Developmental changes in cell wall of bundle sheath fibers close to phloem of Fargesia yunnanensis

摘要

The developmental changes of fiber wall in the bundle sheathes close to phloem of Fargesia yunnanensis including wall thickness and number of cell wall layers from 0.5 months of bamboo shoots emerged from the ground to 36 months old were investigated. The study revealed that culms of E yunnanensis have two types of vascular bundles and the fibers adjacent to the phloem developed earlier than other fibers. There are two obviously developmental stages in fiber wall thickening during the first growth year. Six fiber wall types could be distinguished in the bundle sheath fibers close to phloem of 36 months old culms and lots of fibers with relatively big lumina at the periphery still could be observed. Two main deposition ways could be found in the developmental phase of bundle sheath fibers close to phloem.