Abstract
Abstract The aim of this study was to assess the combined effect of substrate acidity (pH 4.8; pH 3.8) and 1 kJm−2d−1 UV-B radiation on photosynthesis and growth of radishes (Raphanus sativus L.). Radishes were sown in a neutral pH 6.5 peat substrate. When the second true leaf unfolded, the growth substrate was acidified using different concentration of H2SO4 and exposed to UV-B radiation for a period of ten days. Gas exchange parameters were measured with the LI-6400 portable photosynthesis system. Content of chlorophyll was evaluated spectrophotometrically. The results showed that the greatest inhibition of net photosynthesis was observed when radishes were grown in an acidified pH 3.8 substrate. The decrease of the photosynthesis of radish plants treated with both investigated factors (substrate acidity and UV-B) were lower compared to the effect of substrate acidity alone. UV-B radiation stimulated both enzymatic reactions of photosynthesis and water use efficiency of radish plants grown in acidified peat substrates. Also, investigated factors had higher impact on biomass of tuber than biomass of foliage.
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Claims 4
Claim · model-written summary
Radishes grown in an acidified pH 3.8 substrate showed the greatest inhibition of net photosynthesis.
- Taxon
- radishes
Raphanus sativuse1 - Treatment
- acidified pH 3.8 substratee2
- Outcome
- net photosynthesise2
- Direction
- greatest inhibitione2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“growth of radishes (Raphanus sativus L.)”
e2“The results showed that the greatest inhibition of net photosynthesis was observed when radishes were grown in an acidified pH 3.8 substrate”
Claim · model-written summary
The photosynthesis decrease under combined substrate acidity and UV-B was lower than under substrate acidity alone.
- Taxon
- radishesRaphanus sativuse1
- Treatment
- substrate acidity and UV-Be3
- Outcome
- decrease of the photosynthesise3
- Direction
- lowere3
- Comparator
- substrate acidity alonee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“growth of radishes (Raphanus sativus L.)”
e3“The decrease of the photosynthesis of radish plants treated with both investigated factors (substrate acidity and UV-B) were lower compared to the effect of substrate acidity alone”
Claim · model-written summary
UV-B radiation stimulated enzymatic reactions of photosynthesis and water use efficiency of radish plants grown in acidified peat substrates.
- Taxon
- radish plantsRaphanus sativuse4
- Treatment
- UV-B radiatione4
- Outcome
- enzymatic reactions of photosynthesis and water use efficiencye4
- Direction
- stimulatede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“growth of radishes (Raphanus sativus L.)”
e4“UV-B radiation stimulated both enzymatic reactions of photosynthesis and water use efficiency of radish plants grown in acidified peat substrates”
Claim · model-written summary
The investigated factors had a higher impact on tuber biomass than on foliage biomass in radishes.
- Taxon
- radishesRaphanus sativuse1
- Treatment
- investigated factorse5
- Outcome
- biomass of tubere5
- Direction
- higher impacte5
- Comparator
- biomass of foliagee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“growth of radishes (Raphanus sativus L.)”
e5“investigated factors had higher impact on biomass of tuber than biomass of foliage”
The same questions in other papers
growing medium · physiology: photosynthesis · Raphanus sativus (radish)Positive and negative results
1 in the opposite direction
- negative
uv · physiology: photosynthesis · Raphanus sativus (radish)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.