Abstract
Abstract Young maize plants, grown hydroponically, were supplied with different amounts (7.5,0.75,0.15, 0.075, and 0 mg Fe/L) of iron (Fe). At 14, 21, and 28 days, in vitro activities of catalase, peroxidase and nitrate reductase in leaves were determined. Strong and complete Fe deficiency resulted in decreased enzyme activities. Under moderate Fe deficiency—often a restoration of the normal activity after an initial reduction—was observed. The rapidity and the degree of reaction to Fe deficiency depended on the enzyme. The ratio peroxydase/catalase activity can not be applied as a reliable tool for diagnosis of Fe deficiency.
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Claims 4
Claim · model-written summary
Strong and complete iron deficiency decreased catalase, peroxidase and nitrate reductase activities in maize leaves.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Strong and complete Fe deficiency resulted in decreased enzyme activities.”
t0“maize”
Claim · model-written summary
Moderate iron deficiency often allowed enzyme activity to recover after an initial reduction.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“young maize plants”
e0“Under moderate Fe deficiency—often a restoration of the normal activity after an initial reduction—was observed.”
Claim · model-written summary
The reaction to iron deficiency differed by enzyme in speed and degree.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“young maize plants”
e0“The rapidity and the degree of reaction to Fe deficiency depended on the enzyme.”
Claim · model-written summary
The peroxydase/catalase activity ratio was unreliable for diagnosing maize iron deficiency.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“young maize plants”
e0“The ratio peroxydase/catalase activity can not be applied as a reliable tool for diagnosis of Fe deficiency.”
The same questions in other papers
iron atom · soil: biology · Zea mays (maize)Results agree
2 papers in the same direction as this paper
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
- positive
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.