Physiology of poly ploid plants water balance in auto tetra ploid and di ploid tomato under low and high salinity

Tal, M.; Gardi, I.

Physiologia Plantarum 38(4): 257-261

1976


ISSN/ISBN: 0031-9317
DOI: 10.1111/j.1399-3054.1976.tb04000.x
Accession: 006119608

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Abstract
Diploid and autotetraploid plants of the cultivated tomato Lycopersicon esculentum cv. 'Lukullus' (Luk) were studied under low and high salinity. Polyploids had a higher water content than diploid plants. Water content in both plant types decreased under salinity, the decrease being smaller in the polyploid plants. Dry weight of whole young plants decreased in diploid and polyploid plants under salinity, the decrease being smaller in the latter. Transpiration of whole plants, grown in control solution, was lower in polyploid than in diploid plants and decreased more under salinity in the latter. Rate of change of water loss of detached drying leaves was similar in diploid and polyploid plants. Leaves of control diploid plants, however, lost more water per unit leaf area during the phase of stomatal closure apparently due to higher stomatal density. Polyploid plants had fewer but more open stomata per unit leaf urea, under control and saline conditions. Root pressure, determined only under control conditions, seemed to be higher in polyploid plants. No difference in Cl- concentration per unit leaf dry weight was found between diploid and polyploid plants grown in either control or NaCl solution.

Physiology of poly ploid plants water balance in auto tetra ploid and di ploid tomato under low and high salinity