Photoperiodic Control of Apical Senescence in a Genetic Line of Peas
- 1 December 1976
- journal article
- research article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 58 (6), 800-802
- https://doi.org/10.1104/pp.58.6.800
Abstract
An early flowering genetic line of peas (Pisum sativum L.), designated G2, has dominant genes at 2 different loci, both of which function in short days to greatly extend the reproductive phase and thus to delay apical senescence. Long days (18 h) promote senescence in this line, but the effect is reversible by reinstatement of short days (9 h) until 3-4 days before the apex senesces. The response to photoperiod was quantitative. Increasing the photoperiod from 14-18 h 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.This publication has 4 references indexed in Scilit:
- Control of Senescence in Marchantia by PhytochromePlant Physiology, 1971
- Photoperiodic Induction of Senescence in Xanthium PlantsScience, 1966
- Fruit-induced & apical senescence in Pisum sativum L.Plant Physiology, 1961
- Experimental Modification of Plant Senescence.Plant Physiology, 1959