How Do Trees Grow in Girth? Controversy on the Role of Cellular Events in the Vascular Cambium
Radial growth has long been a subject of interest in tree biology research. Recent studies have brought a significant change in the understanding of some basic processes characteristic to the vascular cambium, a meristem that produces secondary vascular tissues (phloem and xylem) in woody plants. A...
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| Veröffentlicht in: | Acta biotheoretica 2021-12, Vol.69 (4), p.643-670 |
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| creator | Wilczek-Ponce, Anna Włoch, Wiesław Iqbal, Muhammad |
| description | Radial growth has long been a subject of interest in tree biology research. Recent studies have brought a significant change in the understanding of some basic processes characteristic to the vascular cambium, a meristem that produces secondary vascular tissues (phloem and xylem) in woody plants. A new hypothesis regarding the mechanism of intrusive growth of the cambial initials, which has been ratified by studies of the arrangement of cambial cells, negates the influence of this apical cell growth on the expansion of the cambial circumference. Instead, it suggests that the tip of the elongating cambial initial intrudes between the tangential (periclinal) walls, rather than the radial (anticlinal) walls, of the initial(s) and its(their) derivative(s) lying ahead of the elongating cell tip. The new concept also explains the hitherto obscure mechanism of the cell event called ‘elimination of initials’. This article evaluates these new concepts of the cambial cell dynamics and offers a new interpretation for some curious events occurring in the cambial meristem in relation to the radial growth in woody plants. |
| doi_str_mv | 10.1007/s10441-021-09418-y |
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The new concept also explains the hitherto obscure mechanism of the cell event called ‘elimination of initials’. 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| subjects | Cambium Education Evolutionary Biology Meristems Philosophy Philosophy of Biology Phloem Regular Regular Article Trees Xylem |
| title | How Do Trees Grow in Girth? Controversy on the Role of Cellular Events in the Vascular Cambium |
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