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Induction of tension wood by 2,4-dinitrophenol and auxins

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Summary

The effect of DNP and auxins on the development of the secondary xylem in erect stems ofAcer rubrum was studied. DNP affected the development of the secondary xylem only locally in the treated internode. Tension wood is formed in the stem below the DNP treatment site whereas above the application site the development of tracheary elements is altered. InAcer rubrum seedlings that were treated with auxin, especially at low concentrations, a thick ring of tension wood is developed in the erect stem below the treatment site. Previous suggestions that the formation of tension wood in arborescent angiosperms is a developmental response to auxin deficiency are discussed in terms of the induction of tension wood inAcer rubrum by DNP and auxins.

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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-dichlorophenoxyacetic acid)

DNP:

(2,4-dinitrophenol)

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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Morey, P.R., Cronshaw, J. Induction of tension wood by 2,4-dinitrophenol and auxins. Protoplasma 65, 393–405 (1968). https://doi.org/10.1007/BF01666299

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