DiatomBase
5 天之前 · The diatoms are an amazing group of organisms, part of the Stremenopile lineage of life. These photosynthetic unicells (ranging from 1 µm to over 1 mm in size) have chlorophylls a and c, and a complement of accessory pigments that include xanthophylls and carotenoids, making the living cells golden-brown in color.
Diatoms - Microscopy of Nature
The chloroplasts of diatoms have a brown color because, in addition to chlorophyll, they also contain the brown pigment fucoxanthin. Fucoxanthin is also found in brown seeweed that is common on beaches.
Diatom - Wikipedia
A diatom (Neo-Latin diatoma) [a] is any member of a large group comprising several genera of algae, specifically microalgae, found in the oceans, waterways and soils of the world.
Diatoms – Definition, Structure, Life Cycle, Importance
2024年4月9日 · A diatom is a tiny, single-celled algae with a hard shell made of silica, found in oceans, waterways, and soil. They play a crucial role in oxygen production, nutrient cycling, and the food web of aquatic ecosystems.
Diatoms, unicellular photosynthetic algae – Inanimate Life
The coloration of the diatoms, and of the photosynthetic members of the heterokont/chromista/ochrophyte group as a whole, is brown or yellow-brown (ocher is a yellow/brown color) and comes from the presence of a different pigment, chlorophyll c, in addition to chlorophyll a.
CalSpace/SIO/Earthguide-Diatoms-Internal parts-California Current
Chloroplasts are the most noticeable internal component of almost all diatoms, giving the diatom its color and photosynthetic capabilities. The photomicrograph of Coscinodiscus shown below exhibits numerous yellowish-brown chloroplasts in an otherwise clear organism.
Diatom | Description, Characteristics, & Reproduction | Britannica
2025年1月2日 · diatom, (class Bacillariophyceae), any member of the algal class Bacillariophyceae (division Chromophyta), with about 16,000 species found in sediments or attached to solid substances in all the waters of Earth.
Diatom - Features, Characteristics, Types, Reproduction and Uses
Diatoms have silica in their shell wall. Their cell wall is called a shell or frustule. The color of the shell of the diatoms is generally transparent. Diatoms can be found in both freshwater and marine environments. The shell wall of diatoms contains silica. Shell or frustule is the name for their cell wall. The shell walls of diatoms overlap.
Diatom - an overview | ScienceDirect Topics
A diatom is a unicellular, eukaryotic organism with a cell wall heavily impregnated with silica, appearing golden-brown in color. They play a crucial role in the global carbon cycle, contributing significantly to oceanic photosynthesis and carbon fixation.
4.4: Diatoms - Biology LibreTexts
Figure \(\PageIndex{6}\): This image shows many diatoms, though they tend to be clumped on either side of the picture. When they are clumped together, they appear much more golden in color. This is due to their golden chloroplasts, which contain the carotenoid fucoxanthin. Photo by Melissa Ha, CC-BY-NC. Figure \(\PageIndex{7}\): Epiphytic diatoms.