PJB-1973-9
ANATOMY OF REGENERATING ROOT SEGMENTS OF TARAXACUM OFF ICINALE WEB.
MOHAMMAD ISHAQUE KHAN
Abstract
A detailed study of the anatomy of proximal and distal ends of
regenerating Taraxacum
officinale root cutting was undertaken. It was found that cell division began
just below the cut ends of the root
segments after 24 hr. of regeneration. At the proximal end, shoot meristems
were distinguished at 48 hr. in a
narrow zone around the xylem core. Later on callus growth followed, carrying the new shoots upwards. Xyle n. strands differentiated basipetally through the secondary phloem at seventh day. At the distal end, xylem nodule appeared at the fourth day of regeneration in a wide zone across the secondary phloem. Callus growth followed later and meiistem appeared in the callus, distal to the xylem nodule, after two weeks. The young shoot and root meristem had identjcal appearance.
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