Anatomical structure comparison of nutritive organ between fasciated stem soybean and cultivated soybean
The anatomical structures of roots,stems,leaves and petioles of various plant type soybeans were compared by paraffin slice and light microscopy.The results showed that:compared with other types,fasciated stem soybean has some merits contributed to storage and transportation of nutriments and water:including obvious vascular cambium in root endodermis,developed vascular in secondary xylem,big diameter and bacteria nest in cortex;larger stem transection,more siphonopore chain number of vascular bundle and vascular bundle number,long and narrow column type of intermediate myelocyte cells,developed ambient myelocyte cells,big volume,closely spaced.But the factors that make fasciated soybean prone to lodging,low photosynthetic capacity and low seed setting rate factor may be:stem square epidermal cells closely arranged,casparian strip without starch sheath;only two layer palisade tissue in leaf,thinner leaf,sparse sponge tissue;small petiole transection.In addition,new line 94-2-3-1,namely offspring of fasciated stem soybean,has parental genetic characteristics,big and developed vascular diameter of secondary xylem,and free cortical cell,with cell gap,be helpful for gas storage and enhancing drought resistance,satisfying oxygen supply.Jiyu 67 had three layers palisade tissue.The spongy tissue,palisade tissue and the leaf were thicker than the fasciated stem soybean.All these structure features were beneficial to photosynthesis.The suberinized exodermis of Jiyu 67 was well developed,and protected the plant effectively.
NETL
NSTL
万方数据
维普
