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اثر نوع بستر کشت و هورمون محرک بر خصوصیات جوانهزنی گونۀ Salvadora persica | ||
نشریه علمی - پژوهشی مرتع و آبخیزداری | ||
دوره 73، شماره 4، اسفند 1399، صفحه 816-831 اصل مقاله (1.33 M) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22059/jrwm.2020.296712.1456 | ||
نویسندگان | ||
مرتضی صابری* 1؛ سهیلا نوری2؛ فهیمه رشیدی3 | ||
1استادیار گروه مرتع و آبخیزداری، دانشکدۀ آب و خاک، دانشگاه زابل، ایران. | ||
2استادیار، گروه مرتع و آبخیزداری، دانشکدۀ آب و خاک، دانشگاه زابل، ایران. | ||
3دانشجوی کارشناسی ارشد مرتعداری، دانشکدۀ آب و خاک، دانشگاه زابل، ایران. | ||
چکیده | ||
جوانهزنی از مهمترین مراحل رشد گیاهان است که ممکن است در محیطهای طبیعی تحت تأثیر تنشهای مختلفی قرار گیرد. این پژوهش با هدف بررسی اثرات نوع بستر کاشت و سطوح مختلف جیبرلیک و ایندول بوتریک اسید بر خصوصیات جوانهزنی بذر گونۀ Salvadora persica در سال ۱۳۹۸، با دو فاکتور بستر کشت در چهار نوع (1- پیت ماس ،2- کوکوپیت، 3- پیت ماس %50+ ماسه %50 و 4- کوکوپیت 50%+ ماسه 50%) و فاکتور دوم شامل جیبرلیک اسید (دو سطح ۲۵۰ و ۵۰۰ پی پی ام) و ایندول بوتریک اسید (دو سطح ۲۵۰ و ۵۰۰ میلی گرم بر لیتر) انجام شد. سپس آزمایش فاکتوریل در قالب طرح پایۀ کاملاً تصادفی اثر دو فاکتور مذکور و آب مقطر به عنوان شاهد در سه تکرار بر جوانهزنی بذر و رشد اولیۀ گیاهچۀ گیاه Salvadora persica بررسی شد. نتایج نشان داد بستر کشت بر درصد جوانهزنی، طول ریشهچه، ساقهچه، گیاهچه، وزن تر ریشهچه، وزن تر ساقهچه و شاخص بنیۀ بذر در سطح آماری یک درصد اثر معنیدار داشت. همچنین پیش تیمار بذور با هورمونهای جیبرلیک و ایندول بوتریک اسید بر کلیۀ صفات مورد بررسی در این آزمایش اثر معنیدار در سطح یک درصد داشت. اثر متقابل نوع بستر و پیش تیمار با هورمونها بر صفات درصد جوانهزنی، طول ریشهچه، ساقهچه، گیاهچه و شاخص بنیۀ بذر اثر معنیدار در سطح یک درصد داشت و بر وزن تر ریشهچه و ساقهچه اثر معنیدار نداشت. بهطوریکه بیشترین درصد جوانهزنی در بستر کشت کوکوپیت و جیبرلیک اسید ۲۵۰ پی پی ام برابر با ۷۳ درصد حاصل شد. همچنین بالاترین طول گیاهچه در اثر کاربرد بستر پیت ماس و جیبرلیک اسید ۲۵۰ پی پی ام برابر با ۶/۲۹سانتی متر بهدست آمد. بهطور کلی با توجه به اهمیت گونۀ Salvadora persica به لحاظ دارویی، صنعتی و حفاظتی پیشنهاد میشود از پیش تیمار بذر با جیبرلیک اسید ۲۵۰ پیپیام و بستر کشت ترکیبی کوکوپیت و ماسه برای تسریع در روند جوانهزنی و تولید نهال این گونه استفاده گردد. | ||
کلیدواژهها | ||
جوانهزنی؛ بستر کشت؛ جیبرلیک اسید؛ ایندول بوتریک اسید؛ Salvadora persica | ||
مراجع | ||
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