Abstract
The protective effect of selenium against the cadmium-induced oxidative effect in broccoli ( Brassica oleracea) plants was studied. Plants grown in hydroponic culture were supplied with selenium [as Se(IV)] and cadmium [as Cd(II)], individually or simultaneously. Cadmium accumulation in roots was noticeably higher than in the aerial parts of the plants, and this effect was even more acute when selenium was simultaneously added. Cadmium phytotoxicity was evidenced by an increase in the malondialdehyde (MDA) concentration in the roots and a decrease of photosynthetic pigment and tocopherol concentration in the aerial parts of the plant. The simultaneous addition of selenium alleviated cadmium-induced stress in the roots after 40 days of exposition. In the leaves, a more remarkable decrease of tocopherol and chlorophyll concentration was observed in the cadmium-enriched plants after 10 days of exposure. The results provided evidence that selenium supplementation helps the plant to minimize the cadmium oxidant effect. Tocopherol concentration in broccoli fruit of cadmium-supplied plants was not affected in comparison to control. However, the proportion of alpha-tocopherol increases with the addition of selenium. This response is important not only for the protective effect against oxidative damage in the plant but also in terms of human nutrition.
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Claims 8
Claim · model-written summary
Cadmium accumulated more in broccoli roots than aerial parts.
- Taxon
- Broccoli
Brassica oleracea var. italicat0 - Organ / stage
- rootse0
- Outcome
- Cadmium accumulatione0
- Direction
- highere0
- Comparator
- aerial partse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cadmium accumulation in roots was noticeably higher than in the aerial parts of the plants”
t0“Broccoli”
Claim · model-written summary
Simultaneous selenium addition accentuated the root versus aerial-part difference in cadmium accumulation.
- Taxon
- BroccoliBrassica oleracea var. italicat0
- Treatment
- seleniume0
- Outcome
- this effecte0
- Direction
- more acutee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this effect was even more acute when selenium was simultaneously added.”
t0“Broccoli”
Claim · model-written summary
Cadmium increased malondialdehyde concentration in broccoli roots.
- Taxon
- BroccoliBrassica oleracea var. italicat0
- Organ / stage
- rootse0
- Treatment
- Cadmiume0
- Outcome
- malondialdehyde (MDA) concentratione0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cadmium phytotoxicity was evidenced by an increase in the malondialdehyde (MDA) concentration in the roots”
t0“Broccoli”
Claim · model-written summary
Cadmium decreased photosynthetic pigment concentration in aerial broccoli tissues.
- Taxon
- BroccoliBrassica oleracea var. italicat0
- Organ / stage
- aerial partse0
- Outcome
- photosynthetic pigment and tocopherol concentratione0
- Direction
- decreasee0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a decrease of photosynthetic pigment and tocopherol concentration in the aerial parts of the plant.”
t0“Broccoli”
Claim · model-written summary
Adding selenium alleviated cadmium stress in broccoli roots after 40 days.
- Taxon
- BroccoliBrassica oleracea var. italicat0
- Organ / stage
- rootse0
- Treatment
- simultaneous addition of seleniume0
- Outcome
- cadmium-induced stresse0
- Direction
- alleviatede0
- Qualifier
- after 40 days of expositione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The simultaneous addition of selenium alleviated cadmium-induced stress in the roots after 40 days of exposition.”
t0“Broccoli”
Claim · model-written summary
Cadmium exposure decreased broccoli leaf tocopherol and chlorophyll concentrations after ten days.
- Taxon
- BroccoliBrassica oleracea var. italicat0
- Treatment
- cadmium-enrichede0
- Outcome
- tocopherol and chlorophyll concentratione0
- Direction
- decreasee0
- Qualifier
- after 10 days of exposuree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a more remarkable decrease of tocopherol and chlorophyll concentration was observed in the cadmium-enriched plants after 10 days of exposure.”
t0“Broccoli”
Claim · model-written summary
Cadmium did not affect tocopherol concentration in broccoli fruit versus control.
- Taxon
- broccoliBrassica oleracea var. italicae0
- Organ / stage
- fruite0
- Treatment
- cadmium-suppliede0
- Outcome
- Tocopherol concentratione0
- Direction
- not affectede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tocopherol concentration in broccoli fruit of cadmium-supplied plants was not affected in comparison to control.”
Claim · model-written summary
Selenium increased the proportion of alpha-tocopherol in broccoli fruit.
- Taxon
- BroccoliBrassica oleracea var. italicat0
- Treatment
- addition of seleniume0
- Outcome
- proportion of alpha-tocopherole0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the proportion of alpha-tocopherol increases with the addition of selenium.”
t0“Broccoli”
The same questions in other papers
selenium atom · molecular: metabolites · Brassica oleracea (wild cabbage)Positive and negative results
11 papers in the same direction as this paper · 2 in the opposite direction
- positive
- no effect
- negative
10 papers more in this group
See all 14 papers →cadmium atom · physiology: oxidative · Brassica oleracea (wild cabbage)Results agree
3 papers in the same direction as this paper
- negative
- negative
- negative
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.