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ارزیابی توانایی سویه‌های باکتریایی فرموله‌شده بر مهار پوسیدگی فیتوفترایی طوقه و ریشه پسته

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی سابق کارشناسی ارشد، بخش تحقیقات گیاهپزشکی، دانشگاه ولی‌عصر(عج) رفسنجان

2 دانشیار، دانشکده کشاورزی، دانشگاه ولی‌عصر(عج) رفسنجان

3 استادیار، بخش گیاه پزشکی، پژوهشکده پسته، مؤسسه تحقیقات علوم باغبانی، سازمان تحقیقات آموزش و ترویج کشاورزی، رفسنجان

چکیده

بیماری پوسیدگی طوقه و ریشه (گموز) ناشی از گونه‌های مختلف فیتوفترا یکی از مهم‌ترین بیماری‌های پسته است که هرساله باعث از بین رفتن تعداد فراوانی از درختان بارور و غیر بارور می‌گردد. گرچه روش‌های مختلفی برای مدیریت این بیماری پیشنهاد شده ولی کنترل زیستی به‌عنوان یک روش سازگار با محیط‌زیست مورد توجه ویژه قرار گرفته است. در این پژوهش تأثیر ﺿﺪﻳﺖ اﺛﺮ (آنتاگونیستی) فرمولاسیون بر پایۀ پودر تالک و سبوس گندم، پنج سویۀ باکتری Pseudomonas جداسازی شده از خاک‌های منطقه‏های مختلف (سویه‌های T17-4،VUPF760 ، VUPF5، VUPF506  و CHA0) روی Phytophthora drechsleri عامل پوسیدگی طوقه و ریشۀ پسته در شرایط گلخانه‌ای بررسی شد. سویه‌های VUPF760 و VUPF506 به ترتیب با 55 و 11 درصد بیشترین و کمترین تأثیر را در کاهش شدت بیماری‌زایی داشتند. نتیجه‏های حاصل از بررسی شاخص‌های رشدی (ارتفاع نهال و همچنین وزن ‌تر و خشک اندام هوایی و ریشه) نشان‌دهندۀ افزایش این شاخص‌ها در سویۀ باکتری VUPF5 نسبت به شاهد سالم بود که به‌عنوان سویۀ برتر در این پژوهش مطرح شد.

کلیدواژه‌ها


عنوان مقاله [English]

Assessments of formulated bacterial strains against crown and root rot of pistachio trees

نویسندگان [English]

  • Badrolsadat Mahmudi mimand 1
  • Rohollah Saberi Ryseh 2
  • Mohammad Moradi Ghahderijani 3
  • Hossein Alaei Shahvali Anar 2
  • Amir Hossein Mohamadi 3
1 Former M. Sc. Student, Plant Protection Department, Faculty of Agriculture, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran
2 Associate Professor, Faculty of Agriculture, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran
3 Assistant Professor, Pistachio Research Center, Horticultural Science Research Instittute, Agriculture Research, Education and Extension Organization (AREEO), Rafsanjan, Iran
چکیده [English]

Gummosis (Crown and root rot) is the most important disease of pistachio trees caused by different species of Phytophthora which destroy significant numbers of fertile and non-fertile trees each year in Iran. Different approaches have been applied to reduce the severity and incidence of the disease. In recent years, biological control as an eco-friendly approach has been increased in the world. The effectiveness of Talk powder and Wheat bran formulations of five Pseudomonas strains (T17-4, VUPF760, VUPF5, VUPF506, and CHA0) was assessed on seedlings inoculated with Phytophthora drechsleri under greenhouse conditions. The highest and lowest reduction rates of disease severity belonged to VUPF760 and VUPF506 with 55 and 11%, respectively compared to the control and other treatments. Seedling inoculated with bacterial strains had higher heights, fresh and dry weights of shoot and roots. VUPF5 increased the ratios of height, fresh and dry weight of shoot and root by 1.4, 1.3, 1.1, 1.2, and 1.1 respectively, compared to non-inoculated control seedlings.

کلیدواژه‌ها [English]

  • Fluorescent Pseudomonas
  • Formulation
  • Gummosis
  • Pistachio
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