Effect of salicylic acid on pre-transplant acclimatization of native tomato populations

Abstract

The aim of this study was to evaluate the effect of salicylic acid (SA) application on pre-transplant acclimatization of native populations of tomato. SA is a growth regulator that modifies plant growth and development by inducing changes in cell processes, physiology and morphology. Five populations of native tomato were sown in polystyrene trays. Peat moss was used as substrate and plants were maintained at field capacity continuously. After emergence, seedlings were applied during three weeks with different concentration of SA (0.0, 0.01, 0.1, 0.5 and 1.0 μM). A completely random experimental design was used with five replications per treatment. The growth parameters evaluated were height, stem diameter, number of leaves, hypocotyl length, shoot fresh and dry weight (leaves and stem), and root length and fresh and dry weight. An analysis of variance was carried out, and means were compared with the Tukey test (5%) using SAS statistical software. The recorded data show that pre-transplant seedlings of each of the evaluated populations responded significantly (P=0.01) to the SA treatments. Also, the comparison of means of each of the factors under study showed positive changes. With the concentrations of 0.5 and 0.1 μM SA, higher values of the studied variables were obtained than with the concentrations 0.01 and 1.0 μM SA. The native tomato populations sprayed with SA at concentrations of 0.5 and 0.1 μM responded positively in terms of seedling growth and development. Based on these findings, SA treatments can help acclimatize and present better growth conditions to the seedlings before being transplanted.

Ácido Salicílico E Seu Papel No Desenvolvimento Vegetal: Uma Revisão Narrativa

“…Diante da aclimatação de tomateiros, Poot-Poot et al (2018) observaram em seus estudos, que as dosagens adequadas de AS nos pés de tomates proporcionaram o desenvolvimento das raízes, concluindo que o AS pode ter capacidade de gerar maior estabilidade para uma planta diante de um transplante ou mudança de ambiente. Ainda em estudos realizados por Khorassani et al (2011) analisando raízes de beterraba (Beta L.) geradas em solo com baixa concentração de fósforo (P), observaram o acúmulo de ácido salicílico nas raízes.…”

Exogenous salicylic acid alleviates water stress in watermelon plants

“…Its role as a phytohormone of a phenolic nature allows it to act in several physiological processes of plants, including germination, photosynthesis, respiration, growth and senescence (Guo et al, 2019). In addition to stimulating plant growth in non‐stressful conditions (Poot‐Poot et al, 2018), SA mitigates the negative effects of stress caused by water deficit (Damalas, 2019), salinity (Boukari et al, 2019), heavy metals (Li et al, 2019) and high temperatures (Shah Jahan et al, 2019).…”