Letter | Published:

Stimulation of the Uptake of Water and Ions by lndolyl-3-acetic acid : its Dependence on Nucleic Acid and Protein Synthesis

Naturevolume 207pages861862 (1965) | Download Citation



THE plant growth hormone indolyl-3-acetic acid (IAA) affects almost all aspects of growth and development, and the very remarkable promotion of growth is associated with a simultaneous stimulation of water uptake, ion uptake and several metabolic processes. We have previously presented evidence to show that the plant growth substances, IAA, gibberellic acid and kinetin, all regulate the synthesis and release of nuclear RNA and that the fraction of RNA involved has a base composition complementary to that of DNA1–4. The synthesis of nuclear protein, as well as some enzyme systems concerned with the metabolic pathways known to be affected by IAA, is also stimulated by growth promotive concentrations of IAA4,5. In this communication we report that the lAA-induced stimulation of water uptake and ion uptake also involves a nucleic acid system, that this process is inhibited by actinomycin D and that the inhibition is removed by IAA.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.


  1. 1

    Roy Choudhury, R., and Sen, S. P., Biochem. Biophys. Res. Commun., 14, 7 (1963).

  2. 2

    Roy Choudhury, R., and Sen, S. P., Physiol. Plantarum, 17, 352 (1964).

  3. 3

    Roy Choudhury, R., and Sen, S. P., Symposium on Frontiers of Plant Sciences, Bull. Bot. Soc. Bengal, 18, No. 1 (Suppl.), Abstracts (1964).

  4. 4

    Roy Choudhury, R., Datta, A., Datta, A. G., and Sen, S. P. (unpublished results).

  5. 5

    Venis, M. A., Nature, 202, 900 (1964).

  6. 6

    Guttenberg, H. von, and Beythien, A., Planta, 40, 36 (1951).

  7. 7

    Pittilo, R. F., and Quinnely, B. G., Antibiotics Chemother., 12, 55 (1962).

  8. 8

    Sengupta, A., and Sen, S. P., Nature, 192, 1291 (1961).

  9. 9

    Goldberg, I. H., Rabinowitz, M., and Reich, E., Proc. U.S. Nat. Acad. Sci., 48, 2094 (1962).

  10. 10

    Noodén, L. D., and Thimann, K. V., Proc. U.S. Nat. Acad. Sci., 50, 194 (1963).

  11. 11

    Tomkins, G. M., and Maxwell, E., Ann. Rev. Biochem., 32, 677 (1963).

  12. 12

    Edelman, I. S., Bogoroch, R., and Porter, G. A., Proc. U.S. Nat. Acad. Sci., 50, 1169 (1963).

Download references

Author information


  1. Department of Botany, Kalyani University, West Bengal, India

    • R. MITRA
    •  & S. P. SEN


  1. Search for R. MITRA in:

  2. Search for S. P. SEN in:

About this article

Publication history

Issue Date




By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.