بررسی تأثیر محلول‌پاشی آهن بر برخی فراسنجه‌های بیوشیمیایی و نورساختی گیاه ریحان مقدس (Ocimum sanctum)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار، دانشکدۀ کشاورزی، دانشگاه شهید چمران اهواز

2 دانشجوی کارشناسی ارشد، دانشکدۀ کشاورزی، دانشگاه شهید چمران اهواز

چکیده

ریحان مقدس (Ocimum sanctum) یکی از مهم­ترین گیاهان دارویی تیرۀ نعناعیان است. به‌منظور بررسی تأثیر محلول­پاشی آهن بر میزان آهن جذب‌شده، سبزینه (کلروفیل) و فراسنجه‌های نورساختی (فتوسنتزی) ریحان مقدس، آزمایشی در سال زراعی 91-1392 در مزرعۀ تحقیقاتی گروه علوم باغبانی، دانشگاه شهید چمران اهواز بر پایۀ طرح بلوک­های کامل تصادفی در شش تیمار و سه تکرار انجام شد. تیمارهای آزمایشی شامل: شاهد (بدون محلول‌پاشی)، محلول‌پاشی با کلات آهن (1 و 5/1 گرم در لیتر) و نانوکلات آهن (5/0، 1 و 5/1 گرم در لیتر) بودند. نتایج نشان داد، کاربرد محلول­پاشی کود آهن بر صفات میزان آهن و سبزینه برگ، نرخ هدایت روزنه‌ای، تعرق، نورساخت خالص و کارایی مصرف نور در سطح احتمال 1 درصد معنی­دار بود. بیشترین میزان آهن جذب‌شده، هدایت روزنه‌ای، نرخ تعرق و کارایی مصرف نور در تیمار محلول­پاشی 1 گرم در لیتر نانوکلات آهن مشاهده شد. همچنین بیشترین میزان سبزینه، کاروتنوئید و نرخ نورساخت خالص در تیمار محلول‌پاشی 5/1 گرم در لیتر نانوکلات آهن به­دست آمد. کمترین میزان صفات یادشده در تیمار شاهد مشاهده شد. ترکیب غالب اسانس گیاه شامل اوژنول، 1،8- ‌سینئول و متیل‌کاویکول بود. بر پایۀ نتایج به‌دست‌آمده، برای بهبود صفات یادشده، محلول‌پاشی 1 گرم در لیتر نانوکلات آهن پیشنهاد می‌شود.

کلیدواژه‌ها


عنوان مقاله [English]

The effect of foliar application of iron on some biochemical and photosynthetic characteristics of Holy basil (Ocimum sanctum)

نویسندگان [English]

  • Mohammad Mahmoodi Sourestani 1
  • Emel Moghadam 2
  • Ahmad Farrokhian Firoozi 1
1 Assistant Professor, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran
2 M.Sc. Student, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran
چکیده [English]

Holy basil (Ocimum sanctum) is one of the important medicinal plant belongs to Lamiaceae family. In order to evaluate the effect of foliar application of iron on iron and chlorophyll contents and photosynthetic parameters of holy basil, an experiment was conducted at research farm of Department of Horticultural Science, Shahid Chamran University of Ahvaz based on randomized complete block design, with six treatments and three replications. The treatments were control, nano iron chelate (0.5, 1 and 1.5 g.l-1) and iron chelate (1 and 1.5 g.l-1) fertilizers. The results showed that the effect of foliar application of iron fertilizers was significant on iron and chlorophyll contents, stomatal conductance, transpiration, net photosynthesis and quantum yield. The highest iron content, stomatal conductance, transpiration and quantum yield were observed in plant sprayed with 1 g.l-1 nano iron chelate. The highest values of chlorophyll, cartenoid and net photosynthesis were obtained in plant sprayed with 1.5 g.l-1 nano iron chelate. The lowest values of mentioned traits were observed in control treatment. Eugenol, 1,8-cineol and methyl chavicol were  the main oil components. Overall, in regard to obtained results, for increasing mentioned traits of holy basil, foliar application of nano iron chelate with 1 g.l-1 is recommended.

کلیدواژه‌ها [English]

  • Chlorophyll
  • Holy basil
  • iron
  • Net photosynthesis
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