Abstract
Chlorophyll a fluorescence parameters and photosynthetic pigments content in leaves of broccoli (Brassica oleracea L. var. italica) cv. ‘Monaco’ F1 and cauliflower (Brassica oleracea L. var. botrytis) cv. ‘Bruce’ F1 transplants were analyzed to investigate the effects of chilling temperatures (6 and 10 °C) and the exposure length (1 or 2 weeks) on the photosynthetic apparatus condition in the 3-year experiment. Data were compared to control plants exposed to 14 °C for 1 and 2 weeks. The lowest values of maximum quantum efficiency of photosystem II (Fv/Fm) and the performance index (PI) were observed in cauliflower chilled at 6 °C for 2 weeks. This was not accompanied by any substantial reduction in chlorophylls concentration, however, significant correlations between Fv/Fm or PI and chlorophylls content in cauliflower leaves were found. There were no negative effects of chilling on photosynthetic activity and chlorophyll content in broccoli leaves, the amount of carotenoids significantly increased in the broccoli chilled for 2 weeks at 6 °C. The chlorophyll a fluorescence indices and accelerated carotenoids synthesis showed that broccoli had less vulnerable photosynthetic apparatus to stress-induced temperatures and more efficient protection mechanisms in comparison to cauliflower transplants.
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Claims 7
Claim · model-written summary
Cauliflower chilled at 6 °C for two weeks had the lowest Fv/Fm and performance index.
- Taxon
- cauliflower
Brassica oleracea var. botrytise0 - Organ / stage
- cauliflowere0
- Treatment
- chilled at 6 °C for 2 weekse0
- Outcome
- maximum quantum efficiency of photosystem II (Fv/Fm) and the performance index (PI)e0
- Direction
- lowest valuese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lowest values of maximum quantum efficiency of photosystem II (Fv/Fm) and the performance index (PI) were observed in cauliflower chilled at 6 °C for 2 weeks”
Claim · model-written summary
Cauliflower chlorophyll concentration was not substantially reduced with chilling.
- Taxon
- CauliflowerBrassica oleracea var. botrytist0
- Treatment
- Chillingt0
- Outcome
- chlorophylls concentratione0
- Direction
- not accompanied by any substantial reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This was not accompanied by any substantial reduction in chlorophylls concentration”
t0“Cauliflower and Broccoli Transplants Subjected to Chilling”
Claim · model-written summary
Cauliflower leaf Fv/Fm or performance index correlated significantly with chlorophyll content.
- Taxon
- cauliflowerBrassica oleracea var. botrytise0
- Organ / stage
- leavese0
- Outcome
- Fv/Fm or PIe0
- Qualifier
- chlorophylls contente0
Not reportedCompoundDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant correlations between Fv/Fm or PI and chlorophylls content in cauliflower leaves were found”
Claim · model-written summary
Broccoli photosynthetic activity and chlorophyll content showed no negative chilling effects.
- Taxon
- broccoli
Brassica oleracea var. italicae0 - Organ / stage
- leavese0
- Treatment
- chillinge0
- Outcome
- photosynthetic activity and chlorophyll contente0
- Direction
- no negative effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were no negative effects of chilling on photosynthetic activity and chlorophyll content in broccoli leaves”
Claim · model-written summary
Broccoli carotenoids increased significantly after two weeks at 6 °C.
- Taxon
- broccoliBrassica oleracea var. italicae0
- Treatment
- chilled for 2 weeks at 6 °Ce0
- Outcome
- amount of carotenoidse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the amount of carotenoids significantly increased in the broccoli chilled for 2 weeks at 6 °C”
Claim · model-written summary
Broccoli photosynthetic apparatus was less vulnerable to chilling than cauliflower.
- Taxon
- broccoliBrassica oleracea var. italicae0
- Outcome
- photosynthetic apparatuse0
- Direction
- less vulnerablee0
- Comparator
- cauliflower transplantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“broccoli had less vulnerable photosynthetic apparatus to stress-induced temperatures and more efficient protection mechanisms in comparison to cauliflower transplants”
Claim · model-written summary
Broccoli showed more efficient protection mechanisms than cauliflower.
- Taxon
- broccoliBrassica oleracea var. italicae0
- Outcome
- protection mechanismse0
- Direction
- more efficiente0
- Comparator
- cauliflower transplantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“broccoli had less vulnerable photosynthetic apparatus to stress-induced temperatures and more efficient protection mechanisms in comparison to cauliflower transplants”
The same questions in other papers
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- positive
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1 paper in the same direction as this paper · 1 in the opposite direction
- positive
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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.