Abstract
BACKGROUND AND AIMS: Phosphorus commonly limits crop yield and is frequently applied as fertilizer; however, supplies of quality rock phosphate for fertilizer production are diminishing. Plants have evolved many mechanisms to increase their P-fertilizer use efficiency, and an understanding of these traits could result in improved long-term sustainability of agriculture. Here a mutant population is utilized to assess the impact of root hair length on P acquisition and yield under P-deficient conditions alone or when combined with drought. METHODS: Mutants with various root hair phenotypes were grown in the glasshouse in pots filled with soil representing sufficient and deficient P treatments and, in one experiment, a range of water availability was also imposed. Plants were variously harvested at 7 d, 8 weeks and 14 weeks, and variables including root hair length, rhizosheath weight, biomass, P accumulation and yield were measured. KEY RESULTS: The results confirmed the robustness of the root hair phenotypes in soils and their relationship to rhizosheath production. The data demonstrated that root hair length is important for shoot P accumulation and biomass, while only the presence of root hairs is critical for yield. Root hair presence was also critical for tolerance to extreme combined P deficit and drought stress, with genotypes with no root hairs suffering extreme growth retardation in comparison with those with root hairs. CONCLUSIONS: The results suggest that although root hair length is not important for maintaining yield, the presence of root hairs is implicit to sustainable yield of barley under P-deficient conditions and when combined with extreme drought. Root hairs are a trait that should be maintained in future germplasm.
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Claims 6
Claim · model-written summary
Root hair length is important for shoot P accumulation and biomass in barley
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaret0 - Treatment
- root hair lengthe0
- Outcome
- shoot P accumulation and biomasse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“barley (Hordeum vulgare)”
e0“root hair length is important for shoot P accumulation and biomass”
Claim · model-written summary
The presence of root hairs is critical for barley yield
- Taxon
- barleyHordeum vulgaret0
- Treatment
- the presence of root hairse1
- Outcome
- yielde1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley (Hordeum vulgare)”
e1“only the presence of root hairs is critical for yield”
Claim · model-written summary
Barley genotypes without root hairs suffer greater growth retardation than those with root hairs under combined P deficit and drought
- Taxon
- barleyHordeum vulgaret0
- Material
- genotypes with no root hairse2
- Treatment
- extreme combined P deficit and drought stresse2
- Outcome
- growth retardatione2
- Direction
- decreaseinferrede2
- Qualifier
- tolerance to extreme combined P deficit and drought stresse2
- Comparator
- those with root hairse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley (Hordeum vulgare)”
e2“Root hair presence was also critical for tolerance to extreme combined P deficit and drought stress, with genotypes with no root hairs suffering extreme growth retardation in comparison with those with root hairs”
Claim · model-written summary
Root hair length is not important for maintaining barley yield
- Taxon
- barleyHordeum vulgaret0
- Treatment
- root hair lengthe3
- Outcome
- maintaining yielde3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley (Hordeum vulgare)”
e3“although root hair length is not important for maintaining yield”
Claim · model-written summary
Root hair phenotypes are robust in soils and related to rhizosheath production in barley
- Taxon
- barleyHordeum vulgaret0
- Outcome
- relationship to rhizosheath productione4
- Qualifier
- robustness of the root hair phenotypes in soilse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley (Hordeum vulgare)”
e4“The results confirmed the robustness of the root hair phenotypes in soils and their relationship to rhizosheath production”
Claim · model-written summary
Root hairs should be maintained in future barley germplasm
- Taxon
- barleyHordeum vulgaret0
- Outcome
- maintained in future germplasme5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley (Hordeum vulgare)”
e5“Root hairs are a trait that should be maintained in future germplasm”
The same questions in other papers
drought · growth · Hordeum vulgare (barley)Positive and negative results
14 papers in the same direction as this paper · 89 in the opposite direction · 1 reporting no difference from an alternative
- positive
- negative
- negative
101 papers more in this group
See all 105 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.