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جمالی, فاطمه, بیات, فرشته. (1394). مطالعه فنوتیپی و ژنوتیپی Pseudomonas fluorescens جدایه PGU0 و ارزیابی توانایی بیوکنترلی آن علیه Rhizoctonia solani عامل مرگ گیاهچه لوبیا. , 4(1), 37-46. doi: 10.22059/jbioc.2015.54875
فاطمه جمالی; فرشته بیات. "مطالعه فنوتیپی و ژنوتیپی Pseudomonas fluorescens جدایه PGU0 و ارزیابی توانایی بیوکنترلی آن علیه Rhizoctonia solani عامل مرگ گیاهچه لوبیا". , 4, 1, 1394, 37-46. doi: 10.22059/jbioc.2015.54875
جمالی, فاطمه, بیات, فرشته. (1394). 'مطالعه فنوتیپی و ژنوتیپی Pseudomonas fluorescens جدایه PGU0 و ارزیابی توانایی بیوکنترلی آن علیه Rhizoctonia solani عامل مرگ گیاهچه لوبیا', , 4(1), pp. 37-46. doi: 10.22059/jbioc.2015.54875
جمالی, فاطمه, بیات, فرشته. مطالعه فنوتیپی و ژنوتیپی Pseudomonas fluorescens جدایه PGU0 و ارزیابی توانایی بیوکنترلی آن علیه Rhizoctonia solani عامل مرگ گیاهچه لوبیا. , 1394; 4(1): 37-46. doi: 10.22059/jbioc.2015.54875

مطالعه فنوتیپی و ژنوتیپی Pseudomonas fluorescens جدایه PGU0 و ارزیابی توانایی بیوکنترلی آن علیه Rhizoctonia solani عامل مرگ گیاهچه لوبیا

کنترل بیولوژیک آفات و بیماری های گیاهی
مقاله 5، دوره 4، شماره 1، فروردین 1394، صفحه 37-46    اصل مقاله (676.89 K)
نوع مقاله: مقاله پژوهشی
شناسه دیجیتال (DOI): 10.22059/jbioc.2015.54875
نویسندگان
فاطمه جمالی* ؛ فرشته بیات
استادیار گروه اصلاح نباتات، دانشکدة کشاورزی و منابع طبیعی، دانشگاه خلیج‌فارس بوشهر
چکیده
سودوموناس‌های فلورسنت مولد آنتی‌بیوتیک 2 و 4ـ دی استیل فلورو گلوسینول(DAPG)  برای استفاده به‌عنوان عوامل بیوکنترل، در سراسر دنیا، به‌خوبی مطالعه شده‌اند. استرین Pseudomonas fluorescens PGU0 از ریزوسفر آفتابگردان در استان بوشهر جداسازی شد. آزمون کشت متقابل مشخص کرد که این استرین در شرایط درون‌شیشه‌ای فعالیت آنتاگونیستی علیه قارچ Rhizoctonia solani روی محیط‌های کشت مختلف را دارد و در شرایط اتاقک رشد نیز موجب کاهش شدت بیماری (52 درصد) و افزایش وزن خشک گیاهچه‌های آلودة لوبیا (80 درصد) می‌شود. واکنش زنجیره‌ای پلیمراز با پرایمرهای اختصاصی، وجود ژن‌های کلیدی (phlD، hcnBC و pltB) دخیل در بیوسنتز متابولیت‌های ضد میکروبی، به‌ترتیب،Phl ، پایولوتورین (PLT) و سیانید ‌هیدروژن (HCN) را مشخص کرد. تولید آنتی‌بیوتیک‌ها با کروماتوگرافی مایع با کارایی بالا (HPLC) بررسی و مشخص شد این باکتری توانایی تولید آنتی‌بیوتیک‌های DAPG و PLT را دارد. همچنین، تولید سیانید ‌هیدروژن و سیدروفور در شرایط آزمایشگاهی توسط این باکتری به اثبات رسید. آنالیز فیلوژنتیکی 16S rDNA شباهت این استرین را با سایر استرین‌های بیوکنترل مهم دنیا اثبات کرد که می‌توانند متابولیت‌های ضد میکروبی نظیر Phl و Plt را تولید کنند.
کلیدواژه‌ها
بیوکنترل؛ پایولوتورین؛ سیانید ‌هیدروژن؛ 2 و 4 ـ دی استیل فلورو گلوسینول
عنوان مقاله [English]
Phenotypic and genotypic study of Pseudomonas fluorescens strains PGU0 and assessment of its biocontrol against Rhizoctonia solani, the causal agent of bean damping- off
نویسندگان [English]
Fatemeh Jamali؛ Fereshteh Bayat
Assistant Professors, Plant Breeding Department, College of Agriculture and Natural resources, Persian Gulf University, Booshehr, Iran
چکیده [English]
Fluorescent pseudomonads producing 2,4-diacetylphloroglucinol (DAPG) antibiotic have been well studied for use as biocontrol agents around the world. Pseudomonas fluorescens PGU0 strain was isolated from the rhizosphere of sunflower in Bushehr Province. Dual culture test showed that the strain had antagonistic activity against Rhizoctonia solani fungus on different media cultures; moreover, under growth chamber condition, the strain reduced disease severity by 52% and caused an increase in dry weight of infected bean seedlings by 80%. The polymerase chain reaction (PCR) using specific primers, demonstrated the presence of key genes (phlD, hcnBC and pltB) involved in the biosynthesis of antimicrobial metabolites Phl, Pyoluteorin (PLT) and hydrogen cyanide (HCN), respectively . Antibiotic production was examined by high-performance liquid chromatography (HPLC) and it was found that these bacteria are capable of producing DAPG and PLT antibiotics. On the other hand, production of hydrogen cyanide and siderophore by the bacterium was demonstrated under lab conditions. Phylogenetic analysis of 16S rDNA proved similarity of this strain with other world biocontrol strains capable of producing antimicrobial metabolites like Phl and Plt.
کلیدواژه‌ها [English]
Biocontrol, 2, 4-diacetylphloroglucinol, pyoluteorin, hydrogen cyanide
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