تأثیر متانول بر خصوصیات جوانه‌زنی گیاه لوبیا (Phaseolus vulgaris L. cv. Sadry) تحت تنش خشکی

نوع مقاله : مقالات پژوهشی

نویسندگان

لرستان

چکیده

به‌منظور بررسی اثر متانول بر میزان درصد و سرعت جوانه‌زنی، شاخص بنیه بذر، طول ریشه‌چه، ساقه‌چه، گیاهچه، وزن خشک ساقه‌چه، ریشه‌چه و آندوسپرم مصرفی گیاه لوبیا رقم صدری در شرایط تنش خشکی آزمایشی به‌صورت فاکتوریل در قالب طرح کاملاً تصادفی با سه تکرار به‌اجرا درآمد. عامل اول غلظت‌های متانول با 4 سطح (شامل شاهد یا بدون متانول، 5، 10 و 15 درصد حجمی) و عامل دوم خشکی ایجاد شده با پلی‌اتیلن گلایکول 6000 در 4 سطح (0، 3-، 6- و 9- بار) بود. نتایج نشان داد بین سطوح مختلف متانول اختلاف معنی‌داری از نظر درصد و سرعت جوانه‌زنی، طول ریشه‌چه، ساقه‌چه و گیاهچه، وزن خشک ساقه‌چه و ریشه‌چه، شاخص بنیه بذر و آندوسپرم مصرفی وجود داشت (p 0.01). با افزایش غلظت متانول، کاهش معنی‌داری در کلیه صفات مورد بررسی نسبت به سطح شاهد مشاهده شد. تنش خشکی در سطح 9- بار موجب کاهش معنی‌داری (p 0.01) در میزان درصد و سرعت جوانه‌زنی، طول ریشه‌چه، طول گیاهچه، وزن خشک ریشه‌چه و آندوسپرم مصرفی نسبت به دیگر سطوح شد. نتایج نشان داد که در شرایط بدون تنش خشکی، متانول باعث کاهش معنی‌دار در کلیه صفات مورد بررسی شد. در شرایط تنش خشکی، متانول در کلیه سطوح به‌صورت معنی‌داری درصد جوانه‌زنی، طول ریشه‌چه، طول گیاهچه، وزن خشک ریشه‌چه و ساقه‌چه را کاهش داد.

کلیدواژه‌ها


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