نهمین کنفرانس ملی و اولین کنفرانس بین المللی فیزیولوژی گیاهی

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کد مقاله 1297

عنوان Effect of Drought Stress on Seed Germination and Early Seedling Growth of Petunia

نویسندگان Fatemeh Amini

چکیده Drought stress is a major factor limiting seed germination and early seedling growth in plants. This study evaluated the effects of drought stress on germination and early seedling development of Petunia hybrida. Drought stress was simulated using polyethylene glycol (PEG 6000) at concentrations of 0, 5, 10, and 15%. Seeds were germinated in Petri dishes under controlled conditions (25 ± 2°C, 12 h light/12 h dark) and monitored daily for 10 days. Germination percentage, germination rate, root length, and shoot length were measured. Results indicated that increasing PEG concentrations significantly reduced germination percentage and rate, with the highest values in the control (0% PEG, 92%, 8.5 day⁻¹) and the lowest at 15% PEG (31.2%, 2.9 day⁻¹). Early seedling growth was similarly inhibited, with root length more sensitive than shoot length. These findings demonstrate that Petunia seeds are highly sensitive to water deficit during germination and early development, highlighting the importance of adequate water supply and providing insights for improving drought tolerance in ornamental plant cultivation.

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