Northeast 10 Wild Soybean (glycine Soja) Salt Structure Evolution

Ten wild soybeans were studied by paraffin slice and light microscopy in order to explore the salt resistant structure characteristics and elucidate the regularity of the structural evolution.The seeds of these experimental materials were picked up from the different areas with saline-alkali soil. And then they were cultivated in the neutral soil. The aim of the experiment was to find the stable and inheritable salt resistant structures, and study the relationship between plant structures and its environment. The study can be helpful for the future screening of salt resistant soybean breeds.Comparing with the anatomical structures of ten wild soybeans, it can be said : The first, the salt resistant structural characteristics of wild soybeans were defined. The typical characteristics were salt glands, saline vacuole bags, crystal and so on. Moreover, there were some other structures that had not direct relationship with salt resistant function, but they enhanced the tolerance of the plant through increasing the abilities of assimilating, transporting and sustaining.The second, some common salt resistant structure characteristics existed in all these materials, such as the saline vacuole bags. But some special characteristics only existed in some of all, such as the salt glands, only existing in 625,627,630. Each one had some salt resistant ability, but the ability was different among them. The third, the salt resistant ability was related to synthetic effect of many salt resistant structures, but not only one. The fourth, from all aspects, 627 had more salt resistant characteristics.The fifth, a special structure was found. The secondary structures of the root wrapped the primary structures of the stem. It perhaps resulted from the function of the extra cambium.