Skip to main content
SpringerLink
Log in

Soluble metabolites in intercellular regions of squash hypocotyl tissues: Implications for exudation

  • Published:
Plant and Soil Aims and scope Submit manuscript

Summary

Amino acids, organic acids, and sugars make up the bulk of 14C-assimilates that leach from freshly excised sections of subterranean hypocotyls of squash plants allowed to fix 14CO2 photosynthetically. Based on kinetics of leakage, it appears that metabolites are present in significant levels in intercellular regions of squash hypocotyls and that they may be the major source of hypocotyl exudates. Although the anatomical relations of epidermal cells hinder excessive metabolite losses by subterranean portions of hypocotyls, avenues of diffusion are continuous along cell walls and middle lamellae between cortical tissue and the hypocotyl surface. re]19751115

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. Baker, K. F., The U.C. system for producing healthy container-grown plants. Univ. Calif. Agric. Exp. Stn. Serv. Manual 23 (1957).

  2. Glasziou K. T. and Gayler K. R., Sugar accumulation in sugarcane: role of cell walls in sucrose transport. Plant Physiol. 49, 912–913 (1972).

    CAS  Google Scholar 

  3. Geiger D. R., Sovonick S. A., Shock T. L. and Fellows R. J., Role of free space in translocation in sugar beet. Plant Physiol. 54, 892–898 (1974).

    CAS  Google Scholar 

  4. Hancock J. G., Effect of infection by Hypomyces solani f. sp. cucurbitae on apparent free space, cell membrane permeability, and respiration of squash hypocotyls. Plant Physiol. 43, 1666–1672 (1968).

    CAS  Google Scholar 

  5. Hancock J. G., Influence of Hypomyces infection and excision on amino acid and 3-O-methylglucose uptake by squash hypocotyls. Physiol. Plant Pathol. 6, 65–73 (1975).

    CAS  Google Scholar 

  6. Hawker J. S., The sugar content of cell walls and intercellular spaces in sugar cane stems and its relation to sugar transport. Aust. J. Biol. Sci. 18, 959–969 (1965).

    CAS  Google Scholar 

  7. Lewis D. H. and Harley J. L., Carbohydrate physiology of mycorrhizal roots of beech. III. Movement of sugars between host and fungus. New Phytol. 64, 256–269 (1965).

    CAS  Google Scholar 

  8. Macklon A. E. S., Cortical cell fluxes and transport to the stele in excised root segments of Allium cepa L. II. Calcium. Planta 122, 131–141 (1975).

    CAS  Google Scholar 

  9. Magyarosy A. C. and Hancock J. G., Association of virus-induced changes in laimosphere microflora and hypocotyl exudation with protection to Fusarium stem rot. Phytopathology 64, 994–1000 (1974).

    CAS  Google Scholar 

  10. Meneley J. C. and Stanghellini M. E., Detection of enteric bacteria within locular tissue of healthy cucumbers. J. Food Sci. 39, 1267–1268 (1974).

    Google Scholar 

  11. Morgan J. V. and Tukey H. B.Jr., Characterization of leachate from plant foliage. Plant Physiol. 39, 590–593 (1964).

    CAS  Google Scholar 

  12. O'Rourke C. J., and Millar R. L., Root rot and root microflora of alfalfa as affected by potassium nutrition, frequency of cutting, and leaf infection. Phytopathology 56, 1040–1046 (1966).

    Google Scholar 

  13. Peel A. J., Transport of Nutrients in Plants, John Wiley & Sons, New York, 258 p. (1974).

    Google Scholar 

  14. Rovira A. D., Plant root exudates and their influence upon soil microorganisms,, p. 170. In Ecology of Soil-Borne Plant Pathogens. Edited by K. F.Baker and W. C.Snyder, Univ. Calif. Press, Berkeley (1965).

    Google Scholar 

  15. Schroth M. N. and Hildebrand D. C., Influence of plant exudates on root-infecting fungi. Annu. Rev. Phytopathol. 2, 101–132 (1964).

    Article  Google Scholar 

  16. Schürmann P., Separation of phosphate esters and algal extracts by thin-layer electrophoresis and chromatography. J. Chromatogr. 39, 507–509 (1969).

    PubMed  Google Scholar 

  17. van Steveninck R. F. M., Potassium fluxes in red beet tissue during its “lag phase”. Physiol. Plant. 15, 211–215 (1962).

    Google Scholar 

  18. Steward F. C., The absorption and accumulation of solutes by living plant cells. I. Experimental conditions which determine salt absorption by storage tissue. Protoplasma 15, 29–58 (1932).

    CAS  Google Scholar 

  19. Tukey H. B.Jr., The leaching of substances from plants. Annu. Rev. Plant Physiol. 21, 305–324 (1970).

    Article  CAS  Google Scholar 

  20. Vakhmistrov D. B., On the function of the apparent free space in plant roots: a study of the absorbing power of epidermal and cortical cells in barley roots. Soviet Plant Physiol. 14, 103–107 (1967).

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Plant Pathology, University of California, Berkeley, California

    Joseph G. Hancock

Authors
  1. Joseph G. Hancock
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Hancock, J.G. Soluble metabolites in intercellular regions of squash hypocotyl tissues: Implications for exudation. Plant Soil 47, 103–112 (1977). https://doi.org/10.1007/BF00010372

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00010372

Keywords

Search

Navigation