The red substance deposited in phellogen cell wall of the roots was proved to be non-crystal organic and inorganic substance composed of Fe, Al, etc. 病根周皮木栓层细胞壁积聚的红色物质为Fe、Al等元素组成的非晶态有机无机复合物。
Secondly, It may effected the normal formation of phellogen and the mitosis of cambium in stem, as well as the normal development of phloem fibers. 其次,缺钾可能影响茎中木栓形成层的正常发生,以及影响维管形成层的细胞分裂活动,并可能干扰韧皮部纤维的正常发育。
The main cause of root tuber expanding is that phellogen produces many layers of phelloderm parenchyma cells and vascular cambium produces a lot of secondary vascular tissue that consists of parenchyma. 但在以后的发育过程中,木栓形成层产生了多层栓内层薄壁细胞,维管形成层则产生了大量高度薄壁组织化的次生维管组织,从而形成了肉质膨大的块根。