Fungi Sclerotium rolfsii

Many fungi are capable of producing extracellular enzymes that can degrade cellulose. They are Trichoderma (T) reesei, T. viride, T. koningii, T. lignorum, Penicillium funiculosum, Fusarium solani, Sclerotium rolfsii, and so on. Bacterial species such as Cellulomonas along with Clostridium thermocellum can also produce cellulases (Marsden and Gray, 1986). 

It has been demonstrated that in the mycoparasite Trichoderma. lectin binding probably accounts for the specificity of host identification (, Q.). Two host fungi (Rhizoctonla aolanl and Sclerotium rolfsii) possess surface lectins with binding specificity for galactose residues that are present on the mycoparasite surface. 

Kuhn, Sclerotinia sclerotiorum (Lib.) de Bary and Sclerotium rolfsii Sacc.). It was demonstrated that S. sclarea essential oil had a lethal effect on five of the six pathogens tested the most susceptible microorganisms were B. cinerea and S. rolfsii (MIC between 1.3 and 1.6 mg/ml) while Fu-sarium solani was insensitive (MIC >5.4 mg/ml). The chromatographic fractions were less active compared with essential oil in toto. The most marked inhibitory action was observed with the alcohol-containing fractions. All in all, these observations indicate that further research should be done to evaluate both the synergic action of the components of the different fractions and the activity of the essential oil in toto, when applied directly to the plant species infected by the fungi, in suitable formulations. 

Peana and Moretti [68] reported that S. desoleana essential oil had in vitro a lethal effect on some phytopathogenic fungi (Botrytis cinerea, Fusarium solani, Phytophthora nicotianae var. parasitica, Rhizoctonia solani, Scle-rotinia sclerotiorum and Sclerotium rolfsii). The chromatographic fractions of the oil were less active compared with the essential oil in toto. The most marked inhibitory action was observed in the alcohol-containing fractions, and was not so evident as that obtained from the essential oil of S. sclarea. The activity of the essential oil in toto, also in this case, if ap-... 

Sclerotium rolfsii Fungi OA. EtOH. 6 days. 20X 20,000 Narasimba Rao et al. (1971)... 

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