Relationship between salicylic acid and resistance to mite in strawberry

Abstract

The two-spotted spider mite (TSSM) Tetranychus urticae is a polyphagous pest which infests several wild and cultivated species of plants worldwide. To date, this mite is the most deleterious pest attacking the strawberry plant under a protected environment. Exogenously applied salicylic acid (SA) has been found to induce resistance to biotic and abiotic stresses. Morpho-anatomical changes in strawberry leaflets and TSSM preference tests were investigated in response to SA treatment. Plants grown in a greenhouse were foliar sprayed with different concentrations of SA (0 mg · L−1, 25 mg · L−1, 50 mg · L−1, 75 mg · L−1 and 100 mg · L−1). After the third application, certain parameters including the number of glandular and non-glandular trichomes, thickness of leaflet, abaxial cell wall, adaxial cell wall, palisade and lacunous parenchyma and mesophyll were measured using scanning electronic microscopy (SEM). Two-choice and non-choice assays were employed to verify the TSSM preference. Exogenous treatment with SA promoted morpho-anatomical changes in the following parameters, namely: thickness of the leaflets, mesophyll, lacunous and palisade parenchyma, cell wall (abaxial and adaxial) and the number of glandular and non-glandular trichomes in strawberry leaflets. In general, TSSM preferred less leaflets treated with SA compared with the control in a two-choice assay. A lesser number of TSSM eggs and live females were also recorded in leaflets treated with SA compared with the control plants in no-choice assays. The values of the number of eggs and live females correlated negatively with those obtained for the morpho-anatomical traits induced by exogenous SA.

Adaptability and Stability Analyses of Improved Strawberry Genotypes for Tropical Climate

“…Currently, strawberry cultivation in the southern hemisphere is based on cultivars from international breeding programs, which leads to market dependence and vulnerability [11,30], since the cultivars are not well adapted to the climate, and they do not express their maximum genetic potential. These cultivars have low productivity in tropical and subtropical conditions, due to their lack of adaptability and stability throughout the year, especially during the warmest periods [1].…”

Increasing Growth, Yield and Bioactive Compounds of Strawberry by Bio-Stimulants

“…Salicylic acid is a plant hormone and produced naturally in plants, and is considered a phenolic compound (Hassoon and Abduljabbar, 2020). Salicylic acid enhances plant vigor and fruit quality traits (Mohamed et al,2017, Youssef et al, 2017 and improves the strawberry plant's tolerance for different abiotic stresses such as salinity stress (Roshdy et al, 2021), drought stress (Dakheel et al, 2022), and enhanced strawberry plant resistance for biotic stresses such as gray mold disease (Emam et al, 2023) and spider mite (De Resende et al, 2021).…”

Effect of different growing media on pomological and phytochemical parameters of Fragaria vesca ʻYellow Wonderʼ and Fragaria ×ananassa ʻCamarosaʼ: a comparative study

“…However, they require careful management of nutrient and pH levels, as well as regular irrigation. Different literatures have compared the application of soil and soilless media for strawberry cultivation [ 13 , 14 ]. It is demonstrated that the fruit quality factors including pH, titrable acidity and also taste index (TSS/TA) are different in soil and soilless growing media of strawberries as the strawberries grown in soil had the maximum amount of pH, Ca, Zn, Fe, P, N, total soluble slides and taste index (TSS/TA) [ 15 ].…”