Abstract
Abstract Iron deficiency symptoms which were induced in rice grown in purified sand at a normal manganese level (10 μM) with nitrate addition became more severe in the ferric citrate than in the Fe-EDTA treatment; no deficiency symptom was observed in the ammonium nitrate treatment with either source of iron. At this level of manganese (10 μM), plants grown in nitrate with either source of iron, compared to those grown in ammonium nitrate with the same source of iron as in the nitrate treatment, showed a decrease in dry matter production, chlorophyll content, and specific activities of catalase, succinic dehydrogenase, and aconitase enzymes. By lowering the manganese supply from 10 to 0.02 μM, the induced iron deficiency effects–decrease in dry matter production, chlorophyll content, and specific activities of catalase, succinic dehydrogenase, and aconitase were considerably mitigated in the nitrate treatment with both the iron sources. Whereas, by increasing the supply of manganese from 10 to 100 μM, there was an increase in the content of leaf manganese and iron, dry matter production and in the specific activities of peroxidase, succinic dehydrogenase, and malic dehydrogenase enzymes in all the treatments except for the leaf iron content in the ammonium nitrate-ferric citrate treatment, dry matter production in the nitrate ferric citrate treatment, succinic dehydrogenase activity in the ammonium nitrate-Fe-EDTA treatment, aconitase activity in the nitrate-Fe-EDTA treatment, chlorophyll content and malic dehydrogenase activity in the ammonium nitrate-Fe-EDTA treatment. Key Words: ironenzymesmanganese Oryza sativa L
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Claims 7
Claim · model-written summary
Under nitrate, ferric citrate caused more severe iron deficiency symptoms than Fe-EDTA.
- Taxon
- rice
Oryza sativae0 - Treatment
- ferric citratee0
- Outcome
- Iron deficiency symptomse0
- Direction
- more severee0
- Qualifier
- 10 μMe0
- Comparator
- Fe-EDTAe0
- Setting
- purified sande0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Iron deficiency symptoms which were induced in rice grown in purified sand at a normal manganese level (10 μM) with nitrate addition became more severe in the ferric citrate than in the Fe-EDTA treatment”
Claim · model-written summary
No deficiency symptoms occurred under ammonium nitrate with either iron source.
- Taxon
- Rice PlantsOryza sativat0
- Treatment
- ammonium nitratee0
- Outcome
- no deficiency symptome0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no deficiency symptom was observed in the ammonium nitrate treatment with either source of iron”
t0“Rice Plants”
Claim · model-written summary
At 10 μM manganese, nitrate reduced dry matter production relative to ammonium nitrate.
- Taxon
- Rice PlantsOryza sativat0
- Treatment
- nitratee0
- Outcome
- dry matter productione0
- Direction
- decreasee0
- Qualifier
- 10 μMe0
- Comparator
- ammonium nitratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At this level of manganese (10 μM), plants grown in nitrate with either source of iron, compared to those grown in ammonium nitrate with the same source of iron as in the nitrate treatment, showed a decrease in dry matter production, chlorophyll content, and specific activities of catalase, succinic dehydrogenase, and aconitase enzymes”
t0“Rice Plants”
Claim · model-written summary
At 10 μM manganese, nitrate reduced chlorophyll content relative to ammonium nitrate.
- Taxon
- Rice PlantsOryza sativat0
- Treatment
- nitratee0
- Outcome
- chlorophyll contente0
- Direction
- decreasee0
- Comparator
- ammonium nitratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At this level of manganese (10 μM), plants grown in nitrate with either source of iron, compared to those grown in ammonium nitrate with the same source of iron as in the nitrate treatment, showed a decrease in dry matter production, chlorophyll content, and specific activities of catalase, succinic dehydrogenase, and aconitase enzymes”
t0“Rice Plants”
Claim · model-written summary
At 10 μM manganese, nitrate reduced the specific activities of catalase, succinic dehydrogenase, and aconitase.
- Taxon
- Rice PlantsOryza sativat0
- Treatment
- nitratee0
- Gene
- catalase, succinic dehydrogenase, and aconitasee0
- Outcome
- specific activities of catalase, succinic dehydrogenase, and aconitase enzymese0
- Direction
- decreasee0
- Comparator
- ammonium nitratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At this level of manganese (10 μM), plants grown in nitrate with either source of iron, compared to those grown in ammonium nitrate with the same source of iron as in the nitrate treatment, showed a decrease in dry matter production, chlorophyll content, and specific activities of catalase, succinic dehydrogenase, and aconitase enzymes”
t0“Rice Plants”
Claim · model-written summary
Lowering manganese supply from 10 to 0.02 μM mitigated nitrate-induced losses in dry matter, chlorophyll, and enzyme activities.
- Taxon
- Rice PlantsOryza sativat0
- Treatment
- lowering the manganese supply from 10 to 0.02 μMe0
- Outcome
- induced iron deficiency effectse0
- Direction
- considerably mitigatede0
- Comparator
- 10 to 0.02 μMe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by lowering the manganese supply from 10 to 0.02 μM, the induced iron deficiency effects–decrease in dry matter production, chlorophyll content, and specific activities of catalase, succinic dehydrogenase, and aconitase were considerably mitigated in the nitrate treatment with both the iron sources”
t0“Rice Plants”
Claim · model-written summary
Raising manganese to 100 μM generally increased leaf manganese and iron content, dry matter, and several enzyme activities, subject to reported exceptions.
- Taxon
- Rice PlantsOryza sativat0
- Treatment
- increasing the supply of manganese from 10 to 100 μMe0
- Outcome
- content of leaf manganese and iron, dry matter production and in the specific activities of peroxidase, succinic dehydrogenase, and malic dehydrogenase enzymese0
- Direction
- increasee0
- Qualifier
- in all the treatments except for the leaf iron content in the ammonium nitrate-ferric citrate treatmente0
- Comparator
- 10 to 100 μMe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by increasing the supply of manganese from 10 to 100 μM, there was an increase in the content of leaf manganese and iron, dry matter production and in the specific activities of peroxidase, succinic dehydrogenase, and malic dehydrogenase enzymes in all the treatments except for the leaf iron content in the ammonium nitrate-ferric citrate treatment, dry matter production in the nitrate ferric citrate treatment, succinic dehydrogenase activity in the ammonium nitrate-Fe-EDTA treatment, aconitase activity in the nitrate-Fe-EDTA treatment, chlorophyll content and malic dehydrogenase activity in the ammonium nitrate-Fe-EDTA treatment”
t0“Rice Plants”
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