Abstract
The water content and osmotic potential (ψ2) of the different parts of the pea fruit have been measured during development of the seed in two lines near-isogenic except for the r locus. During the early development of both genotypes, the testa possessed a more negative ψ2 than either embryo, endosperm or pod while, at stages when liquid endosperm was present, the embryo always maintained ψ2, more negative than the endosperm. A clear effect of the r locus on water content and ψ2 was only observed in embryo tissue — wrinkled (rr) embryos possessing more water and maintaining a more negative ψ2 than round (RR) for most of the developmental period studied. The more negative ψ2 of wrinkled embryos correlated with their greater uptake of water in vivo. When cultured in vitro, the embryos of both genotypes showed maximum growth (fresh or dry weight) if 10 per cent sucrose was added to the medium (equivalent to about — 1.2 MPa). Round embryos, however, increased in weight more than wrinkled at all sucrose concentrations examined. Cultured embryos maintained a similar or more negative ψ2 than their surrounding medium; wrinkled more negative than round.
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Claims 9
Claim · model-written summary
Early in development, pea testa had more negative osmotic potential than embryo, endosperm or pod.
- Taxon
- Pisum sativum
Lathyrus oleraceust0 - Organ / stage
- testae0
- Outcome
- ψ2e0
- Direction
- more negativee0
- Comparator
- embryo, endosperm or pode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pisum sativum”
e0“the testa possessed a more negative ψ2 than either embryo, endosperm or pod”
Claim · model-written summary
When liquid endosperm was present, pea embryo osmotic potential stayed more negative than endosperm.
- Taxon
- Pisum sativumLathyrus oleraceust0
- Organ / stage
- embryoe0
- Outcome
- ψ2e0
- Direction
- more negativee0
- Comparator
- endosperme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pisum sativum”
e0“at stages when liquid endosperm was present, the embryo always maintained ψ2, more negative than the endosperm”
Claim · model-written summary
Wrinkled pea embryos had more water than round embryos for most of development.
- Taxon
- Pisum sativumLathyrus oleraceust0
- Material
- wrinkled (rr)e0
- Outcome
- watere0
- Direction
- moree0
- Comparator
- round (RR)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pisum sativum”
e0“wrinkled (rr) embryos possessing more water and maintaining a more negative ψ2 than round (RR) for most of the developmental period studied”
Claim · model-written summary
Wrinkled pea embryos had more negative osmotic potential than round embryos.
- Taxon
- Pisum sativumLathyrus oleraceust0
- Material
- wrinkled (rr)e0
- Outcome
- ψ2e0
- Direction
- more negativee0
- Comparator
- round (RR)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pisum sativum”
e0“wrinkled (rr) embryos possessing more water and maintaining a more negative ψ2 than round (RR) for most of the developmental period studied”
Claim · model-written summary
More negative osmotic potential of wrinkled pea embryos correlated with greater water uptake in vivo.
- Taxon
- Pisum sativumLathyrus oleraceust0
- Material
- wrinklede0
- Organ / stage
- embryose0
- Outcome
- uptake of watere0
- Direction
- greatere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pisum sativum”
e0“The more negative ψ2 of wrinkled embryos correlated with their greater uptake of water in vivo.”
Claim · model-written summary
Cultured pea embryos of both genotypes grew maximally with 10 per cent sucrose.
- Taxon
- Pisum sativumLathyrus oleraceust0
- Organ / stage
- embryose0
- Treatment
- 10 per cent sucrosee0
- Outcome
- growth (fresh or dry weight)e0
- Direction
- maximume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pisum sativum”
e0“embryos of both genotypes showed maximum growth (fresh or dry weight) if 10 per cent sucrose was added to the medium”
Claim · model-written summary
Round cultured pea embryos gained more weight than wrinkled embryos at all sucrose concentrations.
- Taxon
- Pisum sativumLathyrus oleraceust0
- Material
- Rounde0
- Outcome
- weighte0
- Direction
- moree0
- Comparator
- wrinklede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pisum sativum”
e0“Round embryos, however, increased in weight more than wrinkled at all sucrose concentrations examined.”
Claim · model-written summary
Cultured pea embryos maintained similar or more negative osmotic potential than the medium.
- Taxon
- Pisum sativumLathyrus oleraceust0
- Organ / stage
- embryose0
- Outcome
- ψ2e0
- Direction
- similar or more negativee0
- Comparator
- surrounding mediume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pisum sativum”
e0“Cultured embryos maintained a similar or more negative ψ2 than their surrounding medium”
Claim · model-written summary
Cultured wrinkled pea embryos had more negative osmotic potential than round ones.
- Taxon
- Pisum sativumLathyrus oleraceust0
- Material
- wrinklede0
- Outcome
- more negativee0
- Direction
- more negativee0
- Comparator
- rounde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pisum sativum”
e0“wrinkled more negative than round”
The same questions in other papers
sucrose · growth · Lathyrus oleraceus (pea)Positive and negative results
7 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- no effect
- no effect
7 papers more in this group
See all 11 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.