Abstract
The ultrastructure of root cap cells of cultured roots of Convolvulus arvensis L. was studied in order to relate sequential changes in the fine structure with known changes in morphology and physiology determined earlier by light microscopy and autoradiography. The rapid structural changes observed in columella cells formed from the root cap initials distal to the quiescent center can be related to the function of these cells as sensors of geotropic stimuli. Even more rapid structural changes in cells of the root cap periphery can be ascribed a functional role in protecting the columella and initial cells as the root is displaced through the soil. Mechanisms are discussed whereby cell division and differentiation in the root apex may be controlled by hormones in the apex.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
