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علوم باغبانی، جلد ۳۲، شماره ۴، صفحات ۶۱۵-۶۲۸
عنوان فارسی مقایسه عملکرد اسانس‌ها و عصاره‌های گیاهی با یک پپتید نوترکیب در کنترل عوامل مهم بیماری‌زای قارچ خوراکی تکمه‌ای سفید
چکیده فارسی مقاله در پژوهش حاضر اسانس گیاهان‌ زیره سبز (Cuminum cyminum)، آویشن شیرازی (Zataria multiflora) و دو عصاره‌ی اِتانولی گیاهان کندل (Dorema ammoniacum) و چویل (Ferulago angulata) در مقایسه با یک پپتید نوترکیب کایمری (لاکتوفرسین-لاکتوفرامپین) که از مهمترین اجزا ضد میکروبی شیر شتر می‌باشد جهت مهار عوامل بیماریزای قارچ خوراکی تکمه‌ای سفید، شامل باکتری Pseudomonas tolaasii و قارچ Trichoderma harzianum مورد ارزیابی قرار گرفتند. اسانس‌گیری با استفاده از کلونجر و عصاره‌ها با استفاده حلال متانول 80 درصد و با روش خیساندن بدست آمد. پپتید نوترکیب کایمری از سلول‌های کلیه جنین انسان (HEK 293) استحصال شد. خصوصیات ضد باکتریایی و قارچی ترکیبات مورد آزمایش به ترتیب با استفاده از روش دیسک و اختلاط با محیط کشت بررسی گردید. حداقل غلظت بازداندگی (MIC) و حداقل غلظت کُشندگی برای باکتری (MBC) و قارچ (MFC) محاسبه شد. تمام آزمایش‌ها با سه تکرار در قالب طرح کاملاً تصادفی انجام پذیرفت. نتایج ارزیابی‌های ضد باکتریایی نشان داد که پپتید کایمری، در غلظت 20 میکروگرم بر میلی‌لیتر بیشترین‌ عملکرد را با میانگین قطر هاله بازدارنده 2/32 میلی‌متر در بین ترکیبات مورد بررسی داشت و بعد از آن اسانس زیره سبز و عصاره کندل به ترتیب با هفت و شش میلی‌متر دارای بیشترین اثر ضد باکتریایی بودند. نتیجه اثرات ضد قارچی ترکیبات مورد آزمایش در مدت زمان هفت روز نشان داد که اسانس‌های گیاهان زیره سبز و آویشن شیرازی بطور کامل از رشد قارچ T. harzianum جلوگیری کردند و بعد از آن عصاره گیاهان کندل و چویل با میانگین رشد کُلنی قارچ به میزان 26 و 66/60 میلی‌متر بیشترین اثر ضد قارچی را دارا بودند. کمترین اثر ضد قارچی در مورد پپتید نوترکیب کایمری بدست آمد. با توجه به نتایج این پژوهش، پپتید کایمری اثرات ضد باکتریایی بیشتری در مقایسه با اسانس‌ها و عصاره‌های گیاهی دارا بود و در مقابل اسانس‌ها و عصاره‌ها در مقایسه با پپتید مورد آزمایش از توان ضد قارچی بیشتری برخوردار بودند.
کلیدواژه‌های فارسی مقاله اسانس گیاهی، اثرضد میکروبی، پپتید کایمری، عصاره گیاهی، قارچ تکمه‌ای سفید،
عنوان انگلیسی Comparison of Antimicrobial Activity of Essential Oils and Plant Extracts with Recombinant Peptide in Controlling of Some Pathogens of Cultivated White Button Mushrooms
چکیده انگلیسی مقاله Introduction: The most serious diseases of cultivated mushrooms are caused by Pseudomonas tolaasii and Trichoderma harzianum pathogens. A common method of pathogen control on farms worldwide is the application of various chemical pesticides. Many of these substances are unsafe for human and environment. The interest in discovering and developing natural antimicrobials has significantly increased due to consumer preferences for foods that are free of chemical residues. So, a major challenge for mushroom growers is to control diseases with alternative compounds such as essential oils and plant extracts. Antimicrobial peptides (AMPs) were also known as potential antibiotic and considered as a new antimicrobial agents. In the present study, the antibacterial and antifungal potential of essential oils, plant extracts and a recombinant peptide were investigated for their pathogenicity. For this purpose, the essential oils of Cuminum cyminum and Zataria multiflora and the plant extracts of Dorema ammoniacum and Ferulago angulata and a recombinant peptide were evaluated for their antimicrobial and antifungal effects on the P. tolaasii and T. harzianum pathogens. Materials and Methods: In this study, essential oils of C. cyminum and Z. multiflora were extracted by hydrodistillation in a Clevenger-type apparatus. The plant extracts (D. ammoniacum and F. angulata) were prepared using maceration method. Recombinant peptides (Lactoferricin-Lactoferrampin) were produced from Adherent Human Embryonic Kidney 293 (HEK293). The antifungal properties of essential oils, plant extract and AMPs were studied on growth inhibition. Antibacterial activity of substances were tested against P. tolaasii via disk-diffusion method respectively. Minimum inhibitory concentration (MIC), Minimum bactericidal