Photoperiodic Control of Apical Senescence in a Genetic Line of Peas 1

AUTOR(ES)

Proebsting, William M.

RESUMO

An early flowering genetic line of peas (Pisum sativum L.), designated G2, has dominant genes at two different loci, both of which function in short days to greatly extend the reproductive phase and thus to delay apical senescence. Long days (18 hours) promote senescence in this line, but the effect is reversible by reinstatement of short days (9 hours) until 3 to 4 days before the apex senesces. The response to photoperiod was quantitative. Increasing the photoperiod from 14 to 18 hours led to a progressive decrease in the number of nodes formed prior to death of the apex. Induction of senescence was determined by the total number of hours of light and darkness rather than by the length of the dark period. Senescence required flower and fruit development as well as long days.

Documentos Relacionados

• Photoperiodic and Genetic Control of Carbon Partitioning in Peas and Its Relationship to Apical Senescence 1
• The Control of Apical Bud Growth and Senescence by Auxin and Gibberellin in Genetic Lines of Peas.
• Photoperiodic Control of Gibberellin Metabolism in Spinach 1
• Senescence of Cotyledons of Germinating Peas. Influence of Axis Tissue 123
• Control of the Formation of Amylases and Proteases in the Cotyledons of Germinating Peas 1