Origin and development of primary vascular tissues in seed plants
Identifieur interne : 002F87 ( Main/Exploration ); précédent : 002F86; suivant : 002F88Origin and development of primary vascular tissues in seed plants
Auteurs : Katherine Esau [États-Unis]Source :
- The Botanical Review [ 0006-8101 ] ; 1943-03-01.
Abstract
Conclusion: In conclusion it seems appropriate to indicate some of the basic concepts that have determined the writer’s approach in the present evaluation of terms, concepts and interpretations. Morphological categories and terms are tools that we need to describe our observations. If these terms and categories are conceived narrowly and on the basis of a static picture of plant structure, and if, in addition, they are used injudiciously, they become obstructions that stand between us and the facts revealed by pure observation. At their best, terms and categories are inadequate to express fully the common tendency of living organisms to intergrade in structure and function with other related organisms and to produce, within themselves, transitional types between the different categories of cells, tissues or organs. But we need these tools, we require a language to describe our observations, and we wish this language to be uniform and clearly understood. In view of the nature of the subject, our concepts, terms and categories must be conceived broadly and with an emphasis on the dynamic aspects of the organization of plants. Living organisms are not conglomerations of separable parts, they are not merely cell networks, but are aggregations of living elements intimately associated with other elements adjacent to them in time and space.
Url:
DOI: 10.1007/BF02872466
Affiliations:
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