Effect of Salicylic Acid Pretreatment on Seedling Growth and Antioxidant Enzyme Activities of Sunflower (Helianthus Annuus L.) and Linseed (Linum Usitatissimum L.) Plants in Salinity Conditions

Abstract

Salinity has become a problem all over the world in agricultural areas. Plants develop a defense mechanism to increase various antioxidant enzyme activities to resist salt stress. In addition, the effects of stress are tried to be reduced with various applications. One of these applications is the application of salicylic acid (SA). However, the effects of SA application vary depending on the plant species and cultivar. In this study, the seeds of sunflower and linseed plants were primed for 4 hours with different concentrations of SA doses 0 (control) (SA1), 0.25 mM (SA2), 0.50 mM (SA3), 1.00 mM (SA4) priming. In the laboratory, the seeds were permitted to develop in petri dishes with different salt 0 (control) (S1), 50 mM (S2), 100 mM (S3), 150m M(S4) concentrations for 14 days. As a result of the study, it was determined that SA had a positive effect on both morphological and chemical properties in both plant species grown under salt stress.

Enhancing rainfed safflower yield, oil content, and fatty acid composition through intercropping with chickpea and stress-modifier biostimulants

“…Similarly, in Brassica napus L., Habibi (2015) reported that Se and SA applications enhanced agronomic traits such as pod number, seed number per pod, and seed productivity, potentially by stabilizing carbon dioxide, which positively influences carbon assimilation and subsequent seed formation. Gürsoy (2022) reported that SA application improved sunflower productivity when intercropped with linseed under water-deficit stress by enhancing photosynthetic capacity, CO 2 assimilation, and the release of growth regulators and phytohormones. Similarly, Akbulut (2020) demonstrated that SA application indirectly improved the agronomic traits and seed yield of Jerusalem artichoke (Helianthus tuberosus L.) intercropped with snap bean (Phaseolus vulgaris L.) under water-deficit conditions.…”

“…In this study, the observed increase in proline concentrations following Se and SA treatments suggests the potential of these stress modulators to enhance safflower's stress tolerance mechanisms. Proline accumulation in intercropping systems in plants treated with Se and SA can be attributed to various factors, such as the regulatory influence of abscisic acid (ABA) on light-mediated mechanisms involved in proline metabolism (El-Tohamy et al, 2018) or the presence of highenergy photosynthetic compounds that enhance proline synthesis (Gürsoy, 2022).…”

“…Studies have demonstrated that intercropping systems are agronomically and economically feasible, especially when species exhibit complementary resource use (Rezaei-Chiyaneh et al, 2021a;Amani Machiani et al, 2019), as they outperform monoculture stands in terms of productivity (Gao et al, 2019;Mohammadzadeh et al, 2022;Namazi et al, 2022). Studies have reported improved vegetative growth and physiological responses of industrial plants intercropped with legumes compared to monocropping conditions (Fotohi Chiyaneh et al, 2022;Gürsoy, 2022). Moreover, intercropping stabilizes yields, suppresses weeds, optimizes land use, and increases nitrogen availability, especially when incorporating legumes (Weerarathne et al, 2017;El-Tohamy et al, 2018), contributing to environmental conservation (Jalilian et al, 2017).…”

“…Salicylic acid, a plant hormone, induces plant defense mechanisms against various biotic and abiotic stresses (Ardebili et al, 2014), positively impacting physiological activities, including tissue water status, stomatal conductance, chlorophyll content, and membrane properties (Damalas and Koutroubas, 2021) and antioxidant enzyme activities (Yousefzadeh Najafabadi and Ehsanzadeh, 2017;Kaur et al, 2022). Gürsoy (2022) reported that SA application improved agronomic traits, growth, and antioxidant enzyme activities in sunflower and linseed. Selenium is a crucial plant microelement, exerting regulatory actions as cofactors for various enzymes and influencing plant growth and development (Inostroza-Blancheteau et al, 2013).…”

Morphological and biochemical changes with hormone and hydro- priming applications in safflower (Carthamus tinctorius L.) seedlings under salinity stress conditions

“…As a result of the study, they reported that the content of carotenoids decreased in plants exposed to salt stress, whereas the pigment contents of plants treated with gibberellic acid and proline were at the same level as control plants. Gürsoy (2022b), in her study in which he applied salicylic acid to sunflower and linseed plants under salt stress, reported that pretreatment applications in both plants caused an increase in carotenoid content compared to the control.…”