تاثیر پرایمینگ بذر با اکسین بر جوانه‌زنی، صفات فیزیولوژیکی و کنترل بیماری رایزوکتونیایی پنبه

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجو/ دانشگاه علوم کشاورزی و منابع طبیعی گرگان

2 دانشگاه علوم کشاورزی و منابع طبیعی گرگان

3 استادیار/ دانشگاه علوم کشاورزی و منابع طبیعی گرگان

چکیده

در تحقیق حاضر تاثیر پرایمینگ با غلظت­های مختلف اسیدایندول- 3- استیک (IAA) بر جوانه­زنی بذر و برخی ویژگی­های فیزیولوژیک سه رقم پنبه شامل ساحل، گلستان و ورامین، هم­چنین کنترل بیماری مرگ گیاهچه ناشی از Rhizoctonia solani در دو آزمایش جداگانه مورد مطالعه قرار گرفت. در آزمایش اول، اثر غلظت­های 0، 1/0، 01/0 و 001/0 میکرومولار IAA بر جوانه­زدن بذر در تشتک­های پلاستیکی بررسی گردید. در آزمایش دوم، تاثیر تیمارهای ذکر شده بر کنترل بیماری مرگ گیاهچه بررسی شد. طول ریشه، طول ساقه و وزنِ خشک کل گیاهچه­ها پس از 28 روز اندازه­گیری گردید و محتوای کل فنل عصاره­ی الکلی توسط معرف فولین- سیوکالتو تخمین زده شد. نتایج نشان داد که جوانه­زنی بذر، رشد ریشه، ساقه و وزنِ خشک کل به­طور معنی­داری توسط غلظت­های پایین IAA (01/0 و 001/0 میکرومولار) افزایش داشته است. هم­چنین استعمال غلظت­های 01/0 و 001/0 میکرومولار از IAA میزان شاخص بیماری ناشی از R. solani را به­ترتیب 17% و 38% در رقم ساحل و 1% و 5/33% در رقم­های گلستان و ورامین کاهش داد. این غلظت­ها سبب افزایش محتوای فنل کل گیاهچه شد. اثر پرایمینگ در سه رقم پنبه مورد مطالعه تاثیر معنی­داری بر تغییر برخی از ویژگی­های فیزیولوژیک و شاخص بیماری داشت.  

کلیدواژه‌ها


عنوان مقاله [English]

Effects of seed priming on the germination traits, physiological characteristics and control of cotton Rhizoctonia disease

نویسندگان [English]

  • elahe lotfalinezhad 1
  • Seyed Javad Saneie 2
  • Seyed Esmaiel Razavi 3
2 Gorgan
3 Assistant Professor/ Gorgan University of Agricultural Sciences and Natural Resources, Department of Plant Protection, Gorgan, Iran
چکیده [English]

In order to study the effect of priming on the germination and growth parameters of vetch seedling under the salinity stress, an experiment was carried out in seed Technology Laboratory of Ramin's Natural Resources and Agriculture University, Khuzestan. The experiment was carried with three replications. The salinity treatments were applied in four levels: o (Control), 6,12 and 18 DS/m by levels of priming of different resources including gibberellic acid (25 mg/kg), calcium carbonate (20g/L), salicylic acid (25 mg/kg), polyethylene glycol (15 times), water(PH=8.04, EC=2.41), distillated water and control (without priming). The results showed that the different levels of salinity lead to decrease the seed germination and seedling growth parameters in all primed and non-primed seeds. Moreover, the priming caused to improve the germination in all levels of salinity compared to control group (without priming). Among these, the prime of calcium carbonate had a positive role in reducing the effect of salinity stress on the parameters such as seed germination and seedling growth so that the primed seeds by calcium carbonate had less reduction in above-mentioned parameters than other primed seeds.

کلیدواژه‌ها [English]

  • Calcium carbonate
  • Gibberellic Acid
  • Polyethylene glycol
  • Salicylic acid
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