Abstract
Abstract The aim of this study was to introduce older transplants of broccoli into field conditions to shorten their growing period and to obtain a crop with a high nutritive value. The additional storage of relatively old (four- and eightweek- old) transplants in a cold chamber before planting in the field shortens the growing period; however, it can influence the chemical composition of the leaves and heads. According to earlier research, the preliminary chilling of transplants affected the high yielding of broccoli; a determination of the quality of plants, including select health-promoting properties, was necessary for their full characteristics. In the present work, the four- and eight-week-old broccoli transplants were kept at 2°C either for one or two weeks before planting in the field. Catalase (CAT) and peroxidase (POD) activity as well and the accumulation of phenolic compounds were determined in the leaves of the transplants before and after chilling. The same parameters were detected in the leaves and heads of broccoli at harvest time. The effect of low temperature treatment on CAT activity was observed only at the stage of transplants; however, the increased activity of POD stimulated by chilling was maintained during the growing period until the harvest. The reaction of the plants to low temperatures can be connected with their mechanism against stress conditions and seems to vary in the case of those antioxidative enzymes. The effect of chilling on the accumulation of phenolics (total, cinnamic acid derivatives, flavonols) was noted only in transplants and was not evident during the harvest. The differences observed between the individual seasons of the experiment, both in enzyme activity and synthesis of phenolics, were most likely caused by the differing climatic conditions
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Claims 4
Claim · model-written summary
Chilling affected catalase activity only in transplants.
- Taxon
- broccoli
Brassica oleracea var. italicat0 - Organ / stage
- transplantse0
- Treatment
- low temperature treatmente0
- Outcome
- CAT activitye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of low temperature treatment on CAT activity was observed only at the stage of transplants”
t0“broccoli”
Claim · model-written summary
Chilling increased peroxidase activity, and the increase persisted until harvest.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- chillinge0
- Outcome
- activity of PODe0
- Direction
- increasede0
- Qualifier
- until the harveste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the increased activity of POD stimulated by chilling was maintained during the growing period until the harvest.”
t0“broccoli”
Claim · model-written summary
Chilling affected phenolic accumulation in transplants, with no evident effect at harvest.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Organ / stage
- transplantse0
- Treatment
- chillinge0
- Outcome
- accumulation of phenolicse0
- Qualifier
- not evident during the harveste0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of chilling on the accumulation of phenolics (total, cinnamic acid derivatives, flavonols) was noted only in transplants and was not evident during the harvest.”
t0“broccoli”
Claim · model-written summary
Seasonal differences in enzyme activity and phenolic synthesis were attributed to climatic conditions.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Outcome
- enzyme activity and synthesis of phenolicse0
- Qualifier
- most likelye0
- Setting
- individual seasonse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The differences observed between the individual seasons of the experiment, both in enzyme activity and synthesis of phenolics, were most likely caused by the differing climatic conditions”
t0“broccoli”
The same questions in other papers
cold · physiology: antioxidant enzymes · Brassica oleracea (wild cabbage)Results differ
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- 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.