Drought and excess UV-B irradiation differentially alter the antioxidant system in cucumber leaves

• Autorzy: Kubis J , Rybus-Zajac M.
• Języki publikacji: EN

Abstrakty

EN

The combined effects of enhanced UV-B radiation and soil drought on antioxidant enzyme activity were investigated in cucumber leaves. One-month-old cucumber plants (Cucumis sativus cv. Dar) were exposed to UV-B irradiation and water deficit alone or combined. Physiological measurements were made in seedlings kept under stress conditions for nine days and then two more days with stresses withdrawn. Generally a decrease in relative water content and an increase in dry weight content were recorded. The more significant changes were observed under drought than under UV-B radiation and or combined UV-B and drought. Both stresses stimulated antioxidant enzyme activity. Superoxide dismutase activity increased earlier (day 2) than guaiacol peroxidase and glutathione reductase activity (days 5 and 7). Elevation of enzyme activities was higher under drought than under UV-B. Combined UV-B and drought functioned synergistically: one of the stresses reduced the effects caused by simultaneous application of the other.

Słowa kluczowe

PL

glutathione reductase; guaiacol peroxidase; soil drought; superoxide dismutase; ultraviolet irradiation; oxidative stress; plant stress; cucumber; leaf; antioxidative system; antioxidative enzyme; cucumber plant; Cucumis sativus; Dar cultivar

• Wydawca: -
• Czasopismo: Acta Biologica Cracoviensia. Series Botanica
• Rocznik: 2008
• Tom: 50
• Numer: 2
• Opis fizyczny: p.35-41,fig.,ref.

Twórcy

autor

Kubis J

• Department of Plant Physiology, University of Life Sciences in Poznan, Wolynska 35, 60-637 Poznan, Poland

autor

Rybus-Zajac M.

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