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Annals of Botany 72: 133-142, 1993
© 1993 Annals of Botany Company

Time of Flowering of Pea (Pisum sativum L.) as a Function of Leaf Appearance Rate and Node of First Flower

H. H. Truong and C. Duthion

INTRA, Station d'Agronomie, 17 rue Sully, 21034 Dijon Cedex, France

In order to assess the influence of environmental conditions on time of flowering of pea (Pisum sativum L.), a serial sowing trial was conducted over 2 years at Dijon, France, on two winter cultivars Frisson and Frilene. Time of flowering was analysed according to two variables: the leaf appearance rate RL and the node of first flower NI.

RL was linearly related to temperature (r2 = 0·94). The base temperature was 2°C for both varieties. Growth rate accounted for the residual variability of RL . Photoperiod and temperature acted on NI in an additive way. Frilene, the later genotype, was more responsive than Frisson.

A model for predicting time of flowering based upon these results is proposed. Deviations from this model were related to N nutrition in interaction with the plant water relations. Steps for improving the model are then discussed.Copyright 1993, 1999 Academic Press

Pisum sativum L., pea, flowering, temperature, photoperiod, phyllochron, model


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