sodininkystė ir daržininkystė 25(4)

SODININKYSTË IR DARÞININKYSTË. SCIENTIFIC ARTICLES. 2006. 25(4).
GROWTH PARAMETERS DEPENDENCE OF TOMATO
(LYCOPERSICON ESCULENTUM MILL.) FROM UV-B
IRRADIATION
R. Vyðniauskienë, V. Ranèelienë, D. Raklevièienë, D. Ðvegþdienë, Z. Janèys,
K. Ðlekytë, P. Duchovskis, A. Brazaitytë, J. Ðikðnianienë
Summary
UV-B stress response induction in tomato may have significance as means for
regulation of plant growth and synthesis of the biological active substances. The
goal of this study was to compare UV-B effect on variuos parameters of tomato cv.
Svara: plant height, fresh and dry weight; weight and area of leaves; concentration
of carotenoids, chlorophylls a and b and protein, superoxside dismutase (SOD) activity
and isozyme spectra in leaves. In two experiments on the same material the
two diferrent UV-B doses 10 and 5 kJ m -2 p -1 UV-B were examinated and it was
showen that manipulation in UV-B doses gives different effect on the same plant
parameter. That effect of UV-B can be used for regulation of tomato growth and
synthesis of various substances. The effect of UV-B on variuos parameters tested in
this work was different. As a tomato response to UV-B, the significant alteration of
SOD spectra has been observed even after treatment with 5 kJ m -2 p -1 UV-B dose
which shows stimulation effect on plant growth parameters.
Key words: UV-B stress, dose differences, tomato, effect on growth, SOD
isozyme spectra.
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