Crop plants resistance

Insect pests and pathogens (fungi, bacteria and viruses) are responsible for severe crop losses. Insects feed directly on the plant tissues, while the pathogens lead to damage or death of the plant. Plants have evolved a certain degree of resistance through the production of defence compounds, which may be aproteic, e.g. antibiotics, alkaloids, terpenes, cyanogenic glucosides or proteic, e.g. chitinases,b-1,3-glu-canases, lectins, arcelins, vicilins, systemins and enzyme inhibitors.

16p research12 23-04-2013 44 3   Download

Saccharomyces cerevisiaehas been used as a model system to characterize the effect of cytochromebmutations found in fungal and oomycete plant pathogens resistant to Qo inhibitors (QoIs), including the strobilurins, now widely employed in agriculture to control such diseases. Specific residues in the Qosite of yeast cytochromebwere modified to obtain four new forms mimicking the Qobinding site of Erysiphe graminis, Venturia inaequalis, Sphaerotheca fuligi-neaandPhytophthoramegasperma.

8p dell39 03-04-2013 34 3   Download