Salicylic Acid as an Attenuator of Salt Stress in Soursop

Abstract

The search for alternatives that enable the use of saline waters in agriculture has become constant. In this context, the objective was to evaluate the effects of salicylic acid in mitigating salt stress effects on the growth and gas exchange of soursop cv. ‘Morada Nova’. The study was conducted in a greenhouse, in the municipality of Campina Grande - PB, Brazil. Treatments were distributed in randomized blocks, in a 5 x 4 factorial arrangement, corresponding to five levels of electrical conductivity of irrigation water - ECw (0.8; 1.6; 2.4; 3.2 and 4.0 dS m-1) and four concentrations of salicylic acid - SA (0; 1.2; 2.4 and 3.6 mM), with three replicates. Irrigation with saline water compromised the growth and gas exchange of soursop cv. ‘Morada Nova’. However, exogenous application of salicylic acid induced tolerance to salt stress in soursop plants, as their growth, transpiration, stomatal conductance, photosynthesis and instantaneous carboxylation efficiency were favored by the application of salicylic acid, even when exposed to water salinity.

Exogenous application of salicylic acid on the mitigation of salt stress in Capsicum annuum L.

“…The treatments consisted of four levels of electrical conductivity of irrigation water -ECw (0.8, 1.6, 2.4, and 3.2 dS m -1 ) and four concentrations of salicylic acid -SA (0, 1.2, 2.4, and 3.6 mM) applied via foliar spraying, in a 4 x 4 factorial arrangement, distributed in a completely randomized design, with three replicates, totaling 48 experimental units. Salicylic acid (SA) concentrations were based on a study conducted by SILVA et al (2020b), and water salinity levels were defined based on the study of LIMA et al (2016), according to the tolerance of the crop to salinity and quality of the water available for irrigation in the Brazilian semi-arid region.…”

“…Considering the importance of using saline water for the expansion of irrigated agriculture and guarantee of food production, it is necessary to take action on strategies that minimize the deleterious effects of this abiotic stress, enabling safe agricultural production in the semi-arid region and promoting socioeconomic and environmental development (LIMA et al, 2020). In this context, research has been conducted using salicylic acid to mitigate the effects of salt stress on common bean (ARAÚJO et al, 2018), watermelon (NÓBREGA et al, 2020), basil (SILVA et al, 2019), soursop (SILVA et al, 2020b) and West Indian cherry (DANTAS et al, 2021). However, information on its use in bell pepper crop irrigated with saline waters is still scarce in the literature.…”

Hydrogen peroxide in attenuation of salt stress effects on physiological indicators and growth of soursop

“…The treatments consisted of four levels of electrical conductivity of irrigation water -ECw (0.8, 1.6, 2.4, and 3.2 dS m -1 ) and four concentrations of hydrogen peroxide -H 2 O 2 (0, 10, 20, and 30 μM), in a 4 × 4 factorial arrangement, distributed in a randomized block design, with three replicates. H 2 O 2 concentrations were established according to a study conducted by Veloso et al (2019) and water salinity levels were defined according to Silva et al (2020).…”

Salinização secundária no semiárido e seus impactos no solo, na agricultura e cultivo das plantas – uma revisão

“…Trabalhando com a avaliação dos efeitos do ácido salicílico (1,2; 2,4 e 3,6 mM), na redução do estresse salino da gravioleira cv. Morada Nova, Silva et al (2020b) atribuíram o comprometimento do crescimento e as trocas gasosas da gravioleira a irrigação com água salina de CE (0,8; 1,6; 2,4; 3,2 e 4,0 dS m -1 ). Os autores reportaram ainda que a aplicação de ácido salicílico induziu a tolerância ao estresse salino na gravioleira, uma vez que as plantas apresentaram taxas de crescimento, transpiração, condutância estomática, fotossíntese e eficiência da carboxilação beneficiadas pela aplicação do ácido salicílico, mesmo quando expostas a salinidade da água.…”