Abstract
Aim. The goal of this work was to study the adaptive reaction of young corn plants (Zea mays L.) to the action of acute ultraviolet B (UV-B) radiation in the vegetative growth period. Methods. Corn plants hybrid Dostatok 300 MV in the phase of two leaves were irradiated by UV-B at doses of 1, 2, 4, 8, 16 kJ/m2 with a power of 6 W/m2 and were grown in a long day conditions. After irradiation, the growth of shoots in length, the growth of the mass of plants, the content of photosynthetic pigments and endogenous hydrogen peroxide (HP) in the leaves were determined. Results. It is shown that after irradiation of corn plants UV-B at doses of 4, 8, 16 kJ/m2 the growth of shoots in length decreased, after the irradiation of UV-B at doses of 1, 2 kJ/m2 mass of plants increased. UV-B irradiation in all doses, except for a dose of 16 kJ/m2, stimulated the accumulation of photosynthetic pigments in the leaves. Increasing HP content in the leaves was determined in corn leaves after irradiation of UV-B in all doses. Conclusions. It is shown that irradiation of young corn plants by acute UV-B at doses from 1 to 16 kJ/m2 induced adaptive reactions, that included inhibition of shoot growth with simultaneous stimulation of plants mass growth, accumulation of photosynthetic pigments, increased endogenous content of HP. The adaptive period lasted about 10 days, after that processes of growth, formation of a photosynthetic apparatus and content of HP were stabilized. UV-B belongs to the necessary components of sunlight components for corn growth. Keywords: UV-B radiation, Zea mays L., photosynthetic pigments, adaptation.
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Claims 5
Claim · model-written summary
UV-B doses of 4, 8 and 16 kJ/m2 decreased corn shoot length growth.
- Taxon
- corn plants
Zea mays subsp. mayse0 - Treatment
- UV-B at doses of 4, 8, 16 kJ/m2e0
- Outcome
- growth of shoots in lengthe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“after irradiation of corn plants UV-B at doses of 4, 8, 16 kJ/m2 the growth of shoots in length decreased”
Claim · model-written summary
UV-B doses of 1 and 2 kJ/m2 increased corn plant mass.
Not reportedTaxonComparator
Verbatim
e0“after the irradiation of UV-B at doses of 1, 2 kJ/m2 mass of plants increased”
Claim · model-written summary
UV-B irradiation at all tested doses except 16 kJ/m2 stimulated leaf photosynthetic pigment accumulation.
- Organ / stage
- leavese0
- Treatment
- UV-B irradiatione0
- Outcome
- accumulation of photosynthetic pigmentse0
- Direction
- stimulatede0
- Qualifier
- except for a dose of 16 kJ/m2e0
Not reportedTaxonComparator
Verbatim
e0“UV-B irradiation in all doses, except for a dose of 16 kJ/m2, stimulated the accumulation of photosynthetic pigments in the leaves”
Claim · model-written summary
UV-B irradiation at every tested dose increased hydrogen peroxide content in corn leaves.
- Taxon
- cornZea mays subsp. mayse0
- Organ / stage
- leavese0
- Treatment
- UV-Be0
- Outcome
- HP contente0
- Direction
- Increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing HP content in the leaves was determined in corn leaves after irradiation of UV-B in all doses”
Claim · model-written summary
The adaptive period lasted about 10 days before growth, photosynthetic apparatus formation and HP content stabilized.
Not reportedTaxon
Verbatim
e0“The adaptive period lasted about 10 days, after that processes of growth, formation of a photosynthetic apparatus and content of HP were stabilized”
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