Abstract
Abstract Mn, as Fe, Zn, Cu and Ni is a heavy metal and also a necessary element all the living organisms. Excessive Mn nutrition causes a strong oxidative stress. The aim of the studies was to determination the effect of Se treatment (as sodium selenite Na 2 O 4 Se 3 ) to alleviate the Mn stress of plants. Because of its sensitivity to oxidative stress induced by excessive concentrations of Mn a model plant was lettuce ( Lactuca sativa L. ‘Sunny’). The studies were conducted in a controlled environment growth room in stable climate conditions: 16 h photoperiod; temperature light/dark 18.0 ±0.5°C/16.0 ±0.5°C; relative humidity 70-80%; quantum flux density 195-205 μmol m −2 s −1 . Plants were grown hydroponically in nutrient solution characterized by excessive Mn content (19.2 mg dm −3 ) and different contents of Se (control; 0.77, 1.05, 1.33 mg dm −3 ). In all the combination were also tested different foliar sprays (distilled water and a 0.005% Se solution). Plants grown under conditions described above take up and transported Se from nutrient solutions into their leaves with a significant reduction of Mn concentration and changes in the plant nutrient status. With the increase in the concentrations of Se clearly narrowed quantitative relations in the leaves between this element and micro-metallic. Increasing Se levels in nutrient solution has a positive influence on the growth of plants, but Se foliar treatment generally decreases plant yield. The study shown that Se application may lead to alleviation of Mn stress of plants, with simultaneous reduce in Mn concentration in leaves - which may be of practical importance also in the cultivation of more economically important species.
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Claims 7
Claim · model-written summary
Lettuce took up selenium from nutrient solution and transported it into leaves.
- Taxon
- lettuce
Lactuca sativae0 - Material
- Lactuca sativa L. ‘Sunny’e0
- Outcome
- take up and transported Se from nutrient solutions into their leavese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lettuce ( Lactuca sativa L. ‘Sunny’)”
e1“take up and transported Se from nutrient solutions into their leaves”
Claim · model-written summary
Selenium application significantly reduced manganese concentration in lettuce leaves.
- Taxon
- lettuceLactuca sativae0
- Treatment
- Se from nutrient solutionse1
- Outcome
- Mn concentratione1
- Direction
- reductione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lettuce ( Lactuca sativa L. ‘Sunny’)”
e1“Plants grown under conditions described above take up and transported Se from nutrient solutions into their leaves with a significant reduction of Mn concentration”
Claim · model-written summary
Selenium changed the nutrient status of manganese-stressed lettuce.
- Taxon
- lettuceLactuca sativae0
- Treatment
- See2
- Outcome
- plant nutrient statuse1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lettuce ( Lactuca sativa L. ‘Sunny’)”
e1“significant reduction of Mn concentration and changes in the plant nutrient status”
e2“different contents of Se”
Claim · model-written summary
Increasing nutrient-solution selenium narrowed quantitative leaf relations between selenium and micrometals.
- Taxon
- lettuceLactuca sativae0
- Treatment
- concentrations of See1
- Outcome
- quantitative relations in the leavese1
- Direction
- narrowede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lettuce ( Lactuca sativa L. ‘Sunny’)”
e1“With the increase in the concentrations of Se clearly narrowed quantitative relations in the leaves between this element and micro-metallic”
Claim · model-written summary
Increasing selenium in nutrient solution improved lettuce growth.
- Taxon
- lettuceLactuca sativae0
- Treatment
- Se levels in nutrient solutione1
- Outcome
- growth of plantse1
- Direction
- positivee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lettuce ( Lactuca sativa L. ‘Sunny’)”
e1“Increasing Se levels in nutrient solution has a positive influence on the growth of plants”
Claim · model-written summary
Foliar selenium treatment generally decreased lettuce yield.
- Taxon
- lettuceLactuca sativae0
- Treatment
- Se foliar treatmente1
- Outcome
- plant yielde1
- Direction
- decreasese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lettuce ( Lactuca sativa L. ‘Sunny’)”
e1“Se foliar treatment generally decreases plant yield”
Claim · model-written summary
Authors conclude selenium application may alleviate manganese stress in lettuce.
- Taxon
- lettuceLactuca sativae0
- Outcome
- Se application may lead to alleviation of Mn stress of plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lettuce ( Lactuca sativa L. ‘Sunny’)”
e1“Se application may lead to alleviation of Mn stress of plants”
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