Abstract
Pea plants ( Pisum sativum L.) possessing the slender phenotype (conferred by the gene combination la cry s ) have extremely long, thin internodes and are phenotypically similar to dwarf plants (possessing genes La and/or Cry ) that have been treated with a non‐limiting dose of gibberellin (GA 3 ). In contrast to tall and dwarf plants, slender plants are virtually insensitive to treatment with AMO 1618, PP333 or GA 3 and addition of the “gibberellin‐less” mutant gene na does not alter the phenotype of slender plants. Na slender segregates possessed lower levels of gibberellin‐like substances than comparable dwarf segregates when extracts from shoots were assayed using the lettuce hypocotyl or rice seedling bioassays. In addition, na slenders possessed little or no gibberellin‐like activity even though they possessed a slender phenotype. Thus the gene combination la cry s causes slender plants to respond as if they are saturated with gibberellins for growth. In addition, the gene combinations la cry s and le la cry c (allele cry c is less extreme in effect than cry s ) are shown to be almost completely epistatic to the alleles at the na locus. All these results suggest that gibberellin levels are not important in determining the internode length of slender peas (genotype la cry s ). The possible mechanisms by which this could occur are discussed.
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Claims 11
Claim · model-written summary
Slender pea plants have extremely long, thin internodes.
- Taxon
- Pisum sativum L.
Lathyrus oleraceuse0 - Material
- slender phenotypee0
- Gene
- la cry se0
- Outcome
- extremely long, thin internodese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pea plants ( Pisum sativum L.) possessing the slender phenotype (conferred by the gene combination la cry s ) have extremely long, thin internodes”
Claim · model-written summary
Slender peas resemble gibberellin-treated dwarf plants phenotypically.
LathyrusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“are phenotypically similar to dwarf plants (possessing genes La and/or Cry ) that have been treated with a non‐limiting dose of gibberellin (GA 3 )”
t0“Pisum”
Claim · model-written summary
Slender plants are virtually insensitive to AMO 1618.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“slender plants are virtually insensitive to treatment with AMO 1618, PP333 or GA 3”
t0“Pisum”
Claim · model-written summary
Slender plants are virtually insensitive to PP333.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“slender plants are virtually insensitive to treatment with AMO 1618, PP333 or GA 3”
t0“Pisum”
Claim · model-written summary
Slender plants are virtually insensitive to GA 3.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“slender plants are virtually insensitive to treatment with AMO 1618, PP333 or GA 3”
t0“Pisum”
Claim · model-written summary
Adding na does not alter the slender phenotype.
- Treatment
- addition of the “gibberellin‐less” mutant gene nae0
- Gene
- gene nae0
- Outcome
- phenotype of slender plantse0
- Direction
- does not altere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“addition of the “gibberellin‐less” mutant gene na does not alter the phenotype of slender plants”
t0“Pisum”
Claim · model-written summary
Na slender segregates had lower gibberellin-like substance levels than dwarf segregates.
- Material
- Na slender segregatese0
- Outcome
- levels of gibberellin‐like substancese0
- Direction
- lowere0
- Comparator
- comparable dwarf segregatese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Na slender segregates possessed lower levels of gibberellin‐like substances than comparable dwarf segregates”
t0“Pisum”
Claim · model-written summary
na slenders possessed little or no gibberellin-like activity despite a slender phenotype.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“na slenders possessed little or no gibberellin‐like activity even though they possessed a slender phenotype”
t0“Pisum”
Claim · model-written summary
The la cry s combination makes slender plants respond as though saturated with gibberellins.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the gene combination la cry s causes slender plants to respond as if they are saturated with gibberellins for growth”
t0“Pisum”
Claim · model-written summary
The la cry s and le la cry c gene combinations are almost completely epistatic to na alleles.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the gene combinations la cry s and le la cry c (allele cry c is less extreme in effect than cry s ) are shown to be almost completely epistatic to the alleles at the na locus”
t0“Pisum”
Claim · model-written summary
The authors infer gibberellin levels do not determine internode length in slender peas.
- Gene
- la cry se0
- Outcome
- internode length of slender pease0
- Qualifier
- gibberellin levels are not importante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“gibberellin levels are not important in determining the internode length of slender peas (genotype la cry s )”
t0“Pisum”