Does Salinity Induce Early Ageing of Pea Root Tissue?

The effect of salinity on ageing of pea roots was studied. The distance from the apex at which differentiation of xylem elements occurred and the relative increase in the function of pentose phosphate pathways were taken as parameters for maturation or ageing. Pea seeds (Pisum stivum L.) of the vari...

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Bibliographic Details
Published in:Oecologia 1981-08, Vol.50 (1), p.94-97
Main Authors: Hasson, E., Poljakoff-Mayber, A.
Format: Article
Language:English
Subjects:
Carbohydrate metabolism
Peas
Phosphates
Plant roots
Plants
Root tips
Roots of functions
Salinity
Xylem
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Summary:The effect of salinity on ageing of pea roots was studied. The distance from the apex at which differentiation of xylem elements occurred and the relative increase in the function of pentose phosphate pathways were taken as parameters for maturation or ageing. Pea seeds (Pisum stivum L.) of the varieties Alaska and Dan were used in these experiments. The seeds were germinated and grown in vermiculite moistened with Hoagland's solution or Hoagland's solution containing either 96 or 120 mM NaCl. In Alaska roots salinity induced differentiation in a lower section of the root than in controls, and the increase in the function of the pentose phosphate pathway paralleled the advance of maturation. Salinity apparently induces earlier ageing in Alaska roots. This is not the case in Dan roots which tolerate slightly higher salinity levels than Alaska.
ISSN:0029-8549
1432-1939
DOI:10.1007/BF00378799