ISSN:
1573-5036
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary Germination of pea seeds sown in saline substrate was delayed. The higher the salinity level the longer was the delay. From root protrusion and until the seventh day after sowing the rate of growth of the seedlings was practically unaffected by salinity. From that time on the effect of salinity became more and more apparent. An increase in growth rate of shoots was observed on exposure to −3 to −4 atm of either NaCl or Na2SO4; a slight increase in growth of roots exposed to −3 atm NaCl was apparent. Otherwise increasing levels of NaCl salinity resulted in a reduced growth rate. The effects of sulphate salinity were practically non-significant. Pea plants grown in Na2SO4-salinized media up to 14 days showed a complete osmotic adjustment. This was not the case with plants grown in NaCl-salinized media. Sodium accumulated in the roots of plants exposed to both types of salinity but it was hardly transported into the shoots. Kcontent dropped considerably on exposure to salinity. Chloride accumulated in both roots and shoots. In roots its concentration exceeded that of the external medium and was higher than the concentration of Na + K. The relevance of these results for the explanation of the effect of salinity on growth of the pea seedlings is discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01373497
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