Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.

Copyright © Wydawnictwo Akademii Rolniczej we Wroclawiu, ISSN 1505-0297

Smolik M. , Kram P. , Krupa-Małkiewicz M. , Smolik B. , Malinowska K. 2011. RESPONSE OF TOMATO GENOTYPES TO SALINITY STRESS ASSESSED AT THE SEEDLINGS STAGE, EJPAU 14(4), #17.
Available Online: http://www.ejpau.media.pl/volume14/issue4/abs-17.html

ABSTRACT

The aim of the study was to characterize phenotype response to salt stress under in vitro conditions of four tomato genotypes: 'Malinowy Ożarowski', 'Pokusa', 'Awizo' F1 and Lycopersicon chmielewskii LA2678. Tomato seeds were cultured with 0 (control), 50, 75, 100 and 125 mmol·dm^-3 NaCl in nutrient solutions. The effect of the stress applied on the morphological traits was evaluated in 14 day-old seedlings. The contents of proline in tomato shoots was also examined. Statistical correlations were found in shoot and root length as well as in the number of roots, with the exception of wild form L. chmielewskii. The analysis of variance showed that the highest shoots were grown on 50 and 100 mmol·dm^-3 NaCl solution. The shortest shoots were observed in the control. Longer roots (8.6 cm) were developed by the plants from the solutions containing 100 mmol·dm^-3 NaCl, the shortest (6.6 cm) – 75 mmol·dm^-3 NaCl. NaCl concentration in the medium significantly affected the number of tomato roots. However, the number of roots developed by the wild form of tomato L. chmielewskii was significantly lower in comparison with the other examined cultivars (mean 38-47%). The highest accumulation of proline in tomato cultivars was observed at 125 mmol·dm^-3 NaCl in nutrient solution and in the wild form at 50 mmol·dm^-3 NaCl.

Key words: Solanum, genotypes, response, salinity, in vitro, seedling stage, proline.

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Miłosz Smolik
Department of Plant Genetics, Breeding and Biotechnology, West Pomeranian University of Technology in Szczecin
Słowackiego St. 17,
71-434 Szczecin, Poland
Phone: +48 91 449 61 95
email: msmolik@zut.edu.pl

P. Kram
13th General Secondary School, Szczecin: Biology&Chemistry, West Pomeranian University of Technology
Słowackiego St. 17,
71-434 Szczecin, Poland

Marcelina Krupa-Małkiewicz
Department of Plant Genetics, Breeding and Biotechnology, West Pomeranian University of Technology in Szczecin, Poland
Słowackiego St. 17,
71-434 Szczecin, Poland
email: mkrupa@zut.edu.pl

Beata Smolik
Department of Biochemistry, West Pomeranian University of Technology
Słowackiego St. 17,
71-434 Szczecin, Poland
email: bsmolik@agro.ar.szczecin.pl

K. Malinowska
Department of Plant Physiology, West Pomeranian University of Technology
Słowackiego St. 17,
71-434 Szczecin, Poland

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Responses to this article, comments are invited and should be submitted within three months of the publication of the article. If accepted for publication, they will be published in the chapter headed 'Discussions' and hyperlinked to the article.

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