Abstract
The toxic heavy metal cadmium is taken up by plants and may contaminate harvested parts of agricultural crops. In the experiments reported here, cadmium was introduced together with markers for phloem (rubidium) and xylem (strontium) transport, either into intact shoots via a flap below the flag leaf node, or into detached shoots via the cut stem. Cadmium introduced into intact plants was redistributed during maturation from the peduncle and the flag leaf lamina to the grain. In detached shoots, some cadmium was removed from the transpiration stream, as judged from the comparison of shoots steam-girdled below the ear and of controls with an intact phloem in the peduncle. A minor quantity of cadmium was transported to the grain via the phloem in control shoots while a high percentage of this element was retained in the peduncle. The cadmium content of the grain increased in response to the increased cadmium concentrations in the feeding solutions (0n1 to 10 ). The cadmium content of the grain was slightly lower when zinc ( 10 ) was introduced at the same time as cadmium (1 ).
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Claims 6
Claim · model-written summary
Cadmium introduced into intact wheat plants redistributed from peduncle and flag leaf lamina to grain during maturation.
- Taxon
- Wheat
Triticum aestivumt0 - Organ / stage
- graine0
- Outcome
- Cadmium introduced into intact plants was redistributed during maturation from the peduncle and the flag leaf lamina to the graine0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cadmium introduced into intact plants was redistributed during maturation from the peduncle and the flag leaf lamina to the grain.”
t0“Wheat”
Claim · model-written summary
Some cadmium was removed from the transpiration stream in detached shoots, based on comparison of girdled shoots and controls.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- shoots steam-girdled below the eare0
- Outcome
- cadmium was removed from the transpiration streame0
- Direction
- removede0
- Comparator
- controls with an intact phloem in the pedunclee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In detached shoots, some cadmium was removed from the transpiration stream, as judged from the comparison of shoots steam-girdled below the ear and of controls with an intact phloem in the peduncle.”
t0“Wheat”
Claim · model-written summary
A minor quantity of cadmium reached grain through phloem in control shoots.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- graine0
- Outcome
- cadmium was transported to the grain via the phloeme0
- Qualifier
- minor quantitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A minor quantity of cadmium was transported to the grain via the phloem in control shoots”
t0“Wheat”
Claim · model-written summary
A high percentage of cadmium remained in the peduncle.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- pedunclee0
- Outcome
- this element was retained in the pedunclee0
- Qualifier
- high percentagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a high percentage of this element was retained in the peduncle”
t0“Wheat”
Claim · model-written summary
Grain cadmium content increased with cadmium concentration in feeding solutions.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- graine0
- Treatment
- increased cadmium concentrations in the feeding solutionse0
- Outcome
- cadmium content of the graine0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cadmium content of the grain increased in response to the increased cadmium concentrations in the feeding solutions (0n1 to 10 ).”
t0“Wheat”
Claim · model-written summary
Adding zinc with cadmium slightly lowered grain cadmium content.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- graine0
- Treatment
- zinc ( 10 ) was introduced at the same time as cadmium (1 )e0
- Outcome
- cadmium content of the graine0
- Direction
- slightly lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cadmium content of the grain was slightly lower when zinc ( 10 ) was introduced at the same time as cadmium (1 ).”
t0“Wheat”
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