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The Effect of Photoperiod on the Reproductive Development of a Photoperiod Sensitive Groundnut (Arachis hypogaea L.) Cv. NC Ac 17090

Published online by Cambridge University Press:  03 October 2008

Marie-Luise Flohr ,
J. H. Williams  and
F. Lenz
Marie-Luise Flohr
Affiliation:
Institut Fuer Obstbau und Gemuesebau, University of Bonn, Auf dem Huege1 6, 5300 Bonn, West Germany
J. H. Williams
Affiliation:
ICRISAT Sahelian Centre, BP 12404, Niamey, Niger
F. Lenz
Affiliation:
Institut Fuer Obstbau und Gemuesebau, University of Bonn, Auf dem Huege1 6, 5300 Bonn, West Germany
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Summary

The physiological basis for responses to daylength of a photoperiod sensitive groundnut genotype (NC Ac 17090) was investigated by comparing its growth and development in natural daylength with that in an artificially manipulated photoperiod in three field experiments. Photoperiod did not influence the thermal time to flowering, or the subsequent appearance of flowers until 900–950 flowers m−2 had appeared. Thereafter flowers continued to appear in short, but not in long, days. In each experiment, long days increased the thermal time between the initiation of each peg and pod, and the thermal time required for each fruit to mature. These fruit initiation and developmental changes were reflected in the partitioning of assimilates to pods, this being substantially less in long days than in short. Changes in pod initiation rate, partitioning co-efficient, and the thermal time taken for a pod to mature were related to mean daylength.

Type
Research Article
Information
Experimental Agriculture , Volume 26 , Issue 4 , October 1990 , pp. 397 - 406
Copyright
Copyright © Cambridge University Press 1990

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References

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