J Integr Plant Biol. ›› 1965, Vol. 13 ›› Issue (1): -.

• Research Articles •    

The Structure of the Shoot Apex of Glyptostrobus pensilis Koch

C. H. Yu and T. L. Chen   

Abstract: 1. A series of studies on the structure of the shoot apices in various genera of the Taxodiaceae, except Glyptostrobus was carried out by Cross (1939, 1941, 1942, 1943a, b). In the last two pieces of his above mentioned works, he repeatedly suggested that there was a basic structure pattern which characterized the family. Results obtained from the present investigation lend support to this view. 2. From a comparative point of view concerning the structure of the apical meristem, it may be said that the family Taxodiaceae is a very natural one, any attempt on subdividing it into several separate families, as Hayata (1932) did, seems to be unnecessary. 3. It is very interesting to note that the cellular pattern of the Glyptostrobus shows more affinity with that of the sequoias than with that of Taxodium. Whereas the structures of the apices of Taxoclium and Metasequoia possess more similarities. 4. Cross (1942) proposed that an entirely discrete surface layer might be evolved in the apical meristem of the Taxodiaceae as a result of a gradual diminution and ultimate loss of the periclinal divisions in the outer cells of the shoot apex. In his subsequent papers (1943a, b), more evidence were added in this respect. The present observation is in accord with Cross' findings.

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