Summary
Through the development of the electron microscope and the introduction of new microchemical and physiological techniques the past decade has seen a great advance in our knowledge of the primary cell wall. The microfibrillar structure of the epidermal and root-hair cell wall is well established. Calcium forms an integral constituent of the root-hair wall and its antagonism to H-ions and its interaction with auxin is well known. If somewhat conflicting opinions concerning the mechanism of root-hair development and root-hair growth have been advanced, it is not surprising in a field of investigation that involves the functioning of the living protoplasm and its various enzyme systems.
However, when the intensive studies of the physiological changes which prepare epidermal cells for their morphological maturation are extended to those which lead directly to root-hair protrusion, many of the apparent divergences will be clarified.
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Supplement to article in the Botanical Review15: 583–612, 1949.
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Cormack, R.G.H. Development of root hairs in angiosperms. II. Bot. Rev 28, 446–464 (1962). https://doi.org/10.1007/BF02868690
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DOI: https://doi.org/10.1007/BF02868690