Abstract
Senescence of leaf tissue and attached leaves can be inhibited by all of the three major groups of higher plant growth hormones. Leaf senescence can also be promoted by ethylene and abscisic acid. Which hormones are active in a given case seems to be primarily determined by the species used, although some evidence indicates this may be an oversimplification (e.g. Aspinall, et al., 1967; Goldthwaite and Laetsch, 1968). Previous work (Whyte and Luckwill, 1966; Goldthwaite and Laetsch, 1968) showed that net breakdown of chlorophyll and protein in excised leaf tissue of Rumex spp., is strongly inhibited by very low concentrations of gibberellic acid (GA3). Also described were several aspects of the behavior of the Rumex system including time courses of chlorophyll and protein loss, reversibility of the GA3 effect and activity of the cytokinin 6-benzylaminopurine (BAP). This report describes experiments carried out to further our understanding of hormone-controlled senescence in this plant. Included are studies of the effect of GA3 and BAP on senescence induced in attached leaves and the effect of other growth-regulators and combined applications of GA3 and cytokinins to excised leaf discs.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
ASPINALL, D., L.G. PALEG and F.T. ADDICOTT (1967). Abscisin II and some hormone-regulated plant responses. Aust. J. Biol. Sci. 20, 869–882.
BACK, A. and A.E. RICHMOND (1969). An interaction between the effects of kinetin and gibberellin in retarding leaf senescence. Physiol. Plant. 22, 1207–16.
BACK, A. and A.E. RICHMOND (1971). Interrelations between gibberellic acid, cytokinins and abscisic acid in retarding leaf senescence. Physiol. Plant. 24, 76–9.
BEEVERS, L. (1968). Growth regulator control of senescence in leaf discs of nasturtium (Tropaeoium majus), in “Biochemistry and Physiology of Plant Growth Substances” (Eds. F. Wightman and G. Setterfield). The Runge Press Ltd., Ottawa. 1960.
CHIN, T. and L. BEEVERS (1970). Changes in endogenous growth regulators in nasturtium leaves during senescence. Planta 92, 178–88.
EL-ANTABLY, H.M.M., P.F. WAREING and J. HILLMAN (1967). Some physiological responses to D, L-Abscisin (Dormin). Planta 73, 74–90.
FLETCHER, R.A., T. OEGEMA, and R.F. HORTON (1969). Endogenous gibberellin levels and senescence in Taraxacum officinale. Planta 86, 98–102.
FLETCHER, R.A. and D.J. OSBORNE (1966). A simple bioassay for gibberellic acid. Nature 211 743–4.
GOLDTHWAITE, J.J. (1968). “Experimental investigations of leaf tissue senescence”. Thesis, University of California, Berkeley.
GOLDTHWAITE, J.J. and L. BOGORAD (1971). A one-step method for the isolation and determination of leaf ribulose-1,5-diphosphate carboxylase. Anal. Biochem. 41, 57–66.
GOLDTHWAITE, J.J. and W.M. LAETSCH (1967). Regulation of senescence in bean leaf discs by light and chemical growth regulators. Plant Physiol. 42, 1757–62.
GOLDTHWAITE, J.J. and W.M. LAETSCH (1968). Control of senescence in Rumex leaf discs by gibberellic acid. Plant Physiol. 43, 1855–8.
HARDWICK, K., M. WOOD, and H.W. WOOLHOUSE (1968). Photosynthesis and respiration in relation to leaf age in Perilla frutescens. (L.) Britt. New Riytol. 67, 79–86.
KIRK, J.T.O. and R.A.E. TILNEY-BASSETT (1967). “The Plastids”. W.H. Freeman and Company, London.
REYNOLDS, T. (1969). Senescence retardation in dock leaves by soluble peptone. Nature 223, 505–6.
WHYTE, P. and L.C. LUCKWILL (1966). A sensitive bioassay for gibberellins based on retardation of leaf senescence in Rumex obtusifolius. Nature 210, 1360.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1972 Springer-Verlag Berlin · Heidelberg
About this paper
Cite this paper
Goldthwaite, J. (1972). Further Stuides of Hormone-Regulated Senescence in Rumex Leaf Tissue. In: Carr, D.J. (eds) Plant Growth Substances 1970. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-65406-0_76
Download citation
DOI: https://doi.org/10.1007/978-3-642-65406-0_76
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-65408-4
Online ISBN: 978-3-642-65406-0
eBook Packages: Springer Book Archive