Changbai Mountain Pollen

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Seed plant-specific structure, the equivalent of a small spores and by its early stage of development of male gametophyte. In mature pollen of angiosperms contains two or three cells, namely, a vegetative cell and a division of reproductive cells or generated by two sperm. Pollen grains in the two cells, the two sperm in the pollen tube after pollination by the formation of the reproductive cell division. In the mature pollen of Gymnosperms change in the number of cells contained large, from 1 to 5 or more cells, of which 1 to 2 of the original leaf cells, is the male gametophyte in the remaining few vegetative cell, after the formation of are then degraded in the male gametophyte of angiosperms has been completely disappear. Morphological types of pollen varies. According to pollen shape and size, symmetry and polarity, germination the number of holes, structure and location, wall structure and surface carving patterns, etc. can often be identified to the families and genera and even identify the species of plants. Pollen morphology and pollen for taxonomic identification of fossil pollen analysis provide the basis for identification, but also for plant phylogenetic studies provide valuable information. The majority of mature pollen dispersion, a single grain of pollen. But there are two or more pollen bonded together, known as compound pollen. Many pollen together, in a drug room, there are at least two or more, known as pollen pockets. One or several drugs in the room all the pollen grains bonded together, known as pollen block. Small pieces of pollen and pollen mainly seen in the Orchidaceae and Asclepiadaceae plants. Pollen grains in tetrads Some of North Korea, known as near-polar surface. Known as the distal part of the outward surface. Connect pollen proximal face nodes and distant polar center of an imaginary line, called the polar axis, with the polar axis intersecting at right angles to a line known as the equatorial axis, along the center line of the surface of pollen between the two poles of the equator. In a polar pollen can be divided into other pole, Asia, and a very different type of pole 3. Pollen is usually symmetrical, there are two different kinds of symmetry: radial symmetry, and symmetrical. Pollen mostly spherical, equatorial axis longer than the polar axis, known as the flat spherical; in particular, known as the super-bian bian spherical; the contrary, the polar axis is longer than the equatorial axis is called a long ball, in particular, long known as the long ball. Pollen in polar view profile seen in the equator, can be round in shape, with angular, with cracked sheet and so on. In equatorial view, pollen profile can be rounded, oval, diamond, square and so on. Pollen size varies by species, vary greatly. Boraginaceae pollen found in the smallest of the forget-me-about (4 ~ 8) μm × (2 ~ 4) microns. Large pollen diameter of 100 ~ 200 micron 〔〕 Zingiber, 120 ~ 150 micron 〔Malvaceae many of the species, as well as cows, banana is so〕. Most of the pollen maximum diameter of about 20 to 50 microns. Pollen of aquatic plants Zosteraceae slender, about (1200 ~ 2900) μm × (3.5 ~ 9.5) micron. Pollen germination hole wall thinning regions, pollen germination pollen tube is often extended by the germination of holes. Kong in accordance with their length and width of germination percentage, usually divided into ditch, hole types. Where the length and width ratio greater than 2 for the groove, less than 2 for the hole. Short-and long-hole groove is sometimes difficult to distinguish between. Only a ditch or hole for a simple germination of holes, trenches and holes for the compound composed of germination hole. Germination pore size distribution in the polar surface, equatorial surface or dispersed in the sphere. Distributed in the distal surface of a single groove, also known as slots. Germination Kong there are many variations, there are no holes in pollen germination. Pollen wall is usually divided into two layers, namely, outer wall and inner wall. Wall mainly composed of pectin, cellulose, are less resistant, in the surface perishable, after dealing with the decomposition of acid-base; while the outer wall is the main component of sporopollenin, anti-corrosion and anti-acid-base properties of strong, in the strata, through 1000 remain intact for millions of years, the study of pollen morphology, based mainly on the outer wall structure. The outer wall also can be divided into two layers, namely, the outer and inner. Outer layers are generally composed of three layers, the outermost layer of the cover layer, on which, or a perforation, development is not complete when the cover layer for a semi-or non-coverage layer of pollen. The following is a layer of columnar layer, with a columnar (or rod-like) structure. And then a layer of grass-roots following. Pollen surface is smooth or with a variety of decoration (carving patterns). The type of decoration varies by species. The main carving patterns are granular, nodular, sticks like, thorn-like, stripe-like, crisped, mesh, brain wrinkle-like and so on.

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Jingyu County Shanjian Specialty Co., Ltd

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