Summary
In horizontally placedAcer rubrum seedlings the development of tension wood is inhibited by auxin especially when applied along the upper side of the axis. Treatment separately with GA and K does not alter the normal pattern of tension wood formation. The development of tension wood appears to be correlated with a reduced auxin level on the upper side of the stem.
Geotropic reorientation of the woody stem ofAcer rubrum seedlings that are placed in the horizontal position is related closely to the amount of tension wood that is formed on the upper side of the axis. Evidence is discussed which indicates that tension wood itself participates actively in the reorientation mechanism.
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Abbreviations
- TIBA:
-
(2,3,5-tri-iodobenzoic acid)
- IAA:
-
(indole-3-acetic acid)
- GA:
-
(gibberellic acid)
- NAA:
-
(naphthaleneacetic acid)
- 2,4-D:
-
(2,4-dichloro-phenoxyacetic acid)
- K:
-
(kinetin)
References
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This material was included in a doctoral thesis submitted by P. R.Morey to the graduate school of Yale University, New Haven.
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Cronshaw, J., Morey, P.R. The effect of plant growth substances on the development of tension wood in horizontally inclined stems ofAcer rubrum seedlings. Protoplasma 65, 379–391 (1968). https://doi.org/10.1007/BF01666298
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DOI: https://doi.org/10.1007/BF01666298