Biocontrol agents induce disease resistance in Phyllanthus niruri Linn against damping-off disease caused by Rhizoctonia solani [India]
2004
Kamalakannan, A. (Tamil Nadu Agricultural Univ., Coimbatore (India). Centre for Plant Protection Studies) | Mohan, L. (Tamil Nadu Agricultural Univ., Coimbatore (India). Centre for Plant Protection Studies) | Harish, S. (Tamil Nadu Agricultural Univ., Coimbatore (India). Centre for Plant Protection Studies) | Radjacommare, R. (Tamil Nadu Agricultural Univ., Coimbatore (India). Centre for Plant Protection Studies) | Amutha, G (Tamil Nadu Agricultural Univ., Coimbatore (India). Centre for Plant Protection Studies) | Chitra, K. (Tamil Nadu Agricultural Univ., Coimbatore (India). Centre for Plant Protection Studies) | Karuppiah, R. (Tamil Nadu Agricultural Univ., Coimbatore (India). Centre for Plant Protection Studies) | Mareeswari, P. (Tamil Nadu Agricultural Univ., Coimbatore (India). Centre for Plant Protection Studies) | Rajinimala, N. (Tamil Nadu Agricultural Univ., Coimbatore (India). Centre for Plant Protection Studies) | Angayarkanni, T. (Avinashilingam Deemed Univ., Coimbatore, Tamil Nadu (India). Dept. of Biochemistry)
إنجليزي. Five isolates each of Trichoderma viride and Pseudomonas fluorescens and four isolates of Bacillus subtilis were evaluated for their ability to control Rhizoctonia solani, the causal agent of damping off of Phyllanthus niruri. Among the tested isolates, TVUV10 (T. viride), PFMMP (P. fluorescens) and BSG3 (B. subtilis) showed maximum in vitro inhibition of mycelial growth of R. solani. Isolate PFMMP was also very effective in reducing disease incidence in greenhouse conditions. The effective isolates were evaluated for their ability to induce defense reactions in P. niruri plants. Earlier and increased activity of phenylalanine ammonia lyase, peroxidase, polyphenoloxidase and total phenolics were observed in biocontrol agent pretreated P. niruri plants challenged with R. solani. Isolate PFMMP caused early and increased synthesis of all defense related enzymes and total phenols. The present study showed that isolates TVUV10, PFMMP and BSG3 of T. viride, P. fluorescens and B. subtilis respectively are good candidates for the control of R. solani in P. niruri
اظهر المزيد [+] اقل [-]إيطالي. [Cinque isolati ciascuno di Trichoderma viride e Pseudomonas fluorescens e quattro isolati di Bacillus subtilis sono stati valutati in relazione alla capacità di controllo di Rhizoctonia solani, agente casuale della moria dei semenzali di Phyllanthus niruri. Fra gli isolati saggiati, TVUV10 (T. viride), PFMMP (P. fluorescens) e BSG3 (B. subtilis) hanno evidenziato la maggiore capacità di inibizione in vitro della crescita del micelio di R. solani. L´isolato PFMMP si è pure dimostrato molto efficace nella riduzione dell´incidenza della malattia in serra. E´ stata valutata la capacità degli isolati efficaci di indurre reazioni di difesa in piante di P. niruri. E´ stato riscontrato un aumento precoce di fenilalanina ammoniaca liasi, perossidasi, polifenolossidasi e dei fenoli totali in piante di P. niruri, pretrattate con gli agenti di controllo biologico, esposte a R. solani. L´isolato PFMMP determinava una sintesi precoce e maggiore di tutti gli enzimi connessi alla resistenza e dei fenoli totali. Il presente studio ha dimostrato che gli isolati TVUV10, PFMMP e BSG3 di T. viride, P. fluorescens e B. subtilis rispettivamente sono interessanti per il controllo di R. solani in P. niruri.]
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
المعلومات البيبليوغرافية
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