نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد گروه زیست شناسی، دانشکده علوم، دانشگاه شهید باهنر کرمان

2 دانشیار گروه زیست شناسی، دانشکده علوم، دانشگاه شهید باهنر کرمان

3 دانشیار دانشگاه تحصیلات تکمیلی و فناوری پیشرفته کرمان

4 مربی گروه زیست شناسی، واحد بم، دانشگاه ازاد اسلامی، بم، ایران

چکیده

کمبود آهن یکی از مهم ترین مشکلاتی است که رشد گیاهان را تحت تاثیر قرار می دهد. در این پژوهش اثر دو سویه باکتری محرک رشد تولید کننده سایدروفر (Enterobacter cloacae وBacillus cereus ) بر ویژگی های بیوشیمیایی نهالهای پسته در شرایط فراهمی و کمبود آهن بررسی گردید. در این تحقیق که به صورت فاکتوریل در قالب طرح کامل تصادفی انجام شد، آهن فریک (Fe+3) و آهن فروس (Fe+2) با غلظت20 میکرومولار به نهال های که به مدت یک ماه رشد کرده بودند داده شد. گیاهان فاقد آهن (آهن صفر) به عنوان کنترل در نظر گرفته شدند. نتایج نشان داد آهن فریک در غلظت20 میکرومولار و آهن صفر باعث کاهش رشد گیاه و آسیب به آنها گردید. با به کارگیری باکتری های محرک رشد در گیاهان تیمار یافته با آهن فریک، برخی از پارامترهای رشد مانند وزن تر، رنگیزه های فتوسنتزی، ترکیبات فنلی، قندهای محلول، پراکسیداسیون لیپیدها و پرولین بهبود یافتند. تیمار گیاهان با باکتری های محرک رشد همچنین منجر به افزایش مقدار پروتئین در گیاهان تیمار شده با آهن فریک گردیدند. باکتریهای محرک رشد همچنین منجر به افزایش جذب آهن در اندام های هوایی نهال های تیمار شده با آهن فریک شدند. به نظر میرسد در گیاهان تیمار شده با آهن فریک، باکتری های محرک رشد با تولید سایدروفر منجر به احیا آهن و افزایش آهن در دسترس گیاه و تخفیف تنش کمبود آهن شدند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

A comparative study of inoculation with two growth-promoting and siderophore-producing bacteria (Enterobacter cloacae & Bacillus cereus) on iron availability in pistachio seedlings (Pistacia Vera L.)

نویسندگان [English]

  • Faegheh Bahraminejad 1
  • Fatemeh Nasibi 2
  • Hakimeh Oloumi 3
  • roza arab 4

1 Master's student, Department of Biology, Faculty of Science, Shahid Bahonar University, Kerman

2 Associate Professor, Department of Biology, Faculty of Science, Shahid Bahonar University, Kerman

3 Associate Professor of Kerman University of Postgraduate Education and Advanced Technology

4 Instructor of Biology Department, Bam Branch, Islamic Azad University, Bam, Iran

چکیده [English]

Iron deficiency is one of the most important problems that affects the growth of plants. In this study, the effect of two strains of growth stimulating bacteria producing siderophore (Enterobacter cloacae & Bacillus cereus) on biochemical properties of pistachio seedlings in conditions of availability and deficiency of iron was investigated. In this research, which was done in a factorial design in the form of a completely randomized pattern, ferric iron (Fe + 3) and ferrous iron (Fe + 2) were given to plants that had grown for two months at a concentration of 20 micromolar. Plants without iron (zero iron) were considered as controls. The results showed that ferric iron in concentrations of 20μM and zero iron reduced plant growth and damage to them. By using growth-promoting bacteria in ferric iron-treated plants, some growth parameters such as fresh weight, photosynthetic pigments, phenolic compounds, soluble sugars, lipid peroxidation and proline were improved. Treatment of plants with growth-promoting bacteria also increased the amount of protein in plants treated with ferric iron. Growth-promoting bacteria also increased iron uptake in the shoots of ferric iron-treated seedlings. It seems that in plants treated with ferric iron, growth-promoting bacteria with the production of siderophore led to the reduction of iron and increase the available iron in the plant and reduce iron deficiency stress.

کلیدواژه‌ها [English]

  • Ferric iron
  • Plant growth promoting bacteria
  • Lipid peroxidation
  • iron deficiency
 
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