| Autor: |
Savidge RA; Department of Botany and Microbiology, University College of Wales, SY23 3DA, Aberystwyth, Dyfed, U.K.., Wareing PF |
| Jazyk: |
angličtina |
| Zdroj: |
Planta [Planta] 1981 Dec; Vol. 153 (5), pp. 395-404. |
| DOI: |
10.1007/BF00394977 |
| Abstrakt: |
Exogenous indol-3yl-acetic acid (IAA), alone and together with several cytokinins, was ineffective in promoting the complete differentiation into tracheids of cambial derivatives of Pinus contorta Dougl.; IAA alone promoted cambial cell division and primary-wall growth in cambial derivatives throughout the stem's length. In contrast, a single pair of needles on a stem cutting in light promoted neither cambial cell division nor primary-wall growth in cambial derivatives but did promote complete differentiation of cambial cells into tracheids; tracheids differentiated only near the junction of the foliated short shoot with the stem. Clear inter-and intracellular differences in the extent of tracheid differentiation occurred in response to a single needle pair and have suggested the hypothesis that a specific tracheid-differentiation factor regulates the differentiation of cells into proto-, meta-, or secondary-xylem tracheary elements through an interaction with IAA. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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