Abstract
The comparative study of shoot and root growth was carried out, and the level of ABA therein determined in the mutant af and tl and wild-type isogenic lines of pea. The recessive af mutation transformed the leaflets into tendrils, and the tl mutation transformed the tendrils into leaflets. These mutations did not affect the length and number of internodes. In all plants, the level of ABA in the leaves was 3–10 times greater than in the roots, and in the course of vegetative growth it rose in both organs. An increase in the shoot area of tl mutant did not change the dry weight of underground and above-ground parts; therefore, the ratio shoot/root in the mutant was identical to that in the wild-type plants. The maintenance of shoot dry weight in the tl mutant at the level of wild-type plant while its area considerably increased was accounted for by a decrease in the thickness of the leaflet and stipule blades. The level of ABA in the stipules of mutant plants was greater than in the wild-type plants. A decrease in the shoot area in the af mutant brought about a decline in its dry weight; however, the ratio root/shoot was maintained at the wild-type level due to a reduced accumulation of dry weight by the root. The level of ABA in the roots of the af mutant was twice greater than in the leafy forms. ABA was assumed to participate in the control over the root growth exerted by the shoot. The absence of leaflets in the af plants was partially compensated for by expanding stipules. The level of ABA therein was three times higher than in the plants of wild type and comparable with the level in the leaflets of the tl mutant and in the wild-type plants. The role of ABA in the growth and final size of leaf blades is discussed.
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Claims 11
Claim · model-written summary
The af and tl mutations did not affect the length and number of internodes in pea.
- Taxon
- pea
Lathyrus oleraceust0 - Material
- af and tlt0
- Outcome
- length and number of internodese1
- Direction
- did not affecte1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pea mutants af and tl”
e1“These mutations did not affect the length and number of internodes”
Claim · model-written summary
In all pea plants the ABA level in leaves was 3-10 times greater than in roots.
- Taxon
- peaLathyrus oleraceust0
- Organ / stage
- leavese1
- Outcome
- level of ABAe1
- Direction
- greatere1
- Value
- 3–10 timese1
- Comparator
- rootse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pea mutants af and tl”
e1“the level of ABA in the leaves was 3–10 times greater than in the roots”
Claim · model-written summary
The ABA level rose in both leaves and roots in the course of vegetative growth.
- Taxon
- peaLathyrus oleraceust0
- Organ / stage
- both organse1
- Outcome
- it rosee1
- Direction
- rosee1
- Qualifier
- in the course of vegetative growthe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pea mutants af and tl”
e1“in the course of vegetative growth it rose in both organs”
Claim · model-written summary
The increase in shoot area of the tl mutant did not change the dry weight of underground and above-ground parts.
- Taxon
- peaLathyrus oleraceust0
- Material
- tl mutante1
- Outcome
- dry weight of underground and above-ground partse1
- Direction
- did not changee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pea mutants af and tl”
e1“An increase in the shoot area of tl mutant did not change the dry weight of underground and above-ground parts”
Claim · model-written summary
The shoot/root ratio in the tl mutant was identical to that in wild-type pea plants.
- Taxon
- peaLathyrus oleraceust0
- Outcome
- ratio shoot/roote1
- Direction
- identicale1
- Comparator
- wild-type plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pea mutants af and tl”
e1“the ratio shoot/root in the mutant was identical to that in the wild-type plants”
Claim · model-written summary
Maintenance of shoot dry weight in the tl mutant at the wild-type level despite larger leaf area was accounted for by a decrease in thickness of leaflet and stipule blades.
- Taxon
- peaLathyrus oleraceust0
- Material
- tl mutante1
- Organ / stage
- leaflet and stipule bladese1
- Outcome
- maintenance of shoot dry weighte1
- Qualifier
- decrease in the thickness of the leaflet and stipule bladese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pea mutants af and tl”
e1“The maintenance of shoot dry weight in the tl mutant at the level of wild-type plant while its area considerably increased was accounted for by a decrease in the thickness of the leaflet and stipule blades”
Claim · model-written summary
The ABA level in the stipules of mutant plants was greater than in wild-type plants.
- Taxon
- peaLathyrus oleraceust0
- Organ / stage
- stipulese1
- Outcome
- level of ABAe1
- Direction
- greatere1
- Comparator
- wild-type plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pea mutants af and tl”
e1“The level of ABA in the stipules of mutant plants was greater than in the wild-type plants”
Claim · model-written summary
A decrease in shoot area in the af mutant brought about a decline in its dry weight.
- Taxon
- peaLathyrus oleraceust0
- Material
- af mutante1
- Outcome
- dry weighte1
- Direction
- declinee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pea mutants af and tl”
e1“A decrease in the shoot area in the af mutant brought about a decline in its dry weight”
Claim · model-written summary
The ABA level in the roots of the af mutant was twice that in the leafy forms.
- Taxon
- peaLathyrus oleraceust0
- Material
- af mutante1
- Organ / stage
- rootse1
- Outcome
- level of ABAe1
- Direction
- greatere1
- Value
- twicee1
- Comparator
- leafy formse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pea mutants af and tl”
e1“The level of ABA in the roots of the af mutant was twice greater than in the leafy forms”
Claim · model-written summary
ABA was assumed to participate in the control over root growth exerted by the shoot.
- Taxon
- peaLathyrus oleraceust0
- Organ / stage
- roote1
- Compound
- ABAe1
- Outcome
- root growthe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pea mutants af and tl”
e1“ABA was assumed to participate in the control over the root growth exerted by the shoot”
Claim · model-written summary
The ABA level in the stipules of af plants was three times higher than in wild-type plants.
- Taxon
- peaLathyrus oleraceust0
- Organ / stage
- stipulese1
- Outcome
- level of ABAe1
- Direction
- highere1
- Value
- three timese1
- Comparator
- plants of wild typee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pea mutants af and tl”
e1“expanding stipules. The level of ABA therein was three times higher than in the plants of wild type”