Abstract
BACKGROUND: The root system plays a major role in plant growth and development and root system architecture is reported to be the main trait related to plant adaptation to drought. However, phenotyping root systems in situ is not suited to high-throughput methods, leading to the development of non-destructive methods for evaluations in more or less controlled root environments. This study used a root phenotyping platform with a panel of 20 japonica rice accessions in order to: (i) assess their genetic diversity for a set of structural and morphological root traits and classify the different types; (ii) analyze the plastic response of their root system to a water deficit at reproductive phase and (iii) explore the ability of the platform for high-throughput phenotyping of root structure and morphology. RESULTS: High variability for the studied root traits was found in the reduced set of accessions. Using eight selected traits under irrigated conditions, five root clusters were found that differed in root thickness, branching index and the pattern of fine and thick root distribution along the profile. When water deficit occurred at reproductive phase, some accessions significantly reduced root growth compared to the irrigated treatment, while others stimulated it. It was found that root cluster, as defined under irrigated conditions, could not predict the plastic response of roots under drought. CONCLUSIONS: This study revealed the possibility of reconstructing the structure of root systems from scanned images. It was thus possible to significantly class root systems according to simple structural traits, opening up the way for using such a platform for medium to high-throughput phenotyping. The study also highlighted the uncoupling between root structures under non-limiting water conditions and their response to drought.
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Claims 6
Claim · model-written summary
High variability for the studied root traits was found among the japonica rice accessions.
- Taxon
- Japonica Rice
_by_Augustus_Binu.jpg?width=60)
Oryza sativa Japonica Groupt0 - Outcome
- variability for the studied root traitse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_by_Augustus_Binu.jpg?width=500)
Verbatim
t0“Japonica Rice Accessions”
e1“High variability for the studied root traits was found in the reduced set of accessions”
Claim · model-written summary
Under irrigated conditions, five root clusters differed in root thickness, branching index and the pattern of fine and thick root distribution along the profile.
- Taxon
- Japonica RiceOryza sativa Japonica Groupt0
- Outcome
- root thickness, branching index and the pattern of fine and thick root distribution along the profilee2
- Value
- fivee2
- Qualifier
- under irrigated conditionse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Japonica Rice Accessions”
e2“Using eight selected traits under irrigated conditions, five root clusters were found that differed in root thickness, branching index and the pattern of fine and thick root distribution along the profile”
Claim · model-written summary
Water deficit at reproductive phase significantly reduced root growth in some accessions compared with the irrigated treatment.
- Taxon
- Japonica RiceOryza sativa Japonica Groupt0
- Treatment
- water deficit occurred at reproductive phasee3
- Outcome
- root growthe3
- Direction
- significantly reducede3
- Comparator
- irrigated treatmente3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Japonica Rice Accessions”
e3“When water deficit occurred at reproductive phase, some accessions significantly reduced root growth compared to the irrigated treatment”
Claim · model-written summary
Water deficit at reproductive phase stimulated root growth in other accessions compared with the irrigated treatment.
- Taxon
- Japonica RiceOryza sativa Japonica Groupt0
- Treatment
- water deficit occurred at reproductive phasee4
- Outcome
- root growthe4
- Direction
- stimulatede4
- Comparator
- irrigated treatmente4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Japonica Rice Accessions”
e4“When water deficit occurred at reproductive phase, some accessions significantly reduced root growth compared to the irrigated treatment, while others stimulated it”
Claim · model-written summary
Root cluster defined under irrigated conditions could not predict the plastic response of roots under drought.
- Taxon
- Japonica RiceOryza sativa Japonica Groupt0
- Treatment
- droughte5
- Outcome
- plastic response of rootse5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Japonica Rice Accessions”
e5“It was found that root cluster, as defined under irrigated conditions, could not predict the plastic response of roots under drought”
Claim · model-written summary
Scanned images made it possible to reconstruct the structure of root systems.
- Taxon
- Japonica RiceOryza sativa Japonica Groupt0
- Outcome
- reconstructing the structure of root systems from scanned imagese6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Japonica Rice Accessions”
e6“This study revealed the possibility of reconstructing the structure of root systems from scanned images”
The same questions in other papers
drought · growth · Oryza sativa (rice)Positive and negative results
97 papers in the same direction as this paper · 182 in the opposite direction · 2 reporting no difference from an alternative
- negative
- negative
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