Abstract
Photosynthetic rate was much lowered in soybean leaves suffering from iron deficiency than in the control (Figs.1,2). The decrease in photosynthesis might not be due to the severely lowered pigment content. Iron deficiency had only slight impact on the activity of PSII (Fig.3). The larger extent of PQ reduction in Fe deficient soybean leaves showed that electron transport at the acceptor side of PSII was blocked apparently (Fig.4), indicating that the blocked electron transport may be the main factor of photosynthesis reduction. It was observed that antenna efficiency at open PSII reaction centers (Fv′/Fm′) decreased in iron deficient soybean leaves, and excited energy used in photochemical reaction was also suppressed (Fig.5). Excitation energy dissipation was higher in iron deficient soybean leaves (Fig.6). It is proposed that xanthophyll cycle may be fully triggered in iron deficient soybean leaves through inhibitor treatment and analysis of xanthophyll cycle pigments (Figs.6, 7).
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Claims 9
Claim · model-written summary
Iron deficiency lowered soybean leaf photosynthetic rate relative to control.
- Taxon
- soybean
Glycine maxe0 - Organ / stage
- leavese0
- Treatment
- iron deficiencye0
- Outcome
- Photosynthetic ratee0
- Direction
- lowerede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Photosynthetic rate was much lowered in soybean leaves suffering from iron deficiency than in the control”
Claim · model-written summary
Iron deficiency had only slight impact on PSII activity.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Iron deficiencye0
- Outcome
- activity of PSIIe0
- Qualifier
- slight impacte0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Iron deficiency had only slight impact on the activity of PSII”
t0“Soybean Leaves”
Claim · model-written summary
PQ reduction was greater in iron deficient soybean leaves.
- Taxon
- soybeanGlycine maxe0
- Organ / stage
- leavese0
- Treatment
- Fe deficiente0
- Outcome
- PQ reductione0
- Direction
- largere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The larger extent of PQ reduction in Fe deficient soybean leaves”
Claim · model-written summary
The authors interpreted greater PQ reduction as an apparent block of electron transport at the PSII acceptor side.
- Taxon
- SoybeanGlycine maxt0
- Gene
- PSIIe0
- Outcome
- electron transport at the acceptor side of PSIIe0
- Qualifier
- blocked apparentlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“electron transport at the acceptor side of PSII was blocked apparently”
t0“Soybean Leaves”
Claim · model-written summary
The authors proposed blocked electron transport as the main factor reducing photosynthesis.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- photosynthesis reductione0
- Qualifier
- blocked electron transporte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“blocked electron transport may be the main factor of photosynthesis reduction”
t0“Soybean Leaves”
Claim · model-written summary
Antenna efficiency at open PSII reaction centers decreased in iron deficient soybean leaves.
- Taxon
- soybeanGlycine maxe0
- Treatment
- iron deficiente0
- Outcome
- antenna efficiency at open PSII reaction centers (Fv′/Fm′)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“antenna efficiency at open PSII reaction centers (Fv′/Fm′) decreased in iron deficient soybean leaves”
Claim · model-written summary
Energy used in photochemical reaction was suppressed in iron deficient soybean leaves.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Iron Deficiencyt0
- Outcome
- excited energy used in photochemical reactione0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“excited energy used in photochemical reaction was also suppressed”
t0“Iron Deficiency in Soybean Leaves”
Claim · model-written summary
Excitation energy dissipation was higher in iron deficient soybean leaves.
- Taxon
- soybeanGlycine maxe0
- Treatment
- iron deficiente0
- Outcome
- Excitation energy dissipatione0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Excitation energy dissipation was higher in iron deficient soybean leaves”
Claim · model-written summary
The authors proposed full triggering of the xanthophyll cycle in iron deficient soybean leaves.
- Taxon
- soybeanGlycine maxe0
- Outcome
- xanthophyll cycle may be fully triggerede0
- Qualifier
- iron deficiente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“xanthophyll cycle may be fully triggered in iron deficient soybean leaves”
The same questions in other papers
iron atom · physiology: photosynthesis · Glycine max (soybean)Positive and negative results
4 papers in the same direction as this paper · 2 in the opposite direction
This paper is about lacking the nutrient, so it counts the other way round here.
- no effect
- negative
- positive
3 papers more in this group
See all 7 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.