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The influence of paclobutrazol on the distribution and utilization of 14C-labelled assimilate fixed at anthesis in oil-seed rape (Brassica napus L.)

Published online by Cambridge University Press:  27 March 2009

A. A. Addo-Quaye ,
R. W. Daniels  and
D. H. Scarisbrick
A. A. Addo-Quaye
Affiliation:
Wye College (University of London), Ashford, Kent, TN25 5AH
R. W. Daniels
Affiliation:
Wye College (University of London), Ashford, Kent, TN25 5AH
D. H. Scarisbrick
Affiliation:
Wye College (University of London), Ashford, Kent, TN25 5AH
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Summary

Untreated and paclobutrazol-treated field-grown plants of winter oil-seed rape cv. Jet Neuf were exposed to 14CO2 at anthesis. Redistribution of labelled assimilate was followed in sequential harvests between exposure and maturity.

Labelled assimilates moved progressively from the leaves into the stem and reproductive parts. At maturity 9% of 14C fixed at anthesis had been mobilized into reproductive organs. Paclobutrazol increased the proportion of 14C translocated to the uppermost branches especially the terminal raceme.

It is suggested that stem reserves are valuable for yields commonly achieved in U.K. commercial practice.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 105 , Issue 2 , October 1985 , pp. 365 - 373
Copyright
Copyright © Cambridge University Press 1985

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References

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