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Actin and cortical fiber reticulation in the siphonaceous alga Vaucheria sessilis

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Abstract

Since light-induced organellae aggregation in the siphonaceous alga Vaucheria sessilis (Vauch.) D.C. is accompanied by the formation of a cortical fiber reticulum in the light, we proposed that this process of reticulation might be causally related to aggregation (Blatt and Briggs, 1980). In this paper we report the tentative identification of actin filaments and filament bundles in the cortical cytoplasm of V. sessilis, and present additional evidence, obtained using the inhibitors cytochalasin B and phalloidin and indicating that aggregation in response to low-intensity point irradiation with blue light is dependent upon the formation of a cortical fiber reticulum. Phalloidin stabilized the cortical fibers, preventing both reticulum formation and organelle aggregation in blue light. Cytochalasin B partially destabilized the cortical fibers to the extent of permitting light-induced reticulum formation and organelle aggregation in the light in the presence of phalloidin.

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C.I.W.-D.P.B. Publication No. 643

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Blatt, M.R., Wessells, N.K. & Briggs, W.R. Actin and cortical fiber reticulation in the siphonaceous alga Vaucheria sessilis . Planta 147, 363–375 (1980). https://doi.org/10.1007/BF00379846

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  • DOI: https://doi.org/10.1007/BF00379846

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