Glomerella cingulata

One of the latest reports in this area described the biotransformation of citronellol by the plant pathogenic fungus Glomerella cingulata to 3,7-dimethyl-l,6,7-octanetriol [47]. 

Finally, a Japanese group also studied the biotransformation of Z- and -nerolidol [137,138] with the plant pathogenic fungus Glomerella cingulata. Both Z- and -nerolidol were mainly oxidised at the remote double bond. Z-Nerolidol (162) was transformed into (Z)-3,7,11-trimethyl-l,6-dodecadiene-3,10,11-triol (164) while -nerolidoI (158) was mainly oxidised to ( )-3,7,11-trimethyl-l,6-dodecadiene-3,ll-diol (171) only small amounts of ( )-3,7,11-trimethyl-l,6-dodecadiene-3,10,11-triol (160) were obtained, Fig. (34). 

Fig. (34). Hydroxylation of -nerolidol and Z-nerolidol by Glomerella cingulata (after [137,138])...

More recently, the biotransformation of (2 ,6 )-famesol (181a) was also carried out by a Japanese group [141] using the fungus Glomerella cingulata. At the first step, oxidation proceeded at the remote double bond to give (2.E,6 )-3,7,11 -trimethyl-2,6-dodecadien-l,l 1-diol (184) and (22 , 6E)-3,7,11 -trimethyl-2,6-dodecadien-l,10,ll-triol (185). In the second step, the diol (184) was further hydroxylated to (22 ,62s)-3,7,ll-trimethyl-2,6-dodecadien-l,5,ll-triol (186), which was further isomerised to its (2Z,6 )-isomer (187), Fig. (36). 

Glomerella cingulata), sooty blotch (Gloeodes pomigena), fly speck (Microthyrlella rubi) and Brooks spot (Mycosphaerella pond). 

Brook, P. J., Protective function of an ultraviolet absorbing compound associated with conidia of Glomerella cingulata, NZ J. Bot., 19, 299, 1981. 

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