بررسی تأثیر پوترسین و کلریدسدیم بر ویژگی‌های ریخت‌شناختی و فیزیولوژیک کنار بومی جنوب ایران (Ziziphus spina-christi L.)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشیار، دانشکده کشاورزی، دانشگاه شیراز

2 دانشجوی سابق کارشناسی ارشد، دانشکده کشاورزی، دانشگاه شیراز

چکیده

در این پژوهش، تأثیر سطوح مختلف شوری و کاربرد پلی­آمین پوترسین در غلظت­های مختلف برای کاهش تأثیر زیانبار کلرید سدیم بر ویژگی­های ریخت‌شناختی (مورفولوژیک) و فیزیولوژیک کنار بومی جنوب ایران بررسی شد. آزمایش فاکتوریل با سه سطح پوترسین 0، 01/0 و 1/0 میلی­مولار و چهار سطح کلرید سدیم 0، 2/3، 4/6، 8/12 گرم نمک در لیتر با چهار تکرار در یک طرح کامل تصادفی اجرا شد. نتایج نشان داد که با افزایش شوری همۀ شاخص­های رشد مانند شمار برگ، طول ساقه و ریشه همچنین وزن تازه و خشک برگ و ریشه کاهش یافت و محلول‌پاشی با پوترسین به‌ویژه در غلظت 1/0 میلی­مولار سبب بهبود وضعیت رشدی گیاه در شرایط شوری شد. شوری سبب افزایش جذب یون سدیم و کلر و کاهش جذب یون پتاسیم شد. کاربرد پوترسین سبب تعدیل جذب سدیم و افزایش جذب پتاسیم شد. شوری همچنین سبب کاهش سبزینه (کلروفیل) و میزان نشاسته و افزایش پرولین و قندهای محلول شد. کاربرد پوترسین سبب کاهش تأثیر زیانبار شوری بر تجزیۀ سبزینه و همچنین سبب افزایش میزان پرولین قند و نشاسته شد.

کلیدواژه‌ها

عنوان مقاله [English]

Effect of putrescine and sodium chloride on morphological and physiological characteristics of wild ‘Konar’ (Ziziphus spina-christi L.)

نویسندگان [English]

  • Akhtar Shekafandeh 1
  • Shoreh Takhti 2
1 Associate Professor, Faculty of Agriculture, University of Shiraz, Iran
2 Former M. Sc. Student, Faculty of Agriculture, University of Shiraz, Iran
چکیده [English]

In this research, effect of different levels of salinity and application of different concentration of putrescine were investigated for decreasing harmful effects of salt on morphological and physiological characteristics of wild ‘Konar’. A factorial experiment was arranged in a Compelet Randomized Design (CRD) with 4 replications. Treatments were 4 levels of 0, 3.2, 6.4 and 12.8 g/l sodium chloride and 3 levels of 0, 0.01 and 0.1 mM putrescine. The results showed that with increasing salinity, all growth indices such as leaf number, stem length leaf and root fresh and dry weight reduced and spraying application of putrescine especially with 0.1 mM concentration ameliorated seedlings growth in salt condition. Salt stress increased Na+ and Cl- uptake and declined K+ uptake.  Foliar Putrescine application reduced and increased Na+ and K+ uptake, respectively. Salinity also reduced the amount of chlorophyll and starch, but the amount of proline and soluble sugars were increased. Applied putrescine reduced the damaging effect of salt on chlorophyll degradation and also increased the amount of proline, sugar and starch.

کلیدواژه‌ها [English]

  • Chlorophyll
  • proline
  • salt stress
  • soluble sugars
  • starch

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  • تاریخ دریافت: 29 دی 1392
  • تاریخ بازنگری: 10 تیر 1394
  • تاریخ پذیرش: 22 تیر 1394

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