Abstract
Abstract The effects of iron (Fe) deficiency on catalase and peroxidase activity, net photosynthesis (Pn), stomatal conductance (g s ), plant water relations, and specific leaf weight, were studied under greenhouse conditions in two sweet orange (C. sinensis) cultivars grafted on sour orange (Citrus aurantium) and Swingle citrumelo (C. paradisi × P. trifoliata). Iron deficiency caused by the absence of Fe in the Hoagland nutrient solution reduced significantly catalase and peroxidase activity, photosynthesis (Pn), osmotic potential (Ψ π ), turgor potential (Ψ p ), and specific leaf weight, but did not influence g s and leaf water potential (Ψ L ). Iron deficiency caused by increasing concentrations of bicarbonate supplied as NaHCO3 (10 and 40 mM) in the nutrient solution reduced significantly g s , Pn, and Ψ p and increased Ψ L and Ψ π . Furthermore, remarkable differences were recorded between the various cultivars/rootstocks combinations.
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Claims 9
Claim · model-written summary
Iron omission significantly reduced catalase and peroxidase activity in citrus.
- Treatment
- absence of Fe in the Hoagland nutrient solutione0
- Outcome
- catalase and peroxidase activitye0
- Direction
- reducede0
CitrusNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Iron deficiency caused by the absence of Fe in the Hoagland nutrient solution reduced significantly catalase and peroxidase activity, photosynthesis (Pn), osmotic potential (Ψ π ), turgor potential (Ψ p ), and specific leaf weight”
t0“Citrus”
Claim · model-written summary
Iron omission significantly reduced citrus photosynthesis.
- Treatment
- absence of Fe in the Hoagland nutrient solutione0
- Outcome
- photosynthesis (Pn)e0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Iron deficiency caused by the absence of Fe in the Hoagland nutrient solution reduced significantly catalase and peroxidase activity, photosynthesis (Pn), osmotic potential (Ψ π ), turgor potential (Ψ p ), and specific leaf weight”
t0“Citrus”
Claim · model-written summary
Iron omission significantly reduced osmotic and turgor potentials in citrus.
- Treatment
- absence of Fe in the Hoagland nutrient solutione0
- Outcome
- osmotic potential (Ψ π ), turgor potential (Ψ p )e0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Iron deficiency caused by the absence of Fe in the Hoagland nutrient solution reduced significantly catalase and peroxidase activity, photosynthesis (Pn), osmotic potential (Ψ π ), turgor potential (Ψ p ), and specific leaf weight”
t0“Citrus”
Claim · model-written summary
Iron omission significantly reduced specific leaf weight in citrus.
- Treatment
- absence of Fe in the Hoagland nutrient solutione0
- Outcome
- specific leaf weighte0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Iron deficiency caused by the absence of Fe in the Hoagland nutrient solution reduced significantly catalase and peroxidase activity, photosynthesis (Pn), osmotic potential (Ψ π ), turgor potential (Ψ p ), and specific leaf weight”
t0“Citrus”
Claim · model-written summary
Iron omission did not influence stomatal conductance or leaf water potential in citrus.
- Treatment
- absence of Fe in the Hoagland nutrient solutione0
- Outcome
- g s and leaf water potential (Ψ L )e0
- Direction
- did not influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Iron deficiency caused by the absence of Fe in the Hoagland nutrient solution reduced significantly catalase and peroxidase activity, photosynthesis (Pn), osmotic potential (Ψ π ), turgor potential (Ψ p ), and specific leaf weight, but did not influence g s and leaf water potential (Ψ L )”
t0“Citrus”
Claim · model-written summary
Bicarbonate-induced iron deficiency significantly reduced stomatal conductance and photosynthesis in citrus.
- Treatment
- increasing concentrations of bicarbonate supplied as NaHCO3 (10 and 40 mM) in the nutrient solutione0
- Outcome
- g s , Pne0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Iron deficiency caused by increasing concentrations of bicarbonate supplied as NaHCO3 (10 and 40 mM) in the nutrient solution reduced significantly g s , Pn, and Ψ p and increased Ψ L and Ψ π”
t0“Citrus”
Claim · model-written summary
Bicarbonate-induced iron deficiency significantly reduced citrus turgor potential.
- Treatment
- increasing concentrations of bicarbonate supplied as NaHCO3 (10 and 40 mM) in the nutrient solutione0
- Outcome
- Ψ pe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Iron deficiency caused by increasing concentrations of bicarbonate supplied as NaHCO3 (10 and 40 mM) in the nutrient solution reduced significantly g s , Pn, and Ψ p and increased Ψ L and Ψ π”
t0“Citrus”
Claim · model-written summary
Bicarbonate-induced iron deficiency increased citrus leaf water and osmotic potentials.
- Treatment
- increasing concentrations of bicarbonate supplied as NaHCO3 (10 and 40 mM) in the nutrient solutione0
- Outcome
- Ψ L and Ψ πe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Iron deficiency caused by increasing concentrations of bicarbonate supplied as NaHCO3 (10 and 40 mM) in the nutrient solution reduced significantly g s , Pn, and Ψ p and increased Ψ L and Ψ π”
t0“Citrus”
Claim · model-written summary
Citrus cultivar/rootstock combinations differed markedly in their responses.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“remarkable differences were recorded between the various cultivars/rootstocks combinations”
t0“Citrus”
The same questions in other papers
iron atom · growth · CitrusResults agree
3 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
- positive
fertilization · physiology: antioxidant enzymes · CitrusPositive and negative results
3 in the opposite direction
- positive
- positive
- positive
fertilization · physiology: photosynthesis · CitrusPositive and negative results
4 in the opposite direction
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →fertilization · growth · CitrusPositive and negative results
4 papers in the same direction as this paper · 25 in the opposite direction
- positive
- positive
- positive
26 papers more in this group
See all 30 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.