BIOL 103 Lecture Notes - Lecture 6: Vincent Wigglesworth, Tobacco Mosaic Virus, Chagas Disease
21 Oct 2017
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Deterrents (not induced response): e. g. ouabin bounds na+k+ atpase prevents beetles from eating seeds, e. g. capcaisin: hot pepper receptors protect plants from predators. Defenses against virus, bacteria, fungi, nematodes, protists, herbivores. Salicylic acid etc: salicylic acid goes through circulatory system to destroy pathogen, or metal group added to salicylic acid sends signal via the air to plant nearby faster and efficient. Rhodnius/ the kissing bug vector for trypanosomes (like tste flies) leads to chagas disease. 850 genes encoding coat proteins hard to counteract, no vaccines stroke, coma, heart attack etc. rhod(cid:374)ius (cid:862)kiss(cid:863) hu(cid:373)a(cid:374) lips can produce feces during trypanosomes that can circulate around blood system etc. Sir vincent wigglesworth: study of rhodnius, vector of chagas disease: worked at cambridge on insect physiology. Wigglesworth discovered that hormones from head after blood meal would start process of molting diffusible substances (even from body of one nymph to another) direct development.
