Abstract
Abstract Iron (Fe) deficiency in plants may be caused by heavy metal toxicity and is expressed mainly by chlorosis in young leaves. Zinc (Zn) is often the heavy metal involved. The growth of soybean (Glycine max [L.] Merr.) in a 40 μM Zn nutrient solution was studied using a factorial 2x2x2 experiment; two Fe (20 and 100 μM), two S (0.02 and 20 mM), and two Fe foliar fertilization (with and without Fe‐DTPA) levels. Lower dry matter yield, chlorosis in young leaves, and change in the periodic movement (light/dark) of unifoliate leaves were the main symptoms of Zn toxicity. Plants supplied with 100 μM Fe produced more dry matter than those supplied with 20 μM and did not show leaf chlorosis, but still showed a change in the periodic movement of the leaves. A high Fe supply prevented most of the detrimental effects of toxic Zn. There was no effect of sulfur (S) on plant symptoms, and foliar fertilization with Fe‐DTPA did not result in regreening of chlorotic leaves.
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Claims 9
Claim · model-written summary
Toxic zinc was associated with reduced dry matter yield in soybean.
- Taxon
- soybean
Glycine maxt0 - Treatment
- Zn toxicitye0
- Outcome
- dry matter yielde0
- Direction
- Lowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lower dry matter yield, chlorosis in young leaves, and change in the periodic movement (light/dark) of unifoliate leaves were the main symptoms of Zn toxicity”
t0“soybean”
Claim · model-written summary
Toxic zinc caused chlorosis in young soybean leaves.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Zn toxicitye0
- Outcome
- chlorosis in young leavese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lower dry matter yield, chlorosis in young leaves, and change in the periodic movement (light/dark) of unifoliate leaves were the main symptoms of Zn toxicity”
t0“soybean”
Claim · model-written summary
Toxic zinc changed periodic unifoliate leaf movement.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Zn toxicitye0
- Outcome
- change in the periodic movement (light/dark) of unifoliate leavese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“change in the periodic movement (light/dark) of unifoliate leaves were the main symptoms of Zn toxicity”
t0“soybean”
Claim · model-written summary
Soybean supplied with 100 μM iron produced more dry matter than plants supplied with 20 μM.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants supplied with 100 μM Fe produced more dry matter than those supplied with 20 μM”
t0“soybean”
Claim · model-written summary
Soybean supplied with 100 μM iron did not show leaf chlorosis.
- Taxon
- soybeanGlycine maxt0
- Treatment
- 100 μM Fee0
- Outcome
- leaf chlorosise0
- Direction
- did not showe0
- Comparator
- 20 μMe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants supplied with 100 μM Fe produced more dry matter than those supplied with 20 μM and did not show leaf chlorosis”
t0“soybean”
Claim · model-written summary
High iron did not correct altered periodic leaf movement.
- Taxon
- soybeanGlycine maxt0
- Treatment
- 100 μM Fee0
- Outcome
- change in the periodic movement of the leavese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants supplied with 100 μM Fe produced more dry matter than those supplied with 20 μM and did not show leaf chlorosis, but still showed a change in the periodic movement of the leaves”
t0“soybean”
Claim · model-written summary
High iron prevented most detrimental effects of toxic zinc.
- Taxon
- soybeanGlycine maxt0
- Treatment
- high Fe supplye0
- Outcome
- detrimental effects of toxic Zne0
- Direction
- preventede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A high Fe supply prevented most of the detrimental effects of toxic Zn”
t0“soybean”
Claim · model-written summary
Sulfur had no effect on plant symptoms.
- Taxon
- soybeanGlycine maxt0
- Treatment
- sulfur (S)e0
- Outcome
- plant symptomse0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no effect of sulfur (S) on plant symptoms”
t0“soybean”
Claim · model-written summary
Foliar Fe-DTPA did not regreen chlorotic leaves.
- Taxon
- soybeanGlycine maxt0
- Treatment
- foliar fertilization with Fe‐DTPAe0
- Outcome
- regreening of chlorotic leavese0
- Direction
- did not result ine0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foliar fertilization with Fe‐DTPA did not result in regreening of chlorotic leaves”
t0“soybean”
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See all 38 papers →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.