Abstract
The stem elongation responses of etiolated peas (Pisum sativum L.) to fluorescent light (35–45 μmol.mt-2.s-1) were recorded using high resolution position transducers. Continuous fluorescent light decreased growth by 70% within 9 min. The growth rate declined to 5% of the control over the next 2 h and remained at this level for 7 h. Pulses of fluorescent light ranging from 8 s to 34 min led to partial suppression of growth and resulted in a complex kinetic response. The distinctive kinetics of blue and red light inhibition were apparent as components of the responses to non-saturating levels of fluorescent light. The rapid suppression of growth by blue light was not affected by concomitant red light. The lag time for the onset of red light inhibition was not affected by concomitant blue, but the rate of inhibition appeared accelerated.
Similar content being viewed by others
References
Behringer FJ, Davies PJ and Reid JB (1990) Genetic analysis of the role of gibberellin in the red light inhibition of stem elongation in etiolated seedlings. Plant Physiol. 94: 432–439
Bleiss W and Smith H (1985) Rapid suppression of extension growth in dark-grown wheat seedlings by red light. Plant Physiol. 77: 552–555
Cosgrove DJ (1981) Rapid suppresion of growth by blue light. Occurrence, time course, and general characteristics. Plant Physiol. 67: 584–590
Iino M, Briggs W (1984) Growth distribution during first positive phototropic curvature of maize coleoptiles. Plant Cell Environ. 7: 97–104
Ingram TJ, Reid JB, Murfet IC, Gaskin P, Willis CL and MacMIllan J (1984) Internode length in Pisum. The Le gene controls the 3B-hydroxylation of gibberellin A20 to gibberellin A1. Planta 160: 455–463
Laskowski MJ, Briggs WR (1989) Regulation of pea epicotyl elongation by blue light. Fluence-response relationships and growth distribution. Plant Physiol. 89: 293–298
Lockhart JA (1960) Intracellular mechanism of growth inhibition by radiant energy. Plant Physiol. 35: 129–135
Meijer G (1968) Rapid growth inhibition of Gherkin hypocotyls in blue light. Acta. Bot. Neerl. 17: 9–14
Parker K, Baskin TI and Briggs WR (1989) Evidence for a phytochrome-mediated phototropism in etiolated pea seedlings. Plant Physiol 89: 493–497
Ross JJ and Reid JB (1989) internode length in Pisum. Biochemical expression of the le gene in darkness. Physiol. Plant 76: 164–172
Russell DW and Galston AW (1968) Comparative analysis of phytochrome-mediated growth responses in internodes of dwarf and tall pea plants. Planta 78: 1–10
Warpeha KMF, Kaufman LS (1989) Blue-light regulation of epicotyl elongation in Pisum sativum. Plant Physiol. 89: 544–548
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Behringer, F.J., Davies, P.J. The early time course of the inhibition of stem growth of etiolated pea seedlings by fluorescent light. Plant Growth Regul 12, 341–345 (1993). https://doi.org/10.1007/BF00027216
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00027216