Abstract
Abstract Hawkeye soybeans (Glyclne max L.) were grown for 13 days in nutrient solutions in a glasshouse with differential Ca and trace metal concentrations. Yields were little affected by low Ca levels without excesses of trace metals but yield depressions for excesses of Ni, Cd, Al, Ma, and Cu generally were greater at low Ca levels than at a high level. Ca, Mg and K levels in plants were all depressed by the trace metals. Some of the effects were expressed also in roots. The 10–3M level of Al resulted in virtually no Ca in roots and in diminished transport to shoots. The trace metal concentrations in leaves generally decreased with increasing Ca. Key words: Calcium uptakecalcium transporttrace metalsphytotoxicity
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Claims 10
Claim · model-written summary
Low calcium without excess trace metals had little effect on soybean yield.
- Taxon
- soybeans
Glycine maxe1 - Treatment
- low Ca levelse0
- Outcome
- Yieldse0
- Direction
- little affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yields were little affected by low Ca levels without excesses of trace metals”
e1“Hawkeye soybeans (Glyclne max L.)”
Claim · model-written summary
Excess Ni caused greater soybean yield depression under low than high calcium.
- Taxon
- soybeansGlycine maxe1
- Treatment
- Nie0
- Outcome
- yield depressionse0
- Direction
- greatere0
- Qualifier
- low Ca levelse0
- Comparator
- a high levele0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield depressions for excesses of Ni, Cd, Al, Ma, and Cu generally were greater at low Ca levels than at a high level”
e1“Hawkeye soybeans (Glyclne max L.)”
Claim · model-written summary
Excess Cd caused greater soybean yield depression under low than high calcium.
- Taxon
- soybeansGlycine maxe1
- Treatment
- Cde0
- Outcome
- yield depressionse0
- Direction
- greatere0
- Qualifier
- low Ca levelse0
- Comparator
- a high levele0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield depressions for excesses of Ni, Cd, Al, Ma, and Cu generally were greater at low Ca levels than at a high level”
e1“Hawkeye soybeans (Glyclne max L.)”
Claim · model-written summary
Excess Al caused greater soybean yield depression under low than high calcium.
- Taxon
- soybeansGlycine maxe1
- Treatment
- Ale0
- Outcome
- yield depressionse0
- Direction
- greatere0
- Qualifier
- low Ca levelse0
- Comparator
- a high levele0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield depressions for excesses of Ni, Cd, Al, Ma, and Cu generally were greater at low Ca levels than at a high level”
e1“Hawkeye soybeans (Glyclne max L.)”
Claim · model-written summary
Excess Ma caused greater soybean yield depression under low than high calcium.
- Taxon
- soybeansGlycine maxe1
- Treatment
- Mae0
- Outcome
- yield depressionse0
- Direction
- greatere0
- Qualifier
- low Ca levelse0
- Comparator
- a high levele0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield depressions for excesses of Ni, Cd, Al, Ma, and Cu generally were greater at low Ca levels than at a high level”
e1“Hawkeye soybeans (Glyclne max L.)”
Claim · model-written summary
Excess Cu caused greater soybean yield depression under low than high calcium.
- Taxon
- soybeansGlycine maxe1
- Treatment
- Cue0
- Outcome
- yield depressionse0
- Direction
- greatere0
- Qualifier
- low Ca levelse0
- Comparator
- a high levele0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield depressions for excesses of Ni, Cd, Al, Ma, and Cu generally were greater at low Ca levels than at a high level”
e1“Hawkeye soybeans (Glyclne max L.)”
Claim · model-written summary
Trace metals depressed calcium, magnesium and potassium levels in soybean plants.
- Taxon
- plantsViridiplantaee0
- Treatment
- trace metalse0
- Outcome
- Ca, Mg and K levelse0
- Direction
- depressede0
Not reportedComparator
Verbatim
e0“Ca, Mg and K levels in plants were all depressed by the trace metals”
Claim · model-written summary
Al at 10–3M left virtually no calcium in soybean roots.
- Taxon
- soybean plantsGlycine maxe1
- Treatment
- 10–3M level of Ale0
- Outcome
- Ca in rootse0
- Direction
- virtually noe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 10–3M level of Al resulted in virtually no Ca in roots and in diminished transport to shoots”
e1“soybean plants”
Claim · model-written summary
Al at 10–3M diminished calcium transport to soybean shoots.
- Taxon
- soybean plantsGlycine maxe1
- Treatment
- 10–3M level of Ale0
- Outcome
- transport to shootse0
- Direction
- diminishede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 10–3M level of Al resulted in virtually no Ca in roots and in diminished transport to shoots”
e1“soybean plants”
Claim · model-written summary
Leaf trace metal concentrations generally declined as calcium increased.
Verbatim
e0“The trace metal concentrations in leaves generally decreased with increasing Ca”
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