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portada Sexuallockstoffe Im Pflanzenreich: Jahresfeier Am 10. Mai 1972 (in German)
Type
Physical Book
Author
Publisher
Language
German
Pages
52
Format
Paperback
Dimensions
23.4 x 15.6 x 0.3 cm
Weight
0.09 kg.
ISBN13
9783531082172
Categories

Sexuallockstoffe Im Pflanzenreich: Jahresfeier Am 10. Mai 1972 (in German)

Lothar Jaenicke (Author) · Vs Verlag Fur Sozialwissenschaften · Paperback

Sexuallockstoffe Im Pflanzenreich: Jahresfeier Am 10. Mai 1972 (in German) - Jaenicke, Lothar

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Synopsis "Sexuallockstoffe Im Pflanzenreich: Jahresfeier Am 10. Mai 1972 (in German)"

Ihre Biosynthese erfolgt aus kleinen Bausteinen, ahnlich derjenigen der Fett- sauren. Ihre Wirkungsweise als Signalstoffe wird in der spezifischen Bin- dung an Rezeptorproteine in der Gameten-Membran vermutet, die dadurch ihre Raumstruktur andern und somit einen Impuls auslosen. Dieser wird in "Richtung" oder "Geschwindigkeit" umgesetzt, so daB die Gametenzelle topotaktisch oder phobotaktisch das Ziel, die Duftstoffquelle, erreicht. Diese kann durch einen kiinstlichen Duftstofftrager ersetzt werden, durch den man die wahrnehmbare Grenzkonzentration ermitteln kann. Darauf begrundet sich der quantitative Nachweis, der fur die Erforschung des Wirkmechanis- mus, als Modell fur die Vorgange beim Geruchs- und Geschmackssinn, notig ist. Summary Sex hormones play an important role in the development and differentia- tion of sexual determination and reproduction; although research in this field has been largely confined to animal studies, these phenomena find their analogs in plants as well. Algae, mosses and fungi are lower plants that are we11 suited for studying these chemical agents and their influence on respective "targets". Sexual determinants and attractants have recently been isolated, identified, and their biological properties characterized. A termone (sex determining hor- mone) from the mold Mucor determines the gender of sti11 undifferentiated hyphae. This compound (trisporic acid) is a carotenoid closely related to retinene. In the saprophyte Achlya, the action of Antheridiol precipitates of the male sexual apparatus (antherids). This molecule is a the formation substituted steroid much like its animal counterparts.

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