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1987 (1)
1984 (2)
1Author    IngoM. Aier, D. Ieter, G. M. ÜllerRequires cookie*
 Title    Sexual Pheromones and Related Egg Secretions in Laminariales (Phaeophyta)  
 Abstract    Volatile egg secretions of 15 species belonging to 5 families of the brown algal order Laminariales have been analyzed by high resolution glass capillary gas chrom atography. 16 com­ ponents have been identified and partially determ ined quantitatively. The composition of the pherom one bouquets and pherom one specificity for induction of spermatozoid-release and -chemotaxis are discussed in respect to ecophysiological functions and significance as chemo-taxonom ic markers. 
  Reference    Z. Naturforsch. 42c, 948 (1987); received April 16. 1987 
  Published    1987 
  Keywords    Pherom ones, Sexuality, Phaeophyceae, Lam inariales, Closed-Loop Technique, Chemotaxonomy 
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 TEI-XML for    default:Reihe_C/42/ZNC-1987-42c-0948.pdf 
 Identifier    ZNC-1987-42c-0948 
 Volume    42 
2Author    Rainer Gilles, Claudia Gilles, Lothar JaenickeRequires cookie*
 Title    Pheromone-Binding and Matrix-Mediated Events in Sexual Induction of Volvox carteri  
 Abstract    Sexual differentiation o f the reproductive cells (gonidia) o f the green alga Volvox carteri f. nagariensis Iyengar is triggered by a glycoprotein inducer which is released into the medium by sexual male spheroids. If added, it induces the next generation cycle to becom e sexual. About 3000 pheromone molecules per spheroid will give full induction. Specific binding sites for the pheromone have been identified in the extracellular matrix in which characteristic events take place. Inducer binding and action are reversible for a certain tim e period until the start o f cell division; thereafter, determination o f the gonidia is final. Extent o f sexual induction is proportional to the duration o f inducer pulses. Inhibition o f sexual induction reveals as essential extracellular components o f the induction system high m olecular acidic glycoproteins, cyclic nucleotides, Ca2+/calm odulin, and pherom one-controlled gene products. Low matrix levels o f cyclic AMP and cyclic GMP seem to stim ulate induction; high levels to inhibit. 
  Reference    Z. Naturforsch. 39c, 584 (1984); received March 7. 1984 
  Published    1984 
  Keywords    Volvox carteri, Sexual Induction, Extracellular Matrix, Pherom one, Cyclic N ucleotides 
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 TEI-XML for    default:Reihe_C/39/ZNC-1984-39c-0584.pdf 
 Identifier    ZNC-1984-39c-0584 
 Volume    39 
3Author    -J Mamer, B. Müller, L. JaenickeRequires cookie*
 Title     
  Reference    Z. Naturforsch. 39c, 689—691 (1984); received March 1 1984 
  Published    1984 
  Keywords    Desm arestene-l'-epoxide, Laminariales, Pherom ones, Sex-Attractant, Spermatozoid-R elease 
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 TEI-XML for    default:Reihe_C/39/ZNC-1984-39c-0689_n.pdf 
 Identifier    ZNC-1984-39c-0689_n 
 Volume    39