بررسی اثر پرایمینگ بر ویژگی های جوانه زنی و رشدی ارقام چغندر قند (Beta Vulgaris L) در شرایط شوری
الموضوعات :
سید غلامرضا صالحی
1
,
حشمت امیدی
2
,
مهدی حسنی
3
,
محمد حسین بیجه کشاورزی
4
1 - دانش آموخته کارشناسی ارشد، گروه زراعت و اصلاح نباتات، دانشکده کشاورزی، دانشگاه شاهد، تهران، ایران
2 - استادیار، گروه زراعت و اصلاح نباتات، دانشکده علوم کشاورزی، دانشگاه شاهد، تهران.
3 - استادیار، دکتری، مؤسسه تحقیقات اصالح و تهیه بذر چغندرقند، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرج، ایران
4 - دانشجوی دکتری، گروه زراعت و اصلاح نباتات، دانشکده کشاورزی، دانشگاه شاهد، تهران، ایران
الکلمات المفتاحية: هیدروپرایمینگ , نیترات پتاسیم , ارقام چغندرفند , سرعت جوانه زنی,
ملخص المقالة :
این مطالعه با هدف بررسی اثر تیمارهای پرایمینگ (شاهد بدون پرایمینگ، هیدروپرایمینگ، پرایمینگ با نیترات پتاسیم 25/0 درصد و پرایمینگ با نیترات پتاسیم 5/0 درصد) بر خصوصیات جوانه زنی ارقام چغندرقند و خصوصیات رشدی در شرایط شوری در پنج سطح (0، 4 ،8 ،12و 16 دسی‌زیمنس بر متر) بر جوانه‌زنی و رشد گیاهچه در چهار تکرار در پتری دیش در شرایط آزمایشگاهی به صورت آزمایش فاکتوریل بر پایه طرح کاملا تصادفی اجرا گردید. نتایج نشان داد که تاثیر پرایمینگ بذر و تنش شوری بر میانگین مدت جوانه زنی، ضریب سرعت جوانه زنی، واریانس جوانه زنی، یکنواختی سبز شدن، طول ریشه چه، طول ساقه، وزن خشک ساقه و ریشه، محتوای آب نسبی، کلروفیل a کلروفیل b و کارتنوئید معنی‌دار بود. نتایج نشان داد که در هر سه ژنوتیپ تعداد بذور جوانه زده با افزایش سطح شوری، کاهش نشان داده و در سطوح شاهد و استفاده از آب در عامل پرایمینگ، این کاهش به نسبت تعدیل شده است. با افزایش غلظت نمک تا سطح 12 دسی زیمنس، محتوای آب نسبی به طور سیگموئیدی افزایش یافته و در دو سطح 12 و 16 دسی زیمنس، روند نسبتا ثابتی نشان داد. در اکثر صفات مورد بررسی، رقم شکوفا نسبت به دیگر ژنوتیپ‌ها، واکنش کمتری نشان داده است.در بررسی روند واکنش ژنوتیپ‌ها به سرعت، واریانس و همگنی جوانه زنی در سطوح پرایم و شوری با افزایش غلظت شوری، کاهش نشان داده است .
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