نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه محقق اردبیلی

2 دانش آموخته

3 هیات علمی

چکیده

به‌منظورانجام این تحقیق، یک آزمایش گلخانه‌ای به صورت طرح کاملا تصادفی در سه تکرار با استفاده از یک خاک آلوده به آرسنیک انجام شد. تیمار‌های آزمایش شامل مایه‌زنی گیاه پونه با 5 جدایه برتر از نظر برخی صفات محرک رشد گیاهی و مقاوم به آرسنیک و عدم مصرف مایه تلقیح بود. نتایج نشان داد که اثر مایه‌زنی پونه با جدایه‌های برتر بر مقدار پرولین در این گیاه معنی‌داری شد. بیشترین میزان تجمع پرولین (µg g-1FW 23/0) در گیاهان مایه‌زنی شده با جدایه‌ی AHG-6 مشاهده گردید. کاربرد جدایه‌های محرک رشد بر میزان مقادیر کلروفیل a، b، کلروفیل کل، شاخص کلروفیل و کارتنوئیدها تاثیر معنی‌داری داشت و باعث افزایش چشمگیر این شاخص‌ها در گیاهان مایه‌زنی شده در مقایسه با شاهد گردید. مایه‌زنی گیاه پونه با جدایه‌های محرک رشد تاثیر چندانی در غلظت فسفر گیاه در مقایسه با شاهد نداشت و اختلاف معنی‌داری بین آنها مشاهده نشد. کاربرد تمام ریزموجودات محرک رشد باعث افزایش غلظت منیزیم در اندام هوایی گیاه پونه در مقایسه با شاهد شد. این در حال بود که فقط جدایه‌های AHG-5 و AHG-6 مورد مطالعه باعث افزایش معنی‌دار منیزیم ریشه گیاه پونه در مقایسه با شاهد گردیدند. در مورد کلسیم و پتاسیم استفاده از جدایه‌های محرک رشد توانست باعث افزایش غلظت این عناصر در ریشه و اندام هوایی گیاه پونه گردد، اما اختلاف معنی‌داری بین شاهد و برخی از تیمارها وجود نداشت.

کلیدواژه‌ها

عنوان مقاله [English]

Effect of plant growth promoting (PGP) and arsenic-resistant isolates on Physiological characteristics and macronutrients concentration of Mentha peparata L. in a arsenic-polluted soil

چکیده [English]

In order to perform this research, a greenhouse experiment was conducted in a completely randomized design with three replications. Treatments were involved: inoculation of Mentha peparata L. with 5 plant growth promoting (PGP) and arsenic-resistant isolates and control (without use of inoculant). Results revealed that inoculation of Oregano with superior isolates had significant effect on proline concentration. The greatest accumulations of proline (0.23 µg g-1FW) was observed in plants inoculated with AHG-6 isolate. The application of PGP isolates significantly increased chlorophylla, b, total chlorophyll content, chlorophyll index and carotenoids proportions compared with control. The inoculation of Mentha peparata L with PGP isolates has no significant effect on the plant phosphorus concentration. The utilization of all PGP microorganisms notably propagated the shoot magnesium concentration compared with control. Whereas only AHG-5 and AHG-6 significantly increased the root magnesium concentration. Regarding calcium and potassium, the use of PGP isolates augmented their concentration in the root and shoot, although there was no significant between some treatments and control
The utilization of all PGP microorganisms notably propagated the shoot magnesium concentration compared with control. Whereas only AHG-5 and AHG-6 significantly increased the root magnesium concentration. Regarding calcium and potassium, the use of PGP isolates augmented their concentration in the root and shoot, although there was no significant between some treatments and control.

کلیدواژه‌ها [English]

  • Mentha peparata L
  • growth promoting (PGP) and arsenic-resistant isolates
  • Physiological characteristics
  • nutrients
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