Salicylic acid mitigates the effects of mild drought stress on radish (

Abstract

Water deficit is the most critical factor limiting plant growth and production and salicylic acid (SA) has potential for stress mitigation in plants; therefore, we evaluated the effect of SA on radish (Raphanus sativus L.) growth and ecophysiology under water deficit. Plants were sprayed with SA (100 μM) or water (control), and irrigated at 80% (W80), 60% (W60), 40% (W40), and 20% (W20) of field capacity. The SA treatments and drought stress started 7 days after sowing and lasted until the end of the cycle (30 days after sowing). The morphophysiological analyses showed that radish plants had impaired growth at the lower water supply levels, but the treatment with SA reversed these growth restraints under moderate stress, leading to increases in shoot mass at W40 and storage root mass at W60 and W40. SA treatment also reversed the reduction of storage root volume at W60. The tendency of water deficit to increase FO and reduce FV/FM suggests possible damage to the photosystem II of drought-stressed plants. The parameters of gas exchange and photosynthetic pigments showed maintained photosynthetic efficiency, but total photosynthesis decreased due the lower shoot dry mass. Overall, exogenously applied SA reversed the growth restraints at W60 and W40, which revealed that SA was effective in mitigating the effects of moderate water deficit on biomass accumulation and partitioning in radish plants.

Enhancing crop resilience through thiamine: implications for sustainable agriculture in drought-stressed radish

“…Drought stress can have a significant impact on radish (Raphanus sativus L.) varieties. Radishes are a cool-season vegetable that prefers moderate temperatures and consistent moisture in the soil (Henschel et al, 2022). Similar findings were also noticed that prolonged drought conditions, radishes may experience several physiological and developmental changes, affecting their growth, yield, and overall quality (Tuver et al, 2022).…”

“…The edible thickened hypocotyl, commonly referred to as "globular roots", of radish is abundant in essential macro-and micronutrients, flavonoids, polyphenols, terpenes, fats, and glucosinolates, which contribute to its characteristic pungent flavor (Gamba et al, 2021). Like many other crops, radish cultivation is significantly influenced by water scarcity (Stagnari et al, 2018;Henschel et al, 2022). However, radish exhibits remarkable adaptability and flexibility in response to drought conditions by modulating its growth and defense mechanisms.…”

Sustentabilidade em Foco: Abordagens Interdisciplinares em Agropecuária e Meio Ambiente

“…Ainda, os FH podem ser utilizados como atenuadores do estresse salino por sua capacidade de ação através da indução da expressão de genes relacionados nas respostas de defesa, bem como estimular o sistema antioxidante da planta (SOFY et al, 2020). Ainda, os FH atuam na osmorregulação, acumulando compostos que ajudam no aumento da atividade da enzima antioxidante e tolerância do vegetal (SYEED et al, 2021;HENSCHEL et al, 2022). Dessa forma, torna-se importante mais pesquisas que investiguem o papel e ação de diferentes FH aplicados de forma exógena sob o cultivo de flores comestíveis em ambientes impróprios.…”

Salicylic acid reduces harmful effects of salt stress in Tropaeolum majus

“…Salicylic acid (SA) plays an important role in osmoregulation, contributing to the accumulation of proline and glycinebetaine, which aids in enhancing antioxidant enzyme activity and plant tolerance (Henschel et al, 2022). SA attenuates salt stress by inducing the expression of genes involved in defense responses, in addition to stimulating the antioxidant system (Sofy et al, 2020).…”