caa a22 4500 47713534X CHVBK 20180405111716.0 cr unu---uuuuu 170330e19970501xx s 000 0 eng 10.1023/A:1002933325347 doi (NATIONALLICENCE)springer-10.1023/A:1002933325347 Assessment of tolerance to salt stress in Kenyan tomato germplasm [Elektronische Daten] [Stephen Agong, Siegfried Schittenhelm, Wolfgang Friedt] Tomato is an important vegetable crop in Kenya and the development of salt tolerant cultivars would enhance its productivity in the vast marginal areas of the country. This study was aimed at determining the magnitude of genotypic variability for salt tolerance in the Kenyan tomato germplasm. Pot experiments with 22 landraces and 9 market cultivars were laid out as a two and four replicate split-plot design in glasshouse in Experiments 1 and 2, respectively. Salt treatments in Experiment 1 were 0 and 5 g NaCl kg-1 resulting into 0.5 and 9.1 dS m-1 of the soil saturation extracts, respectively. In Experiment 2 the treatments were 0, 4, and 8 g NaCl kg-1 soil corresponding to 0.5, 7.4, and 14.2 dS m-1, respectively. Data were recorded on agronomic and biochemical parameters. The germplasm showed large variation for salt tolerance. Fruit and seed production at soil salinity of 14.2 dS m-1 demonstrated that these tomatoes are fairly tolerant of NaCl. Osmotic adjustment was achieved by higher fruit electrical conductivity, brix and total titratable acidity. Low and high contents of K+, Ca2+ and Mg2+ within tomato tissues and soil, respectively, under salt treatment, confirmed competition and antagonism involving Na+ and these cations. Low Na+ and Cl- contents in the fruit at 7.4 dS m-1 revealed their exclusion and ensured production of physiologically normal seeds and nutritionally healthy fruits. Two landraces ‘Chwerotonglo' and ‘Nyanyandogo' were identified as salt tolerant. Comparatively, the market cultivars showed superior fruit yields despite their susceptibility to salinity. Accordingly, tolerance of landraces in combination with superior yields of the market cultivars is suitable for tomato improvement for salt tolerance. Kluwer Academic Publishers, 1997 Lycopersicon esculentum nationallicence tomato landraces nationallicence salt stress tolerance nationallicence osmotic adjustment nationallicence adaptation nationallicence breeding potential nationallicence Agong Stephen Federal Agricultural Research Centre, Braunschweig-Völkenrode (FAL), Institute of Crop Science, Bundesalle 50, D-38116, Braunschweig, Germany aut Schittenhelm Siegfried Federal Agricultural Research Centre, Braunschweig-Völkenrode (FAL), Institute of Crop Science, Bundesalle 50, D-38116, Braunschweig, Germany aut Friedt Wolfgang Institute of Crop Science and Plant Breeding I, Justus-Liebig University Giessen, Ludwigstr. 23, D-35390, Giessen, Germany aut Euphytica Kluwer Academic Publishers 95/1(1997-05-01), 57-66 0014-2336 95:1<57 1997 95 10681 https://doi.org/10.1023/A:1002933325347 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1002933325347 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Agong Stephen Federal Agricultural Research Centre, Braunschweig-Völkenrode (FAL), Institute of Crop Science, Bundesalle 50, D-38116, Braunschweig, Germany aut NATIONALLICENCE 700 1- Schittenhelm Siegfried Federal Agricultural Research Centre, Braunschweig-Völkenrode (FAL), Institute of Crop Science, Bundesalle 50, D-38116, Braunschweig, Germany aut NATIONALLICENCE 700 1- Friedt Wolfgang Institute of Crop Science and Plant Breeding I, Justus-Liebig University Giessen, Ludwigstr. 23, D-35390, Giessen, Germany aut NATIONALLICENCE 773 0- Euphytica Kluwer Academic Publishers 95/1(1997-05-01), 57-66 0014-2336 95:1<57 1997 95 10681 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer