Abstract
Auxin transport affects a variety of important growth and developmental processes in plants, including the regulation of shoot and root branching. The asymmetrical localization of auxin influx and efflux carriers within the plasma membrane establishes the auxin gradient and facilitates its transport. REH1, a rice EIR1 (Arabidopsis ethylene insensitive root 1)-like gene, is a putative auxin efflux carrier. Phylogenetic analysis of 32 members of the PIN family, taken from across different species, showed that in terms of evolutionary relationship, OsPIN1 is closer to the PIN1 family than to the PIN2 family. It is, therefore, renamed as OsPIN1 in this study. OsPIN1 was expressed in the vascular tissues and root primordial in a manner similar to AtPIN1. Adventitious root emergence and development were significantly inhibited in the OsPIN1 RNA interference (RNAi) transgenic plants, which was similar to the phenotype of NPA (N-1-naphthylphalamic acid, an auxin-transport inhibitor)-treated wild-type plants. alpha-naphthylacetic acid (alpha-NAA) treatment was able to rescue the mutated phenotypes occurring in the RNAi plants. Overexpression or suppression of the OsPIN1 expression through a transgenic approach resulted in changes of tiller numbers and shoot/root ratio. Taken together, these data suggest that OsPIN1 plays an important role in auxin-dependent adventitious root emergence and tillering.
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Claims 6
Claim · model-written summary
Phylogenetic analysis placed OsPIN1 closer to PIN1 than PIN2.
- Taxon
- Rice
Oryza sativat0 - Gene
- OsPIN1e0
- Outcome
- closer to the PIN1 family than to the PIN2 familye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“OsPIN1 is closer to the PIN1 family than to the PIN2 family”
t0“Rice”
Claim · model-written summary
OsPIN1 expression occurred in vascular tissues and root primordia.
- Taxon
- RiceOryza sativat0
- Organ / stage
- vascular tissues and root primordiale0
- Gene
- OsPIN1e0
- Outcome
- expressed in the vascular tissues and root primordiale0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“OsPIN1 was expressed in the vascular tissues and root primordial in a manner similar to AtPIN1”
t0“Rice”
Claim · model-written summary
OsPIN1 RNA interference significantly inhibited adventitious root emergence and development.
- Taxon
- RiceOryza sativat0
- Treatment
- OsPIN1 RNA interference (RNAi)e0
- Gene
- OsPIN1e0
- Outcome
- Adventitious root emergence and developmente0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Adventitious root emergence and development were significantly inhibited in the OsPIN1 RNA interference (RNAi) transgenic plants”
t0“Rice”
Claim · model-written summary
alpha-NAA treatment rescued the RNAi phenotype.
- Taxon
- RiceOryza sativat0
- Treatment
- alpha-naphthylacetic acid (alpha-NAA) treatmente0
- Outcome
- mutated phenotypes occurring in the RNAi plantse0
- Direction
- rescuee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“alpha-naphthylacetic acid (alpha-NAA) treatment was able to rescue the mutated phenotypes occurring in the RNAi plants”
t0“Rice”
Claim · model-written summary
Changing OsPIN1 expression changed tiller number.
- Taxon
- RiceOryza sativat0
- Treatment
- Overexpression or suppression of the OsPIN1 expressione0
- Gene
- OsPIN1e0
- Outcome
- tiller numberse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Overexpression or suppression of the OsPIN1 expression through a transgenic approach resulted in changes of tiller numbers and shoot/root ratio”
t0“Rice”
Claim · model-written summary
Changing OsPIN1 expression changed shoot/root ratio.
- Taxon
- RiceOryza sativat0
- Treatment
- Overexpression or suppression of the OsPIN1 expressione0
- Gene
- OsPIN1e0
- Outcome
- shoot/root ratioe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Overexpression or suppression of the OsPIN1 expression through a transgenic approach resulted in changes of tiller numbers and shoot/root ratio”
t0“Rice”
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loss of function · growth · Oryza sativa (rice)Positive and negative results
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