Persistent effects of changes in phytochrome status on internode growth in light-grown mustard: Occurrence, kinetics and locus of perception
- 1 August 1988
- journal article
- research article
- Published by Springer Nature in Planta
- Vol. 175 (2), 214-220
- https://doi.org/10.1007/bf00392430
Abstract
Extension growth of the first internode in fully de-etiolated mustard (Sinapis alba L.) seedlings (11–12.5 d old) is under the control of both the current phytochrome photoequilibrium (Pfr/P, ratio of the far-red-absorbing form of phytochrome to total phytochrome) and that established by short (pretreatments. Plants were pretreated with either light pulses providing different calculated Pfr/P followed by dark incubations of different durations (a), or with a 12-h period of white light establishing different Pfr/P (b). After the pretreatments, the plants received either light pulses providing different Pfr/P, followed by dark incubations (c), or continuous white light with or without addtional far-red light (d). Thus, four experimental approaches were followed: (a)→(c); (a)→(d); (b)→(c) and (b)→(d). Extension growth during the second period (c or d) was not only affected by the current phytochrome status, but also by that established during the pretreatment period (a or b). The results show the existence of a long-term promotion of stem growth which persists after the end of the low Pfr/P pretreatment. This effect is different from the previously reported rapid effect of far-red light added to background white light as follows: (i) the duration of low Pfr/P required to effect a full response is longer (2.5 h); (ii) the duration of the promotion after returning to high Pfr/P is longer (approx. 24 h) and (iii) the locus of perception is mainly in the leaves, rather than the growing internode.This publication has 15 references indexed in Scilit:
- Early detection of neighbour plants by phytochrome perception of spectral changes in reflected sunlightPlant, Cell & Environment, 1987
- The effect of plant density on tillering: The involvement of R/FR ratio and the proportion of radiation intercepted per plantEnvironmental and Experimental Botany, 1986
- Tillering Responses to Enrichment of Red Light Beneath the Canopy in a Humid Natural GrasslandJournal of Applied Ecology, 1985
- CONTROL OF HYPOCOTYL GROWTH IN MUSTARD SEEDLINGS AFTER LIGHT‐DARK TRANSITIONSPhotochemistry and Photobiology, 1984
- Evidence that Pfr is not the active form of phytochrome in light-grown maizeNature, 1981
- Action Spectra for the Inhibition of Hypocotyl Growth by Continuous Irradiation in Light and Dark-Grown Sinapis alba L. SeedlingsPlant Physiology, 1980
- Rapid photomodulation of stem extension in light-grownSinapis alba L.Planta, 1980
- Phytochrome and internode elongation in Chenopodium polyspermum L. sites of photoreceptionPlanta, 1979
- THE FUNCTION OF PHYTOCHROME IN THE NATURAL ENVIRONMENT—II. THE INFLUENCE OF VEGETATION CANOPIES ON THE SPECTRAL ENERGY DISTRIBUTION OF NATURAL DAYLIGHTPhotochemistry and Photobiology, 1977
- The role of the cotyledons in the photocontrol of hypocotyl extension in Cucumis sativus L.Planta, 1974