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Plant and Soil

, Volume 92, Issue 3, pp 399–404 | Cite as

Mechanism of salt tolerance in wild rice (Oryza coarctata Roxb)

  • A. R. Bal
  • S. K. Dutt
Article

Summary

Oryza coarctata, a highly salt-resistant wild rice species, is commonly found on the banks of coastal rivers in India. This species can also withstand saline water (20 to 40 dSm−1 E.C) submergence for quite a long period. It was revealed thatO. coarctata has some special unicellular salt hairs (trichomes) on the adaxial surface of the leaves, by which they efficiently maintain a low concentration of toxic salts in the plant tissue. Sodium and chloride were the dominant ions in the excreted material but they also excrete potassium, magnesium and calcium. With the increase in soil salinity sodium, magnesium and chloride excretion increased.O. coarctata maintained the optimum mineral concentration in its tissues. Maximum accumulation of potassium was observed in the leaves. With the increase in salt stress total biomass production and osmotic potential increased over control but there was no change in the moisture percentage of leaves.

Key words

Mineral excretion Salt tolerance Trichomes Wild rice 

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References

  1. 1.
    Arisz W H, Camphuis I J, Hckiens H and Van Tooren A J 1955 The secretion of the salt gland inLimonium latifolium. Acta Bot. Neerl. 4, 322–326.Google Scholar
  2. 2.
    Bal A R 1975 A note on the comparative study of free aminoacids content between wild salt tolerant rice and cultivated rice varieties. Curr. Sci. 44, 194–195.Google Scholar
  3. 3.
    Chalam G V 1943 Comparative studies on the anatomy of two wild species in the genus Oryza. Ph. D. thesis, Part-II, Patna University.Google Scholar
  4. 4.
    Hedayetullah S and Chakravorti A K 1941, Mechanical system in five species of the genusOryza. J. Dept. Sci., Bengal, N. S. 1, 21–48.Google Scholar
  5. 5.
    Johansen D A 1940. Dehydration. Plant Microtechnique 130–132.Google Scholar
  6. 6.
    Liphschitz N and Waisel Y 1974 Existence of salt glands in various genera of the Graminese. New Phytol. 73, 507–513.Google Scholar
  7. 7.
    LuttgeU 1971 Structure and function of plant glands. Annu. Rev. Plant Physiol. 22, 23–44.CrossRefGoogle Scholar
  8. 8.
    Richharia R H and Roy J K 1965 Anatomical studies in the genus Oryza-I. Anatomy of Oryza coarctata in relation to its systematic position in the genus. Oryza 2, 1–9.Google Scholar
  9. 9.
    Ruhland W 1975 Untersuchungen Uber die Hautdrusen der Plumbaginaceen. Fb. nist. Bot. 55, 400.Google Scholar
  10. 10.
    Tateoka T 1963 Notes on some grasses. XIII. Relationship between Oryza and Ehrharteae, with special reference to leaf anatomy and histology. Bot. Gaz. 124, 264–270.CrossRefGoogle Scholar
  11. 11.
    Walter H and Steiner M 1936 Die Okologie der Ost-Afri-Kanischen Mangroven. Z. Bot. 30, 85–90.Google Scholar

Copyright information

© Martinus Nijhoff Publishers 1986

Authors and Affiliations

  • A. R. Bal
    • 1
  • S. K. Dutt
    • 1
  1. 1.Regional Station Canning TownCentral Soil Salinity Research InstitutePinCanning TownIndia

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