New Zealand Journal of Crop and Horticultural Science abstracts

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Growth and physiological characterisation of regenerated potato (Solanum tuberosum) plants affected by NaCl stress

PATRICIA L. MARCONI¹
MARíA P. BENAVIDES¹
OSVALDO H. CASO²

¹Facultad de Farmacia y Bioquímica
Universidad de Buenos Aires
Junin 956, C.P. 1113 Buenos Aires
Argentina
email: pmarconi@mail.retina.ar
²Centro de Ecofisiología Vegetal (CONICET)
Serrano 669, C.P. 1414 Buenos Aires
Argentina

Abstract  A comparative growth analysis was made between salt-tolerant plants obtained by recurrent selection methods in vitro and Solanum tuberosum L. `Kennebec' original mother plants (wild type). They were grown at three different salt concentrations (0.5, 25, and 100 mM NaCl) by hydroponic culture. Fourteen days after the saline treatment was applied, no differences in growth were observed between clones. However, 14 days later (Day 28), the comparative analysis between clones revealed intra-especific differences. The salt-tolerant line (clone 150) exhibited greater tolerance to the highest salt doses. Plants of this clone had greater biomass than wild type (clone T) at all salt concentrations tested. The relative growth rate (RGR) and components, as well as the relative accumulation rate of water (RARwater) and K⁺ and Na⁺ content, should explain, at least in part, the salt-tolerance of clone 150.

Keywords  salt stress; NaCl; potato; Solanum tuberosum



New Zealand Journal of Crop and Horticultural Science, 2001, Vol. 29: 45-50

0014-0671/00/2901-0045 $7.00 (c) The Royal Society of New Zealand 2001



PDF file of entire paper: medium quality (421K); (scanned from paper original: notes about this process)

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