Aguado & Marin (2007) analysed the interaction between Cratena peregrina (Gmelin, 1791) and predatory fish in laboratory and field assays, using both live aeolids and artificial models. Penney’s comment (2009) on the article reopens the old question of the role of nematocyst-based defence in nudibranchs. Penney suggests that the defensive mechanism of C. peregrina is chemical because the nemato...

Microcomplement fixation was employed to compare the immunological differences that occur between purified inhibitor I from potato tubers, the four purified protomers that comprise it, and inhibitor I from tuber and leaf extracts. Total inhibitors of chymotrypsin and trypsin in leaves of seven genera of the Solanaceae were identified by enzymatic assay. In leaves of three genera, Solanum, Lycop...

To assess bioinsecticidal effects of Pergularia tomentosa on Locusta migratoria cinerascens, crude alkaloids were extracted from aerial part of the plant. Newly emerged fifth instar larvae were treated by forced ingestion. Results showed that the test compound exhibited a considerable larvicidal effect with a dose-dependent mortality. On the other hand, it also caused antifeeding effect, weight...

Degradation of chlorophyll in spinach (Spinacia olearacea L. cv. Hybrid 612) appeared to be regulated through the peroxidase-hydrogen peroxide pathway, which opens the porphyrin ring, thus resulting in a colorless compound. This conclusion was arrived at from the analysis of chlorophylls (Chls) and their metabolizes by HPLC and of enzyme activities catalyzing the degradative reactions. Chls dec...

Seifers, D. L., and Martin, T. J. 1988. Correlation of low level wheat streak mosaic virus resistance in Triumph 64 wheat with low virus titer. Phytopathology 78:703-707. Wheat streak mosaic virus (WSMV) reduced the yield of Triumph 64 immunosorbent assay (ELISA). As incubation temperature increased from (cultivar having a low level of resistance to virus multiplication) by 18% 15 to 30 C, diff...