC ACID, AND NITROPRUSSIDE SODIUM SUBMITTED TO WATER DEFICIT

Marcos Ferreira Almeida; Raul Antonio Araújo do Bonfim; Mateus Pires Barbosa; Milton Carriço Sá; Leonardo Santos de Oliveira; LEANDRO DIAS DA SILVA; Paulo Araquem Ramos Cairo; Sávio Da Paz Brito

Paper Title

Authors

Marcos Ferreira Almeida
Raul Antonio Araújo do Bonfim
Mateus Pires Barbosa
Milton Carriço Sá
Leonardo Santos de Oliveira
LEANDRO DIAS DA SILVA
Paulo Araquem Ramos Cairo
Sávio Da Paz Brito

Modality

Abstract

Subject area

Plant Physiology

Publishing Date

26/09/2022

Country of Publishing

Brasil

Language of Publishing

Inglês

Paper Page

https://www.even3.com.br/anais/cbfv2022_registration/515659-guaiacol-peroxidase-activity-in-young-yellow-passion-fruit-plants-treated-with-stimulate%ae-salicylic-acid-and-ni

ISBN

978-65-5941-830-5

Keywords

Antioxidant enzymes, Passiflora edulis, reactive oxygen species, water stress.

Summary

The increase in the concentration of reactive oxygen species (ROS) is usually observed in plants subjected to water deficit. Free radicals from ROS degrade structural proteins and lipids, leading to cell membrane disintegration. Antioxidant enzymes such as guaiacol peroxidase (GPX) can help to degrade some ROS, thus mitigating oxidative stress. In this study, the objective was to evaluate the potential of exogenous applications of three inputs – Stimulate® (0.5 mL L-1), a biostimulant consisting of auxins, gibberellins and cytokinins; salicylic acid (ASL, 2.5 µM), as a plant growth regulator; and sodium nitroprusside (SNP, 100 µM), a donor of nitric oxide – in the mitigating oxidative stress based on GPX activity, in young yellow passion fruit plants (Passiflora edulis Sims) submitted to water deficit. A greenhouse completely randomized experiment was carried out, with a 4 × 2 factorial arrangement, which corresponds to exogenous applications of the three inputs plus the control (without inputs application), and irrigation regimes based on 90 and 30% of the pot capacity. Comparing with 90% irrigation, it was found that the GPX activity increased under 30% irrigation, but only in plants that received exogenous applications of inputs. The percentage increase in enzyme activity in plants submitted to water deficit was higher with exogenous application of SNP (151%), followed by Stimulate® (118%) and ASL (101%). We concluded that the three inputs, notably the SNP, contribute to mitigating oxidative stress because they promote an increase in GPX activity in young yellow passion fruit plants submitted to water deficit.

Title of the Event: XVIII Brazilian Congress of Plant Physiology and I Ibero-latinoamerican Congress of Plant Biology
City of the Event: Porto Alegre
Title of the Proceedings of the event: Annals of the Brazilian Congress of Plant Physiology and Ibero-latinamerican Congress of Plant Biology
Name of the Publisher: Even3
Means of Dissemination: Meio Digital

How to cite

ALMEIDA, Marcos Ferreira et al.. GUAIACOL PEROXIDASE ACTIVITY IN YOUNG YELLOW PASSION FRUIT PLANTS TREATED WITH STIMULATE®, SALICYLIC ACID, AND NITROPRUSSIDE SODIUM SUBMITTED TO WATER DEFICIT.. In: Annals of the Brazilian Congress of Plant Physiology and Ibero-latinamerican Congress of Plant Biology. Anais...Porto Alegre(RS) CEPUCRS, 2022. Available in: https//www.even3.com.br/anais/cbfv2022_registration/515659-GUAIACOL-PEROXIDASE-ACTIVITY-IN-YOUNG-YELLOW-PASSION-FRUIT-PLANTS-TREATED-WITH-STIMULATE%ae-SALICYLIC-ACID-AND-NI. Access in: 05/12/2025