بررسی پاسخ برخی خصوصیات فیزیولوژیکی و عملکرد دانه ارقام خرفه (Portulaca oleracea L.) به تنش خشکی و محلول‌پاشی نانو کلات آهن

نوع مقاله: پژوهشی

نویسندگان

1 گروه اصلاح نباتات و بیوتکنولوژی، دانشکده کشاورزی، دانشگاه زابل، زابل، ایران

2 گروه باغبانی و فضای سبز، دانشکده کشاورزی، دانشگاه زابل، زابل، ایران

3 گروه شیمی، دانشکده علوم پایه، دانشگاه زابل، زابل، ایران

چکیده

به­منظور بررسی تأثیر محلول­پاشی نانو کلات آهن و تنش خشکی بر تغییرات فیزیولوژیکی و عملکرد دانه ارقام خرفه، آزمایشی به­صورت اسپلیت پلات فاکتوریل در قالب طرح بلوک­های کامل تصادفی در سه تکرار، در مزرعه تحقیقاتی جهاد کشاورزی و منابع طبیعی شهرستان اهر در سال 1394 اجرا شد. تیمارهای آزمایشی شامل سطوح تنش خشکی (90 (شاهد)، 70 و 50 درصد ظرفیت زراعی)، دو سطح نانو کلات آهن ( صفر (شاهد) و یک لیتر در هکتار) و دو رقم خرفه (تهران و کازرون) بود. نتایج نشان داد محلول­پاشی آهن در شرایط تنش خشکی تأثیر معنی­داری بر برخی صفات داشت، به­طوری که بیشترین مقدار کلروفیل b در شرایط نرمال آبیاری و محلول­پاشی نانو کلات آهن، بیشترین غلظت سدیم از برهم­کنش 50 درصد ظرفیت زراعی و عدم محلول‌پاشی و بیشترین پتاسیم در شرایط خشکی 50 درصد ظرفیت زراعی و محلول­پاشی نانو کلات آهن حاصل گردید. با توجه به معنی­داری اثرات سه­جانبه، بیشترین میزان پرولین، قند محلول و میزان آهن  از رقم کازرون در شرایط خشکی 50 درصد ظرفیت زراعی با محلول­پاشی نانو کلات آهن حاصل گردید. بیشترین میزان کلروفیل a ، کارتنوئیدها و آنتوسیانین­ها از محلول­پاشی نانو کلات آهن بر رقم کازرون در شرایط آبیاری نرمال به­دست آمد. همچنین در شرایط تنش استفاده از نانو کلات آهن نسبت به شاهد موجب افزایش 66/32 درصدی عملکرد دانه گردید و رقم کازرون نسبت به رقم تهران برتری داشت به طوری که عملکرد دانه رقم کازرون 31/1 برابر رقم تهران بود.

کلیدواژه‌ها


عنوان مقاله [English]

The study of the response of some physiological characteristics and grain yield of Purslane (Portulaca Oleracea L.) cultivars to drought stress and foliar application of chelated nano iron

نویسندگان [English]

  • nafiseh mahdi nezhad 1
  • hamideh jamalpour 2
  • barat ali fakheri 1
  • hameideh azad 3
1 Department of Plant Breeding and Biotechnology, Collage of Agriculture, University of Zabol, Zabol, Iran
2 Department of Horticulture and Landscape, Collage of Agriculture, University of Zabol, Zabol, Iran
3 Department of Chemistry, Collage of Science, University of Zabol, Zabol, Iran
چکیده [English]

In order to study the effect of foliar application of chelated nano iron and drought stress on physiological changes and grain yield of purslane cultivars, an experiment was conducted as split plot factorial randomized complete block design with three replications in Ahar Agricultural Research and Natural Resources Station during 2015. The experimental factors included drought stress levels, 90 (control), 70, and 50 field capacity, two levels of chelated nano iron, 0 (control) and 1 lit.hr, and two cultivars (Tehran and Kazeron). Results showed that foliar application of nano iron under drought stress had a significant effect on some traits, so that the highest content of chlorophyll b (4.47 mg/g leaf tissue) was recorded under normal irrigation and foliar application of nano iron chelated, the highest sodium concentration (38.87%) was obtained from 50% filed capacity and non foliar application of chelated nano iron, and the highest potassium content (87.68%) was obtained under drought stress conditions of 50% filed capacity and foliar application of chelated nano iron. Considering the significance of interaction effects, the highest amount of proline (1.22 mg/g fresh weight), soluble sugar (96.92 mg/g fresh weight), and iron (1.11%) was obtained from Kazeron cultivar under drought conditions, 50% filed capacity by non foliar application of chelated nano iron. The highest amounts of chlorophyll a (6.99 mg/g of leaf tissue), carotenoids (1.67 mg/100 ml), and anthocyanins (0.017 mg/100 ml) were recorded by foliar application of chelated nano iron in Kazeron cultivar under normal irrigation. Also under stress conditions, the use of chelated nano iron compared to control increased the grain yield by 32.66% and Kazeron cultivar was superior to Tehran cultivar, so that the seed grain yield of Kazeron was 1.31 more than that of Tehran.
 

کلیدواژه‌ها [English]

  • Drought stress
  • food elements
  • Grain yield
  • leaf nutrition
  • nano iron
  • photosynthetic pigment
  • purslane
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