Abstract
Plants employ two distinct strategies to obtain iron (Fe) from the soil. In Strategy I but not Strategy II plants, Fe limitation invokes ethylene production which regulates Fe deficiency responses. Oryza sativa (rice) is the only graminaceous plant described that possesses a Strategy I-like system for iron uptake as well as the classic Strategy II system. Ethylene production of rice roots was significantly increased when grown under Fe-depleted conditions. Moreover, 1-aminocyclopropane-1-carboxylic acid (ACC) treatment, a precursor of ethylene, conferred tolerance to Fe deficiency in rice by increasing internal Fe availability. Gene expression analysis of rice iron-regulated bHLH transcription factor OsIRO2, nicotianamine synthases 1 and 2 (NAS1 and NAS2), yellow-stripe like transporter 15 (YSL15) and iron-regulated transporter (IRT1) indicated that ethylene caused an increase in transcript abundance of both Fe (II) and Fe (III)-phytosiderophore uptake systems. RNA interference of OsIRO2 in transgenic rice showed that ethylene acted via this transcription factor to induce the expression of OsNAS1, OsNAS2, OsYSL15, and OsIRT1. By contrast, in Hordeum vulgare L. (barley), no ethylene production or ethylene-mediated effects of Fe response could be detected. In conclusion, Fe-limiting conditions increased ethylene production and signalling in rice, which is novel in Strategy II plant species.
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Claims 10
Claim · model-written summary
Iron depletion significantly increased ethylene production in rice roots.
- Taxon
- rice
Oryza sativae0 - Organ / stage
- rootse0
- Treatment
- Fe-depleted conditionse0
- Outcome
- Ethylene productione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ethylene production of rice roots was significantly increased when grown under Fe-depleted conditions”
Claim · model-written summary
ACC treatment conferred iron deficiency tolerance in rice.
- Taxon
- riceOryza sativae0
- Treatment
- 1-aminocyclopropane-1-carboxylic acid (ACC) treatmente0
- Outcome
- tolerance to Fe deficiencye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“1-aminocyclopropane-1-carboxylic acid (ACC) treatment, a precursor of ethylene, conferred tolerance to Fe deficiency in rice by increasing internal Fe availability”
Claim · model-written summary
ACC treatment increased internal iron availability in rice.
- Taxon
- riceOryza sativae0
- Treatment
- 1-aminocyclopropane-1-carboxylic acid (ACC) treatmente0
- Outcome
- internal Fe availabilitye0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“1-aminocyclopropane-1-carboxylic acid (ACC) treatment, a precursor of ethylene, conferred tolerance to Fe deficiency in rice by increasing internal Fe availability”
Claim · model-written summary
Ethylene increased transcripts of rice iron uptake systems.
- Taxon
- riceOryza sativae0
- Treatment
- ethylenee0
- Outcome
- transcript abundance of both Fe (II) and Fe (III)-phytosiderophore uptake systemse0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gene expression analysis of rice iron-regulated bHLH transcription factor OsIRO2, nicotianamine synthases 1 and 2 (NAS1 and NAS2), yellow-stripe like transporter 15 (YSL15) and iron-regulated transporter (IRT1) indicated that ethylene caused an increase in transcript abundance of both Fe (II) and Fe (III)-phytosiderophore uptake systems”
Claim · model-written summary
RNA interference of OsIRO2 showed ethylene acted through OsIRO2 to induce OsNAS1 expression.
- Taxon
- riceOryza sativae0
- Gene
- OsIRO2e0
- Outcome
- expression of OsNAS1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“RNA interference of OsIRO2 in transgenic rice showed that ethylene acted via this transcription factor to induce the expression of OsNAS1, OsNAS2, OsYSL15, and OsIRT1”
Claim · model-written summary
RNA interference of OsIRO2 showed ethylene acted through OsIRO2 to induce OsNAS2 expression.
- Taxon
- riceOryza sativae0
- Gene
- OsIRO2e0
- Outcome
- OsNAS2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“RNA interference of OsIRO2 in transgenic rice showed that ethylene acted via this transcription factor to induce the expression of OsNAS1, OsNAS2, OsYSL15, and OsIRT1”
Claim · model-written summary
RNA interference of OsIRO2 showed ethylene acted through OsIRO2 to induce OsYSL15 expression.
- Taxon
- riceOryza sativae0
- Gene
- OsIRO2e0
- Outcome
- OsYSL15e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“RNA interference of OsIRO2 in transgenic rice showed that ethylene acted via this transcription factor to induce the expression of OsNAS1, OsNAS2, OsYSL15, and OsIRT1”
Claim · model-written summary
RNA interference of OsIRO2 showed ethylene acted through OsIRO2 to induce OsIRT1 expression.
- Taxon
- riceOryza sativae0
- Gene
- OsIRO2e0
- Outcome
- OsIRT1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“RNA interference of OsIRO2 in transgenic rice showed that ethylene acted via this transcription factor to induce the expression of OsNAS1, OsNAS2, OsYSL15, and OsIRT1”
Claim · model-written summary
Barley showed no detectable ethylene production in the iron response.
- Taxon
- barley
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Hordeum vulgaree0 - Outcome
- ethylene productione0
- Direction
- no ethylene productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“in Hordeum vulgare L. (barley), no ethylene production or ethylene-mediated effects of Fe response could be detected”
Claim · model-written summary
Barley showed no detectable ethylene mediated iron response.
- Taxon
- barleyHordeum vulgaree0
- Outcome
- ethylene-mediated effects of Fe responsee0
- Direction
- no ethylene production or ethylene-mediated effectse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in Hordeum vulgare L. (barley), no ethylene production or ethylene-mediated effects of Fe response could be detected”
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See all 8 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.