An overview of plant structure and development

Charles B. Beck

doi:10.1017/CBO9781139165365.003

Chapter 2 - An overview of plant structure and development

Published online by Cambridge University Press: 05 June 2012

Charles B. Beck

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Charles B. Beck: Affiliation:
University of Michigan, Ann Arbor

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Perspective: origin of multicellularity

Since early in the study of plants botanists have been interested in the structure, function, development, and evolution of cells, tissues, and organs. Because some green plants are very small and unicellular, but others are large and multicellular, the origin of multicellularity in plants also has been of great interest to botanists. Among the green algae from which higher plants are thought to have evolved, some colonial taxa such as Pandorina, Volvox, and relatives consist of aggregations of motile cells that individually appear identical to apparently related unicellular forms (Fig. 2.1). Consequently, it was concluded early in the history of botany, and widely accepted, that multicellular plants evolved by the aggregation of unicellular organisms. This viewpoint led to the establishment of the cell theory of multicellularity in plants which proposes that cells are the building blocks of multicellular plants (Fig. 2.2). As early as 1867, however, Hoffmeister proposed that cells are simply subdivisions within an organism. This viewpoint, supported and expanded upon in 1906 by Lester Sharp at Cornell University, has been elucidated and clarified more recently by Hagemann (1982), Kaplan (1992), and Wojtaszek (2000) among others.

Type: Chapter
Information: An Introduction to Plant Structure and Development
Plant Anatomy for the Twenty-First Century
, pp. 8 - 37

DOI: https://doi.org/10.1017/CBO9781139165365.003 [Opens in a new window]

Publisher: Cambridge University Press

Print publication year: 2005

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