نتایج جستجو برای: trichoderma harzianum bi
تعداد نتایج: 52407 فیلتر نتایج به سال:
samples were collected from soil and as well from phyllosphere of rice plant and subjected to dilution plate technique on rbsf trichoderma selective medium. a total of 202 trichoderma isolates were obtained from rice fields at different geographical locations distributed all over mazandaran province. single spore isolates were obtained and genomic dna extracted from all the isolates using dna e...
Trichoderma harzianum strain ESALQ-1306 was assessed for its potential biological control against Meloidogyne incognita race 4 under in vitro and greenhouse conditions. In vitro, we noticed 64% of conidial attachment on eggs and second-stage juvenile immobilized by the fungus. In greenhouse, cucumber plants were treated with different concentrations of conidial suspensions before and after inoc...
آنزیمها ( کاتالیزورهای بیولوژیک) در مصارف بیوتکنولوژیک متعدد مانند کشاورزی ، صنایع غذایی ، تصفیه پسابها و موارد دیگر کاربردهای گوناگونی دارند. آنزیم سلولاز از جمله آنزیمهای مهم صنعتی میباشد که در کشاورزی برای تجزیه ضایعات لیگنوسلولزی، در صنایع غذایی برای کاهش سلولز مواد اولیه غذایی در صنایع کاغذسازی برای نرم کردن چوب و در مصارف مختلف دیگر کاربرد دارد. در تحقیق انجام شده در این پایان¬نامه ، ...
در این بررسی تاثیر جدایه هایی از قارچ های آنتاگونیست (t1, t2) trichoderma harzianum (t3, t4) t. viride روی بیماری پژمردگی فوزاریومی گوجه فرنگی در اثر fusarium oxysporum f.sp.lycopersici ارتفاع و وزن تربوته ها در طرح کاملا تصادفی در 6 تیمار در گلخانه و خاک آلوده به فوزاریوم روی گوجه فرنگی رقم mony meker مورد مطالعه قرار گرفت. نتایج نشان داد که جدایه های trichoderma مخلوط با خاک آلوده به فوزاریوم...
We have investigated the molecular basis for the reported synergism between peptaibols and cell wall hydrolytic enzymes in the antagonism of phytopathogenic fungi by Trichoderma harzianum. beta-Glucan synthase activity on isolated plasma membranes of Botrytis cinerea was inhibited in vitro by the peptaibols trichorzianin TA and TB, and this inhibition was reversed by the addition of phosphatidy...
Monoconidial cultures of 15 isolates of Trichoderma harzianum were characterized on the basis of 82 morphological, physiological, and biochemical features and 99 isoenzyme bands from seven enzyme systems. The results were subjected to numerical analysis which revealed four distinct groups. Representative sequences of the internal transcribed spacer 1 (ITS 1)-ITS 2 region in the ribosomal DNA ge...
Trichoderma harzianum is a filamentous fungus reported to be a producer of extracellular N-acetyl-beta-D-glucosaminidase (NAGase) when grown in chitin-containing medium. An approximately 64-kDa protein with NAGase activity was purified by gel filtration and ion exchange chromatography. The involvement of cyclic AMP (cAMP) in the synthesis of NAGase from T. harzianum in chitin-containing medium ...
جهت شناسایی عوامل قارچی پوسیدگی بنه زعفران و کنترل آنها، از مزارع و محلهای نگهداری بنه، واقع در بشرویه از توابع استان خراسان جنوبی، نمونهبرداری صورت گرفت. پس از کشت بافتهای آلوده، گونههای قارچیPenicillium digitatum، Aspergillus nigerو Rhizopus stoloniferجداسازی و شناسایی گردید. جهت کنترل این بیمارگرها از چهار غلظت از سوسپانسیون باکتری Pseudomonas fluorescens ...
The enzymes from Trichoderma species that degrade fungal cell walls have been suggested to play an important role in mycoparasitic action against fungal plant pathogens. The mycoparasite Trichoderma harzianum produces at least two extracellular beta-1,6-glucanases, among other hydrolases, when it is grown on chitin as the sole carbon source. One of these extracellular enzymes was purified to ho...
Many fungal root symbionts of the genus Trichoderma are well-known for their beneficial effects on agronomic performance and protection against plant pathogens; moreover, they may enhance protection from insect pests, by triggering plant resistance mechanisms. Defense barriers against insects are induced by the activation of metabolic pathways involved in the production of defense-related plant...
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