Anatomical Structure of Root and Root Nodule of Alnus sibirica-Host o fBoschniakia rosica

ＡｎａｔｏｍｉｃａｌＳｔｒｕｃｔｕｒｅｏｆＲｏｏｔａｎｄＲｏｏｔＮｏｄｕｌｅｏｆＡｌｎｕｓｓｉｂｉｒｉｃａ－ＨｏｓｔｏｆＢｏｓｃｈｎｉａｋｉａｒｏｓｉｃａＨｕＢａｏｚｈｏｎｇ，ＬｉＪｉｎｇ，ＧｕｉＭｉｎｇｚｈｕ，ＬｉＧｕｉｑｉｎａｎｄＸｕＬｉｊｕｎ（...

Anatomical Structure of Root and Root Nodule of Alnus sibirica-Host of Boschniakia rossica

The root of Alnus sibirica is rich in tissue type. Phloem fibers are obvious and Plasmodesmas are well developed. The number of primary xylem bunches are not stable, there are triarch, tetrarch and pentarch types. The perforation plate of vessel is scalariform. The rays types are radial in shape and unicellular in structure. In root nodule, cortex is the best developed structure, the stele is small. The root nodule is branched. In root nodule tissues, actinomyces proliferate luxuriently, the actinomyces body is in different shapes.