Question

guys..plz help✌️...give some clear description of chrysophytes​

Answer 1

CHRYSOPHYTES =

• Golden algae, also known as golden brown algae (golden-brown algae), golden brown, in addition to containing chlorophyll, but still together have more carotenoids . The type of single cell swimming, no cell wall , there is a type of cell wall , and its constituent substance is mainly pectin . With one or two terminal flagella (three rare), flagella are equal or unequal in length. The stored food is oil and wheat albumin. Propagation methods include breaking (group species), splitting, and producing zoospores (flagellate-free species); sexual reproduction is rare and belongs to the same species. Mainly distributed in clear fresh water with lower temperature.

Introduction

• Chrysophyta is an algae plant. Algae are single cells or integrated groups that float on the water or attach to other organisms. Golden algae are generally golden brown and contain a lot of substances such as chlorophyll and carotenoids. Chlorella is a type of single-brain brain swimming, which has no cell wall, but there are cell wall materials, mostly pectin. Normally, Chlamydomonas has 1 or 2 terminal flagella, which are equal or unequal in length. Oils and wheat albumin are the main storage food for Chlorella. There are many methods of reproduction, such as breaking (group species), splitting, and producing zoospores (types without flagella); sexual reproduction is rare and belongs to the same mating. The clear fresh water with lower temperature is the main distribution area of golden algae. Of course, Chlorella is also a category in the plant classification system. It contains a lot of carotene and natural pigments, and the color is mostly yellow-green or golden brown. Gold algae polysaccharides (Golden Algae Laminaria) and oils and fats are the main storage products, without starch. The classification criteria for gold algae can be divided by the presence or absence of flagella, single cells or groups.

Morphological structure

Flagella

• Most Chlamydomonas is a bare, sporty individual with two flagella, and one or three flagella each. Flagellar type, there are 1-2 telescopic bubbles at the base of the flagella .

No cell wall

• Most golden algae are bare sporting individuals with no cell wall. Some species have silicified scales, small spines or capsules on the surface. Some species contain many siliceous and calcareous materials, and some siliceous materials can be specialized into bone-like structures.

Pigments and pigment bodies

• The photosynthetic pigments of gold algae are chlorophyll a , c, β-carotene. 1-2 chromosomes, flakes, lateral growth .

Vice pigment

• The secondary pigments are collectively called phycochrysin. Due to its large amount of presence, the algae are golden or brown. When organic matter is particularly abundant in the waters, these secondary pigments will be reduced, making the algae appear green.

Storage substances

• Storage substances are white sugar and fat. White sugar, also known as white sugar body, is a bright and opaque sphere, often located at the rear end of the cell.

Cell nucleus

• One nucleus.

Answer 2

☞ Chrysophyta ☜

• Chrysophyta (Chrysophytes) is a major group of algae plants, because the pigment body is golden yellow or yellow brown, and the plant body is golden yellow.

Most species of Chrysophyta live in fresh water. Therefore, Chrysophyta plants occupy an extremely important position in freshwater algae. This studies the classification of freshwater Chlamydomonas plants, including the main morphological characteristics and classification systems of freshwater Chrysophyllum plants.

Through the in-depth study of the research history of Chrysophyta plants and the classification system of freshwater Chrysophyta plants, based on the gold algae plant classification system, combined with the research history and current status of freshwater Chrysophyta plants.

The freshwater Chlamydomonas species classified and described in detail. This answer describes the currently known freshwater Chlamydomonas plants of 5 classes, 7 orders, 15 families, 29 genera, 119 species, namely Chrysophyceae (3 orders, 8 families, 22 genera, 70 species), Includes Chromulinales, Hibberdiales, Hydrurales, Bicosoecophyceae (1 order, 1 family, 1 genus, 1 species), including cysts Order (Bicosoecales), Phaeothamniophyceae (1 order, 1 family, 1 genus, 1 species), including Phaeothamniales, Synurophyceae (1 order, 2 families, 2 genus, 44 species) , Including Synurales, Prymnesiophyceae (1 order, 3 families, 3 genera and 3 species) including Prymnesiales.

Through the study of the structural characteristics and identification methods of siliceous scale-like gold algae plants, in-depth analysis of the siliceous scale-like gold algae plants recorded was carried out, especially the genus Ichthyophyllum that is the most genus of Synurophyceae Plants of the genus (Mallomonas) have been quantitatively classified.

Compared with the quantitative classification method of the closest distance method and the Ward's method, The tree-like results of the two are similar, only the attribution of M. costata and M. portae-ferreae is slightly different.

But compared with traditional classification methods, the results are similar, but there are still some differences in other branches. Combining morphological classification with quantitative classification and molecular biology classification methods.

The distribution is relatively poor. Through the study of the ecological types of freshwater golden algae plants, the ecological types of freshwater golden algae plants are diverse, mainly distributed in ponds, lakes, reservoirs, and mountain stream rapids, and are widely distributed in different nutrient water bodies.

There are also some single-cell and siliceous scale-like gold algae plants, although the number of species is large, but because they rarely grow in large numbers in a certain place, it is difficult for researchers to discover. Many

species have only been reported once.

The main factors affecting the distribution of freshwater Chlamydomonas plants are seasonal factors, water temperature, pH and other environmental factors. Therefore, freshwater Chlamydomonas plants mostly grow in clear waters with high transparency, low temperature and low organic matter content, and are more sensitive to changes in water temperature.

They often grow vigorously in winter, early spring and late autumn. Since Chrysophyta plants have a special ecological range, some species with limited distribution conditions and corresponding ecological environment parameters can be used to monitor water quality and its changes, so it has an important role in indicating the ecological environment.

Especially the siliceous scale algae Chrysophyta, which has different ecological distribution range, can be used as an indicator species of ecological environment, as well as indicator algae of ancient lakes, which provides a basis for the reconstruction of lake history.