Abstract
Overexpression of a class 1 Hb (GLB1) protects Arabidopsis thaliana plants from the effects of severe hypoxia. Overexpression of the bifunctional symbiotic Hb (GLB1S) from Parasponia andersonii in A. thaliana also increases survival after hypoxia. Plants overexpressing the Hb 1 protein, mutated to have a low oxygen affinity, are as susceptible to hypoxia as WT plants, suggesting that the protection against hypoxia depends on the ability of the Hb to bind ligands, such as oxygen, with high affinity. A mild hypoxia pretreatment (5%) induces the Hb gene and increases the survival of plants after severe hypoxic treatment (0.1%). These results with Hb 1 show that plant Hbs have a role other than in nitrogen-fixing root nodules. Plants overexpressing the GLB1 protein show early vigorous growth in nonhypoxic conditions and are 50% larger in weight than the controls at 14 days. The constitutive expression of GLB1 also resulted in a reduced number of root hairs and increased number of laterals in the root system.
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Claims 8
Claim · model-written summary
Overexpression of class 1 hemoglobin GLB1 protected Arabidopsis thaliana from the effects of severe hypoxia.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianat0 - Treatment
- Overexpression of a class 1 Hb (GLB1)e0
- Outcome
- effects of severe hypoxiae0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Increased level of hemoglobin 1 enhances survival of hypoxic stress and promotes early growth in Arabidopsis thaliana”
e0“Overexpression of a class 1 Hb (GLB1) protects Arabidopsis thaliana plants from the effects of severe hypoxia”
Claim · model-written summary
Overexpression of symbiotic hemoglobin GLB1S from Parasponia andersonii increased survival after hypoxia in A. thaliana.
- Taxon
- A. thalianaArabidopsis thalianae1
- Treatment
- Overexpression of the bifunctional symbiotic Hb (GLB1S) from Parasponia andersoniie1
- Gene
- GLB1Se1
- Outcome
- survival after hypoxiae1
- Direction
- increasese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Increased level of hemoglobin 1 enhances survival of hypoxic stress and promotes early growth in Arabidopsis thaliana”
e1“Overexpression of the bifunctional symbiotic Hb (GLB1S) from Parasponia andersonii in A. thaliana also increases survival after hypoxia”
Claim · model-written summary
Hemoglobin 1 overexpressed with low oxygen affinity was as susceptible to hypoxia as wild-type plants.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- Plants overexpressing the Hb 1 protein, mutated to have a low oxygen affinitye2
- Gene
- Hb 1e2
- Outcome
- susceptible to hypoxiae2
- Direction
- as susceptiblee2
- Comparator
- WT plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Increased level of hemoglobin 1 enhances survival of hypoxic stress and promotes early growth in Arabidopsis thaliana”
e2“Plants overexpressing the Hb 1 protein, mutated to have a low oxygen affinity, are as susceptible to hypoxia as WT plants”
Claim · model-written summary
Mild hypoxia pretreatment at 5% induced the Hb gene in Arabidopsis.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- A mild hypoxia pretreatment (5%)e3
- Gene
- Hbe3
- Outcome
- Hb genee3
- Direction
- inducese3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Increased level of hemoglobin 1 enhances survival of hypoxic stress and promotes early growth in Arabidopsis thaliana”
e3“A mild hypoxia pretreatment (5%) induces the Hb gene and increases the survival of plants after severe hypoxic treatment (0.1%)”
Claim · model-written summary
Mild hypoxia pretreatment at 5% increased Arabidopsis survival after severe hypoxic treatment.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- A mild hypoxia pretreatment (5%)e3
- Outcome
- survival of plants after severe hypoxic treatmente3
- Direction
- increasese3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Increased level of hemoglobin 1 enhances survival of hypoxic stress and promotes early growth in Arabidopsis thaliana”
e3“A mild hypoxia pretreatment (5%) induces the Hb gene and increases the survival of plants after severe hypoxic treatment (0.1%)”
Claim · model-written summary
Plants overexpressing GLB1 showed early vigorous growth under nonhypoxic conditions and were 50% larger in weight than controls at 14 days.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- Plants overexpressing the GLB1 proteine4
- Outcome
- weighte4
- Direction
- largere4
- Value
- 50%e4
- Comparator
- the controlse4
- Setting
- nonhypoxic conditionse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Increased level of hemoglobin 1 enhances survival of hypoxic stress and promotes early growth in Arabidopsis thaliana”
e4“Plants overexpressing the GLB1 protein show early vigorous growth in nonhypoxic conditions and are 50% larger in weight than the controls at 14 days”
Claim · model-written summary
Constitutive GLB1 expression reduced the number of root hairs in Arabidopsis.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- constitutive expression of GLB1e5
- Outcome
- number of root hairse5
- Direction
- reducede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Increased level of hemoglobin 1 enhances survival of hypoxic stress and promotes early growth in Arabidopsis thaliana”
e5“The constitutive expression of GLB1 also resulted in a reduced number of root hairs and increased number of laterals in the root system”
Claim · model-written summary
Constitutive GLB1 expression increased the number of lateral roots in the root system of Arabidopsis.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Organ / stage
- root systeme5
- Treatment
- constitutive expression of GLB1e5
- Outcome
- number of lateralse5
- Direction
- increasede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Increased level of hemoglobin 1 enhances survival of hypoxic stress and promotes early growth in Arabidopsis thaliana”
e5“The constitutive expression of GLB1 also resulted in a reduced number of root hairs and increased number of laterals in the root system”
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- no effect
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5 papers more in this group
See all 9 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.