Cladosporium cucumerinum

Stermer, B.A. Hammerschmidt, R. (1984). Heat shock induces resistance to Cladosporium cucumerinum and enhances peroxidase activity in cucumbers. Physiological Plant Pathology, 25, 239-49. 

Polybrominated diphenyl ethers from the Indonesian marine sponge Dysidea herbacea are active against the Gram-positive bacteria Bacillus subtilis (MIC 0.20 pg/ml) and the phytopathogenic fungus Cladosporium cucumerinum. Compounds 90 and 91 are also active in the brine shrimp lethality test (LC50 0.96 and 0.94 pg/ml) [81]. 

In addition to this local resistance, biotic agents may induce systemic resistance. Infection of the first true leaf of cucumber plants with Colletotrichum lagenarium immunized other aerial plant parts against infection by lagenarium, Cladosporium cucumerinum and Pseudomonas lachrymans (16). Bean plants appeared systemically protected against Colletotrichum lindemuthlanum when the first leaf had been inoculated with a non-pathogenic race of this fungus or with... 

Figure 10.5 Plant cell cultures have proven to be very useful for studying plant-pathogen interactions and isoprenoid metabolism. Tobacco cell cultures respond rapidly to the addition of fungal elicitors (0.5 pg cellulase/ml of culture) by browning (A) (analogous to a hypersensitive response) and the production of phytoalexins (B). Media was collected from elicited cell cultures at the indicated times, partitioned against an organic solvent, and concentrated aliquots run on a silica TLC plate. The plates were then sprayed with a suspension of Cladosporium cucumerinum spores and incubated in a humid environment for 5 days before viewing (B). The compound released from the elicitor-treated tobacco cells that inhibits spore germination is capsidiol, a sesquiterpene.

Figure 2. Time course of lignin accumulation in cucumber (Cucumis sativus) leaves in presence or absence of challenge infection by the pathogen Cladosporium cucumerinum. (—O—) immunized by prior limited infection by C lagenarium, challenged with same pathogen immunized, not...

Prepare a slope of Cladosporium cucumerinum (IMI-299104) from a culture and allow to sporulate for 2 d. 

Dellar et al. (55) isolated the antifungal sesquiterpenes aristolen-2-one (Compound 9) and prostantherol (Compound 10) from two species of Prostanthera (Labiatae). Activity was assessed and tracked through the separation procedure by the use of direct bioautography with Cladosporium cucumerinum as the target fungus. 

Eriotrichin B 70 (also called Bidwillon A) was found 10 be antibacterial against S aureus with MIC50 of 8.3 pg/ml [20], while 2,3-dihydropratcnscin (5 7,3 -trihydroxy-4 -methoxyisoflavanone) 71 showed antifungal activity against Cladosporium cucumerinum (2 pg) in a TLC bioautography preliminary assay [12]. Orientanol F 72 showed Anti-MRSA... 

The microbial cultures of isolates and their antifungal agents strongly inhibited growth of F. oxysporum and also many other plant pathogenic fungi F. solani, F. moniliforme, F. roseum, Biporaris sorokiniana, Alternaria alternata, Cladosporium cucumerinum, Pyricularia oryzae, Pythium graminicolum, Verticillium dahliae, Cylindrocarpon sp., Rhizoctonia soIani(Table III, IV). 

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