concentration (MBC) and Minimum fungicidal concentration (MFC) to the compounds were studied. All treatments were considered in a completely randomized block design with three replicates. Results: The results of the antibacterial evaluations showed that the Chimera peptide have remarkable activity against pathogenic bacteria with a mean diameter of the zone inhibition region of 32.2mm, followed by C. cyminum and D. ammoniacum extracts with mean values of 7 and 6 mm respectively. Regarding to antifungal activity of substances isolated from above material, it was found that essential oils of C. cyminum and Z. multiflora completely prevent the growth of T. harzianum, followed by D. ammoniacum and F. angulate with maen values of 26 and 60.6 mm respectively. The lowest antifungal activity was observed for chimera peptide. Discussion: The cultivated button mushroom is one of the most extensively cultivated mushroom in the world. The most serious diseases of cultivated mushrooms are caused by P. tolaasii and T. harzianum pathogens. The results of our study showed that the C. cyminum and D. ammoniacum have remarkable activity against pathogenic bacteria. Plant extracts, essential oils and their components have demonstrated strong fungistatic and antibacterial effects against pathogenic fungi and bacteria on cultivated mushrooms. Modes of action of essential oils in their interaction with bacteria have been quite revealed. It has been assumed that Thymol changes the permeability of cytoplasmic membrane of Gram-positive bacteria, acting as a proton exchanger, decreasing the pH gradient and causing a collapse of the proton motive force and eventually cell death. Regarding to antifungal activity, our results also showed that essential oils of C. cyminum and Z. multiflora completely prevent the growth of T. harzianum, followed by D. ammoniacum and F. angulate. One of the possible action mechanisms proposed that fungal growth may be reduced or totally inhibited due to monoterpenes present in essential oils which could increase the concentration of lipidic peroxides such as hydroxyl, alkoxyl and alkoperoxyl radicals and so bring about cell death. According to another mechanism, the essential oils would act on the hyphae of the mycelium, provoking exit of components from the cytoplasm, the loss of rigidity and integrity of the hypha cell wall, resulting in its collapse and death of the mycelium. In our study, a camel recombinant chimeric lactoferricin + lactoferrampin peptide was also tested for its antimicrobial activity. Our result showed that this recombinant peptide have remarkable activity against pathogenic bacteria. The details of the antibacterial mechanism for this recombinant peptide still are unknown. However, amino acid profile, sequence orientation and structural conformation of cationic peptides are the main features which make these peptides capable to inhibit bacterial growth by disrupting of the bacterial cell membrane. As a general results it can be concluded that natural plant-derived antimicrobial as well as recombinant peptides can be used as alternatives to synthetic pesticides, however, further studies on safety and toxicity of these substances should be carried out before use. Conclusion: In summary, this study shows that essential oils and plant extracts isolated from above plant material have remarkable antifungal activities against T. harzianum, while the chimera peptide showed complete inhibition against P. tolaasii. Thus all of these substance could become alternative to synthetic antimicrobial compounds for control of mushroom pathogens. However, further studies on safety and toxicity of these substances should be carried out before use.
کلیدواژه‌های انگلیسی مقاله اسانس گیاهی, اثرضد میکروبی, پپتید کایمری, عصاره گیاهی, قارچ تکمه‌ای سفید
نویسندگان مقاله فرج اله شهریاری |
فردوسی

عباس تنهائیان |
فردوسی مشهد

مهدی اخلاقی |
فردوسی مشهد

نرگس نظیفی |
فردوسی

نشانی اینترنتی https://jhs.um.ac.ir/article_36646_7dcecd32f05b76f750c3ad6923fceeea.pdf
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