Abstract
Soil compaction represents a major agronomic challenge, inhibiting root elongation and impacting crop yields. Roots use ethylene to sense soil compaction as the restricted air space causes this gaseous signal to accumulate around root tips. Ethylene inhibits root elongation and promotes radial expansion in compacted soil, but its mechanistic basis remains unclear. Here, we report that ethylene promotes abscisic acid (ABA) biosynthesis and cortical cell radial expansion. Rice mutants of ABA biosynthetic genes had attenuated cortical cell radial expansion in compacted soil, leading to better penetration. Soil compaction-induced ethylene also up-regulates the auxin biosynthesis gene OsYUC8 . Mutants lacking OsYUC8 are better able to penetrate compacted soil. The auxin influx transporter OsAUX1 is also required to mobilize auxin from the root tip to the elongation zone during a root compaction response. Moreover, osaux1 mutants penetrate compacted soil better than the wild-type roots and do not exhibit cortical cell radial expansion. We conclude that ethylene uses auxin and ABA as downstream signals to modify rice root cell elongation and radial expansion, causing root tips to swell and reducing their ability to penetrate compacted soil.
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Claims 9
Claim · model-written summary
Ethylene promoted ABA biosynthesis and cortical cell radial expansion in rice roots.
- Taxon
- rice
Oryza sativae1 - Organ / stage
- cortical celle0
- Treatment
- ethylenee0
- Outcome
- abscisic acid (ABA) biosynthesis and cortical cell radial expansione0
- Direction
- promotese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ethylene promotes abscisic acid (ABA) biosynthesis and cortical cell radial expansion”
e1“rice”
Claim · model-written summary
Rice ABA biosynthetic mutants had attenuated cortical cell radial expansion in compacted soil.
- Taxon
- RiceOryza sativae0
- Material
- Rice mutants of ABA biosynthetic genese0
- Outcome
- cortical cell radial expansione0
- Direction
- attenuatede0
- Setting
- compacted soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice mutants of ABA biosynthetic genes had attenuated cortical cell radial expansion in compacted soil”
Claim · model-written summary
Rice ABA biosynthetic mutants penetrated compacted soil better.
- Taxon
- RiceOryza sativae0
- Material
- Rice mutants of ABA biosynthetic genese0
- Outcome
- penetratione0
- Direction
- bettere0
- Setting
- compacted soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice mutants of ABA biosynthetic genes had attenuated cortical cell radial expansion in compacted soil, leading to better penetration”
Claim · model-written summary
Soil compaction-induced ethylene up-regulated OsYUC8 in rice.
- Taxon
- riceOryza sativae1
- Treatment
- Soil compaction-induced ethylenee0
- Gene
- OsYUC8e0
- Outcome
- auxin biosynthesis gene OsYUC8e0
- Direction
- up-regulatese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil compaction-induced ethylene also up-regulates the auxin biosynthesis gene OsYUC8”
e1“rice”
Claim · model-written summary
Rice mutants lacking OsYUC8 penetrated compacted soil better.
- Taxon
- riceOryza sativae1
- Material
- Mutants lacking OsYUC8e0
- Gene
- OsYUC8e0
- Outcome
- penetrate compacted soile0
- Direction
- bettere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mutants lacking OsYUC8 are better able to penetrate compacted soil”
e1“rice”
Claim · model-written summary
OsAUX1 was required to mobilize auxin from the root tip to the elongation zone during rice root compaction response.
- Taxon
- riceOryza sativae1
- Organ / stage
- root tipe0
- Gene
- OsAUX1e0
- Outcome
- mobilize auxin from the root tip to the elongation zonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The auxin influx transporter OsAUX1 is also required to mobilize auxin from the root tip to the elongation zone during a root compaction response”
e1“rice”
Claim · model-written summary
Rice osaux1 mutants penetrated compacted soil better than wild-type roots.
- Taxon
- riceOryza sativae1
- Material
- osaux1 mutantse0
- Outcome
- penetrate compacted soile0
- Direction
- bettere0
- Comparator
- wild-type rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“osaux1 mutants penetrate compacted soil better than the wild-type roots”
e1“rice”
Claim · model-written summary
Rice osaux1 mutants did not exhibit cortical cell radial expansion.
- Taxon
- riceOryza sativae1
- Material
- osaux1 mutantse0
- Outcome
- do not exhibit cortical cell radial expansione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“osaux1 mutants penetrate compacted soil better than the wild-type roots and do not exhibit cortical cell radial expansion”
e1“rice”
Claim · model-written summary
The authors conclude that ethylene uses auxin and ABA to alter rice root growth, causing swelling and reduced penetration of compacted soil.
- Taxon
- riceOryza sativae1
- Organ / stage
- root tipse0
- Treatment
- ethylenee0
- Compound
- auxin and ABAe0
- Outcome
- ability to penetrate compacted soile0
- Direction
- reducinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ethylene uses auxin and ABA as downstream signals to modify rice root cell elongation and radial expansion, causing root tips to swell and reducing their ability to penetrate compacted soil”
e1“rice”
The same questions in other papers
ethene · physiology: hormones · Oryza sativa (rice)Positive and negative results
1 paper in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
1 paper more in this group
See all 5 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.