. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. G P- marinus • MBM film • Diatom film M Bacterial film D Control 25 60 SHELL SUBSTRATE. TIME (min) Figure 5. Mean percentage of attraction of pre-metamorphic Con- fhiilcpas concholepas larvae to different microbial films. Microbial films prepared on glass (a) and C. concholepas shells (b). periment. larvae exposed to the bacterial films exhibited an increased ciliar movement, but this response was sig- nificantly less than that observed for the other two treat- ments (P < , G test with 1 df) (Fig. 6b). Discussion Muc
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. G P- marinus • MBM film • Diatom film M Bacterial film D Control 25 60 SHELL SUBSTRATE. TIME (min) Figure 5. Mean percentage of attraction of pre-metamorphic Con- fhiilcpas concholepas larvae to different microbial films. Microbial films prepared on glass (a) and C. concholepas shells (b). periment. larvae exposed to the bacterial films exhibited an increased ciliar movement, but this response was sig- nificantly less than that observed for the other two treat- ments (P < , G test with 1 df) (Fig. 6b). Discussion Mucus and hcmolymph Early pre-competent larvae of Concholepas concholepas stopped swimming, sank, and remained inactive on the bottom of the wells when exposed to both mucus and hemolymph of adult individuals. Traces of mobile animals (, mucus) can influence the settlement of sessile ani- mals (, barnacles) (Johnson and Strathmann. 1989). and conspecific mucus induces larval settlement in the abalone Haliotis rufescens (Slattery. 1992). Structural factors such as glycoproteins and growth factors as well as bacteria associated with mucus have been suggested as possible morphogens involved in triggering the larval set- tlement response in gastropods (Slattery, 1992; Cantillana and Inestrosa, 1993). Recently, a heparin-binding growth factor, which shows properties similar to those of fibroblast growth factors (FGF), has been identified in the foot of C. concholepas (Cantillana and Inestrosa, 1993). The binding of basic FGF to high-affinity receptors requires the presence of an ECM component (, heparan sulfate proteoglycans) (Yayon el ai, 1991). Therefore, it is pos- sible that growth factors in the mucus of mollusc species could be interacting with ECM molecules (mainly sulfated polysaccharides) and then with high-affinity growth factor receptors. On the other hand, it has been hypothesized that lectins ( sugar-binding proteins or glycoproteins of non-immune orig
Size: 1739px × 1437px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
