Section 7
Chapter 6,296

Relations between the seed tolerance or sensitivity to salinity at the germination time and the sodium components of nutrition

Guerrier, G.

Biologia Plantarum 26(1): 22-28


ISSN/ISBN: 0006-3134
Accession: 006295421

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Adsorption, absorption and translocation of Na were compared in 3 spp. [Raphanus sativus, Brassica oleracea, Lycopersicon esculentum] showing an ascending degree in tolerance to salinity: red cabbage (tolerant) shows higher root cation exchange capacity than tomato (sensitive) or radish (intermediate). At low NaCl concentrations, tomato accumulates the greatest quantities of Na, but Na+ translocation remains proportional to the quantity absorbed in the 3 plants. At high salt concentrations, diffusive phenomena explain similar accumulation in every plant, but red cabbage quickly localizes 50% of Na+ amount in cotyledons, while this element stays stored in tomato roots. The consequence of these 3 nutrition phases was discussed in relation to the behavior observed at the germination time of these same plants.

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