تأثیر محلول پاشی اسیدسالیسیلیک بر برخی شاخص های فیزیولوژیکی چغندرقند در شرایط تنش شوری

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد زراعت، گروه زراعت و اصلاح نباتات، دانشکدة کشاورزی دانشگاه شهید چمران اهواز

2 استادیار گروه زراعت و اصلاح نباتات، دانشکده کشاورزی دانشگاه شهید چمران اهواز

3 دانشیار، گروه زراعت و اصلاح نباتات، دانشکدة کشاورزی دانشگاه شهید چمران اهواز

چکیده

به منظور بررسی تأثیر اسید سالیسیلیک بر برخی شاخص­های فیزیولوژیکی چغندرقند در شرایط تنش شوری برای شناسایی صفات مربوط به تحمل شوری، آزمایشی به صورت اسپلیت فاکتوریل در قالب طرح پایة بلوک­های کامل تصادفی با سه تکرار به صورت گلدانی، در سال زراعی 1392-1391 در مزرعة تحقیقاتی دانشگاه شهید چمران اهواز انجام شد. عامل‌های مورد بررسی شامل اسید سالیسیلیک با غلظت‌های0 (شاهد)، 5/0 و 1 میلی‌مولار به عنوان کرت اصلی، تنش شوری در دو سطح 0 (شاهد) و 150 میلی‌مولار و دو رقم چغندرقند شریف و جلگه بود. محلول­پاشی برگی در مرحلة 4 برگی، همزمان با تنش شوری انجام شد. نتایج نشان داد که تیمار اسید سالیسیلیک افزون بر افزایش معنی­دار سطح برگ، سبزینة (کلروفیل) برگ، هدایت روزنه‌ای، عملکرد کوانتومی نظام نوری (فتوسیستم) دو، بیشینه عملکرد کوانتومی نظام نوری دو، کل قندهای محلول و پرولین، موجب کاهش نفوذپذیری نسبی غشا نسبت به تیمار شاهد در شرایط تنش شوری شد. همچنین تیمار تنش شوری موجب کاهش معنی‌دار هدایت روزنه‌ای، سبزینة برگ، عملکرد کوانتومی نظام نوری دو و بیشینه عملکرد کوانتومی نظام نوری دو شد، درحالی­که نفوذپذیری نسبی غشا، کل قندهای محلول و پرولین به طور معنی­داری افزایش یافت. بنابراین با توجه به نتایج به‌دست‌آمده به نظر می­رسد استفاده از تیمار اسید سالیسیلیک در گیاه چغندرقند در شرایط تنش شوری با تحریک رشد و سوخت‌وساز، موجب تحمل به تنش شوری می­شود.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of foliar application of salicylic acid on some physiological traits of sugar beet in salt stress conditions

نویسندگان [English]

  • Maryam Mohammadi Cheraghabadi 1
  • Habibollah Roshanfekr 2
  • Payman Hasibi 2
  • Mousa Meskarbashi 3
1 M.Sc. Student, Department of Agronomy and Plant Breeding, Shahid Chamran University, Ahvaz, Iran
2 Assistant Professor, Department of Agronomy and Plant Breeding, Shahid Chamran University, Ahvaz, Iran
3 Associate Professor, Department of Agronomy and Plant Breeding, Shahid Chamran University, Ahvaz, Iran
چکیده [English]

To investigate the effect of salicylic acid (SA) on salinity tolerance of two sugar beet cultivars, this experiment was conducted as split factorial based on a randomized complete block design with three replications during growing seasons of 2012 and 2013 in Research Farm of Shahid Chamran University. The studied factors were three levels of SA (0 mM, 0.5 mM and 1 mM), two levels of salinity (150 mm sodium chloride and control) and two sugar beet cultivars (Jolgeh and Shariff). SA was applied as foliar spray along with salinity in the 4-leaf stage. Results showed that foliar application of SA caused significant increase of leaf area (LA), chlorophyll, stomatal conductance, ФPSІІ, Fv/Fm, proline and total soluble sugars, and decrease membrane permeability compared to control under salt stress conditions. Salinity caused a significant decrease in LA, Chlorophyll, stomatal conductance, ФPSІІ and Fv/Fm, while increase proline, total soluble sugars and membrane permeability. Therefore, according to the results of this research, it seems, foliar application of salicylic acid could enhance sugarbeet growth and increases resistance to salt stress.

کلیدواژه‌ها [English]

  • membrane permeability
  • proline
  • salinity tolerance
  • Quantum yield
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