نهمین کنفرانس ملی و اولین کنفرانس بین المللی فیزیولوژی گیاهی

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کد مقاله 1254

عنوان Mitigation of Salinity-Induced Physiological Stress in Quinoa Using Organic and Mineral Amendments

نویسندگان Mania Yousefi - Hossein Shariatmadari - Hamid Reza Eshghizadeh

چکیده Soil salinity is a major abiotic stress limiting plant growth and productivity in arid and semi-arid regions. Quinoa (Chenopodium quinoa Willd.), a halophyte with inherent tolerance to salinity, drought, and heat, serves as an excellent model to study plant responses to salt stress. This study investigated the physiological and growth responses of quinoa (cv. Titicaca) under saline–sodic soil conditions, with or without soil amendments including gypsum, spent mushroom compost (SMC), and a combination of gypsum + SMC. Salinity treatments were applied at three levels (4, 8, and 12 dS·m⁻¹). Key physiological indicators, including chlorophyll content (SPAD), electrolyte leakage, were measured at the flowering stage, while aboveground dry weight was recorded at full maturity. Salinity induced a marked decline in SPAD and biomass, accompanied by increased membrane damage, particularly in the control. Application of SMC and SMC+gypsum significantly mitigated these negative effects, maintaining higher chlorophyll content, stabilizing cell membranes, and enhancing biomass accumulation across all salinity levels. These findings demonstrate that organic soil amendments can effectively buffer quinoa against salt-induced physiological stress by improving water retention, and cellular stability. The study provides detailed insights into plant adaptive mechanisms to salinity and highlights the potential of SMC-based amendments in enhancing halophytic crop resilience under abiotic stress.

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