Abstract
Flooded plant roots commonly form aerenchyma, which allows gas diffusion between shoots and roots. The programmed cell death involved in this induced aerenchyma formation is controlled by the plant hormone ethylene, as has been shown for maize (Zea mays). However, the role of ethylene is uncertain in wetland species that form constitutive aerenchyma (also under nonflooded conditions). The aim of this study is to shed light on the involvement of ethylene in constitutive aerenchyma formation in Juncus effusus. Plants of J. effusus and maize were treated with ethylene and inhibitors of ethylene action to determine the consequences for aerenchyma formation. Neither treatment with high ethylene concentrations nor with ethylene inhibitors resulted in changes in root aerenchyma in J. effusus. By contrast, ethylene increased aerenchyma development in maize unless ethylene action inhibitors were applied simultaneously. Similarly, root elongation was insensitive to ethylene treatment in J. effusus, but was affected negatively in maize. The data show that aerenchyma in J. effusus is highly constitutive and, in contrast to the inducible aerenchyma in maize, is not obviously controlled by ethylene.
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Claims 5
Claim · model-written summary
Neither high ethylene concentrations nor ethylene inhibitors changed root aerenchyma in Juncus effusus.
- Taxon
- J. effusus
Juncus effususe1 - Organ / stage
- roote1
- Treatment
- high ethylene concentrationse1
- Outcome
- root aerenchymae1
- Direction
- no_changeinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Neither treatment with high ethylene concentrations nor with ethylene inhibitors resulted in changes in root aerenchyma in J. effusus”
Claim · model-written summary
Ethylene increased aerenchyma development in maize unless ethylene action inhibitors were applied simultaneously.
- Treatment
- ethylenee2
- Outcome
- aerenchyma developmente2
- Direction
- increasede2
- Qualifier
- unless ethylene action inhibitors were applied simultaneouslye2
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“By contrast, ethylene increased aerenchyma development in maize unless ethylene action inhibitors were applied simultaneously”
Claim · model-written summary
Ethylene affected root elongation negatively in maize.
- Organ / stage
- roote3
- Treatment
- ethylene treatmente3
- Outcome
- root elongatione3
- Direction
- affected negativelye3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“root elongation was insensitive to ethylene treatment in J. effusus, but was affected negatively in maize”
Claim · model-written summary
Root elongation in Juncus effusus was insensitive to ethylene treatment.
- Taxon
- J. effususJuncus effususe3
- Organ / stage
- roote3
- Treatment
- ethylene treatmente3
- Outcome
- root elongatione3
- Direction
- no_changeinferrede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“root elongation was insensitive to ethylene treatment in J. effusus, but was affected negatively in maize”
Claim · model-written summary
Aerenchyma in Juncus effusus is highly constitutive and not obviously controlled by ethylene.
- Taxon
- J. effususJuncus effususe4
- Outcome
- aerenchymae4
- Qualifier
- not obviously controlled by ethylenee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“The data show that aerenchyma in J. effusus is highly constitutive and, in contrast to the inducible aerenchyma in maize, is not obviously controlled by ethylene”
The same questions in other papers
ethene · growth · Zea mays (maize)Positive and negative results
5 papers in the same direction as this paper · 10 in the opposite direction
- positive
- positive
- positive
12 papers more in this group
See all 16 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.