Coastal Halophyte Plant Resources In Hebei Province And Its Salt Structure

Hylophytes in Hebei province have altogether 91 species, 62 genera, 25 families, Within the range of Hebei province, halophytic vegetation flora is temperate . There is no special phenomenon.For the special surroundings,most of them live along the seaside.The halophytes have high economic values. 14 species are edible plants, 37 species are medicinal plants,11 species are ornamental plants and31 species are feeding plants,The major types of halophytic vegetation in Hebei province include ptenothalophyta such as Tamarix chinensis brush and Siberian brush, and littoral halophytic vegetation such as succulent vegetation, poion, chomophyte and etc.Epidermal cell exosporium of Tamarix chinensis blade is papillous and capillaceous; stoma and salt-secreting gland are under the epidermis; differentiation level of mesophyll tissue is rather high; porder camber is obvious; and mechanical tissue is developed. Most of callow stirpes are developed into assimilative branches. There is a thick layer of palisade tissue under the epidermis.There are many secretory salt particles on the blade epidermis of Siberian , epidermal hair and stoma are irregular, stoma is at the same level of epidermal cell, or even protruding. There are 2-3 layers of long-column-shaped palisade tissue under the upper epidermis, and there are a great number of mechanical tissues which made up of vascular bundle sheath . Vascular bundle of Siberian callow stirpes are disposed in 2-round and alternative order. Thin-walled cells of cortex and pulp are rich in rhaphides.White star and scale-shaped hair is dense on the surface of Elaeagnus angusti folia' s leaf, and stoma distribution is mostly irregular. Bifacial leaf and mesophyll tissuecontain crystals, phloem is rich in saliferous vacuoles, and the mechanical tissue isdeveloped. Thin-walled cells of callow stirpe's cortex contain saliferous vacuoles, and pulpcells contain crystals.There are few villous pe-la stomas, and they sink. Palisade tissue is rich in saliferous vacuoles, while vascular bundle sheath is obvious.