860618-30

860618-30
Caption: Green algae (Acetabularia peniculus and Acetabularia mediterranea). Acetabularia is a genus of green marine algae commonly found in subtropical waters. It is a single-celled organism (alga) that is the largest single cell known to science. Acetabularia has three basic parts: its rhizoid (a short set of root-like appendages that contain the nucleus and anchor the cell to a substrate) - a long median stalk and an apex, where its whorled cap forms. The genus name, Acetabularia, means 'little cup' and most species have a cup-shaped appearance at the apex. The main cellular stalk is elongated and bears a single fertile whorl (reproductive fruiting structure) at its apex. In this image A. peniculus (left) has a whorl that radiates in different planes and it not as cup-shaped as in other Acetabularia species (such as Acetabularia mediterranea - right). Also note that the whorl branches contain gametangia (reproductive cysts). Because of it size Acetabularia is important in cell biology and genetic research: particularly nucleus experiments and it role in growth and structure.
Magnification*: x24
Type: LM Darkfield
Copyright 2007 Dennis Kunkel Microscopy, Inc.
Keywords: Acetabularia,Acetabularia mediterranea,green alga,green algae,marine alga,marine algae,Eukaryota,Plantae,Chlorophyta,Ulvophyceae,Dasycladales,Polyphysaceae,860618-30,gametangia,gametangia cyst,gametangia cysts,gametangium,gametangium cyst,gametangium cysts,Acetebularia peniculus,LM,cup shaped alga,cup shaped algae,cup-shaped alga,cup-shaped algae,rhizoid,single cell,single cell alga,single cell algae,single-cell,single-cell alga,single-cell algae,single-celled,whorl,whorls,little cup,single celled,single celled alga,single celled algae,single-celled alga,single-celled algae,single celled organism,single-celled organism,Acetabularia peniculus,subtopical,subtopical alga,subtopical algae,ocean,sea water,subtropical,subtropical ocean,subtropical oceans,seawater,green marine alga,green marine algae,stalk,apex,light micrograph,06.01.12
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