اسید جیبرلیک و نقش آن در بازیایی و بهبود شاخص‌های رشدی بذور زوال یافته پنبه رقم ورامین

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی سابق کارشناسی ارشد علوم و تکنولوژی بذر، دانشکده کشاورزی، دانشگاه بیرجند

2 استادیار گروه زراعت و اصلاح نباتات دانشکده کشاورزی، دانشگاه بیرجند

3 دانشیار گروه زراعت و اصلاح نباتات دانشکده کشاورزی، دانشگاه بیرجند

4 استادیار گروه امور زراعی دانشکده کشاورزی و منابع طبیعی دانشگاه گنبد کاووس

5 دانشجوی دکتری زراعت گروه امور زراعی دانشکده کشاورزی و منابع طبیعی دانشگاه گنبد کاووس

چکیده

زوال بذر یکی از عوامل مهم کاهش‌دهنده بنیه و جوانه‌زنی در بذر می‌باشد. جهت بررسی تأثیر هورمون جیبرلیک اسید بر بازیابی و بهبود شاخص‌های رشدی بذور زوال‌یافته پنبه رقم ورامین آزمایشی به صورت کاملاً تصادفی در سه تکرار انجام شد. تیمارهای آزمایش شامل دو سطح زوال (48 و 96 ساعت) به همراه شاهد و دو غلظت 500 و 1000 پی‌پی‌ام اسید جیبرلیک به همراه شاهد و زمان اعمال تیمار هورمون به سه صورت (قبل از زوال، بعد از زوال و قبل و بعد از زوال) بودند. نتایج آزمایش نشان داد که در ترکیب‌های تیماری بدون زوال، در غلظت 500 پی‌پی‌ام، طول ساقه‌چه وریشه‌چه، وزن خشک ریشه‌چه، مقدار استفاده از ذخائر بذر، کارایی استفاده از ذخائر بذر و کسر ذخائر مصرف شده بذر بهترین شرایط را داشتند. در آزمایش اعمال پرایم قبل از زوال در غلظت 500 پی‌پی‌ام صفات سرعت و یکنواختی جوانه‌زنی، D10،D90، طول ساقه‌چه، طول ریشه‌چه، وزن خشک ساقه‌چه، وزن خشک ریشه‌چه، مقدار استفاده از ذخائر بذر، کارایی استفاده از ذخائر و کسر ذخائر مصرف شده بذر بهترین نتایج را داشتند و در غلظت 1000 پی‌پی‌ام، درصد جوانه‌زنی در بالاترین مقدار بود. بطورکلی در ازمایشات انجام شده اسید جیبرلیک با غلظت 500 پی‌پی‌ام بهترین بازیابی و بهبود بذور زوال یافته را نشان داد.

کلیدواژه‌ها

عنوان مقاله [English]

Gibberellic acid and its role in the development and growth indices of Deteriorated Cotton seeds varamin variety

نویسندگان [English]

  • Hasan Ebrahimi 1
  • Soheil Parsa 2
  • Majid Jami-Alahmadi 3
  • Ali Rahemi karizaki 4
  • seyed hossein hosseini 5
1 M.Sc student of Seed Science and Technology, Dept of Agronomy and Plant Breeding, Faculty of Agriculture,University of Birjand
2 Assistant Prof Dept of Agronomy and Plant Breeding, Faculty of Agriculture,University of Birjand
3 Assistant Prof Dept of Agronomy and Plant Breeding, Faculty of Agriculture,University of Birjand
4 Assistant Prof. Dept. of Plant Production Gonbad University, Gonbad, Iran
5 Phd student of Agronomy, Department of plant production, Gonbad University, Gonbad, Iran,
چکیده [English]

Abstract
Deterioration of seeds is one of the important factors in reducing seeds vigor and limit germination. In order to investigate the effect of gibberellic acid hormone on recovery of seeds, and seedling growth in Varamin cotton seed. The experiment was done randomly three times. The experimental sets consisted of two decline levels (48 and 96 hours) with witness and 2 dense levels of gibberellic acid hormone (500 and 1000 PPM) with witness, and the treatment of gibberellic acid hormone was completed in 3 styles (before deterioration, after deterioration and before and after the deterioration. The results showed that the combination of treatments at 500 PPM without deterioration indicated that plumule length, root length, dry root weight, the amount of seed reserves, efficient use of reservoir seed, seed fraction of the resources consumedhad the best treatment. In the prime applying experiment before deterioration, in 500 PPM density with rate and uniformity of germination, D10, D90, plumlule length, root length, dry root weight, dry plumule weight, usage amount of reserves, effective use of resources, consumption and seed fraction, had the bestresult; and at 1000 PPM level the percentage of germination, demonstrated the highest improvement. Finally, in general we can say that gibberellic acid can recover deteriorated seeds.

کلیدواژه‌ها [English]

  • accelerated aging
  • germination
  • seeds vigor

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