Abstract
W eaver , G erald M., and L. F redric H ough . (Rutgers, The State Univ., New Brunswick, N. J.) Seedling growth studies of early‐ripening peaches. I. Interrelationship between embryo maturity, growth substances and seedling growth. Amer. Jour. Bot. 46(10): 718–724. Illus. 1959.—Peach fruits of ‘Raritan Rose’ were harvested 75, 83, 91, 99 and 107 days after full bloom. Embryos were excised, and cultured on artificial media. Growth responses following 8 wk. cold treatment varied considerably with embryo maturity. No correlation existed between seedling survival and the initial responses of shoots. Root growth of 83‐day embryos exceeded that of all other stages of maturity. This was reflected in maximum seedling survival and vigor. Initial shoot growth was greatest from embryos harvested at 91 days and at maturity (107 days), but all shoots developed into rosettes which may expand slightly or develop normally from axillary buds. Bioassays of growth substances suggest a strong correlation between early shoot development and auxin concentration. Root growth‐responses appeared to be correlated with a promotor‐inhibitor balance. The results of wheat coleoptile assays of embryo extracts chromatographed in an isopropanol: ammonia: water solvent (8:1:1) suggest the presence of three growth promotors, in greatest concentration at Rf 0.70, but also at Rf values 0.10 and 0.30. Two growth inhibitors were present in embryo tissue at Rf values 0.27 and 0.96, the former decreasing in concentration with increasing embryo maturity.
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Claims 11
Claim · model-written summary
Peach growth responses after cold treatment varied with embryo maturity.
- Taxon
- Peach
Prunus persicat0 - Organ / stage
- embryoe0
- Treatment
- 8 wk. cold treatmente0
- Outcome
- Growth responsese0
- Direction
- varied considerablye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth responses following 8 wk. cold treatment varied considerably with embryo maturity”
t0“Peach”
Claim · model-written summary
Seedling survival had no correlation with initial shoot responses.
- Taxon
- PeachPrunus persicat0
- Organ / stage
- shootse0
- Outcome
- seedling survivale0
- Direction
- No correlatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No correlation existed between seedling survival and the initial responses of shoots”
t0“Peach”
Claim · model-written summary
Root growth of 83-day embryos exceeded all other maturity stages.
- Taxon
- PeachPrunus persicat0
- Organ / stage
- 83‐day embryose0
- Outcome
- Root growthe0
- Direction
- exceedede0
- Comparator
- all other stages of maturitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root growth of 83‐day embryos exceeded that of all other stages of maturity”
t0“Peach”
Claim · model-written summary
The 83-day stage had maximum seedling survival and vigor.
- Taxon
- PeachPrunus persicat0
- Organ / stage
- 83‐day embryost1
- Outcome
- maximum seedling survival and vigore0
- Direction
- maximume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This was reflected in maximum seedling survival and vigor”
t0“Peach”
t1“83‐day embryos”
Claim · model-written summary
Initial shoot growth was greatest at 91 and 107 days.
- Taxon
- PeachPrunus persicat0
- Organ / stage
- embryose0
- Outcome
- Initial shoot growthe0
- Direction
- greateste0
- Value
- 91 days and at maturity (107 days)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Initial shoot growth was greatest from embryos harvested at 91 days and at maturity (107 days)”
t0“Peach”
Claim · model-written summary
All shoots formed rosettes, with some later expansion or axillary development.
- Taxon
- PeachPrunus persicat0
- Organ / stage
- shootse0
- Outcome
- developed into rosettese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all shoots developed into rosettes which may expand slightly or develop normally from axillary buds”
t0“Peach”
Claim · model-written summary
Early shoot development correlated strongly with auxin concentration.
- Taxon
- PeachPrunus persicat0
- Compound
- auxine0
- Outcome
- early shoot developmente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a strong correlation between early shoot development and auxin concentration”
t0“Peach”
Claim · model-written summary
Root growth responses appeared correlated with a promoter-inhibitor balance.
- Taxon
- PeachPrunus persicat0
- Compound
- promotor‐inhibitore0
- Outcome
- Root growth‐responsese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root growth‐responses appeared to be correlated with a promotor‐inhibitor balance”
t0“Peach”
Claim · model-written summary
Embryo extracts suggested three growth promoters, strongest at Rf 0.70.
- Taxon
- PeachPrunus persicat0
- Organ / stage
- embryot1
- Outcome
- presence of three growth promotorse0
- Value
- Rf 0.70e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“suggest the presence of three growth promotors, in greatest concentration at Rf 0.70, but also at Rf values 0.10 and 0.30”
t0“Peach”
t1“embryo extracts”
Claim · model-written summary
Two growth inhibitors were present in embryo tissue at Rf 0.27 and 0.96.
- Taxon
- PeachPrunus persicat0
- Organ / stage
- embryo tissuee0
- Outcome
- Two growth inhibitors were presente0
- Value
- Rf values 0.27 and 0.96e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two growth inhibitors were present in embryo tissue at Rf values 0.27 and 0.96”
t0“Peach”
Claim · model-written summary
The inhibitor at Rf 0.27 declined as embryo maturity increased.
- Taxon
- PeachPrunus persicat0
- Organ / stage
- embryoe0
- Outcome
- decreasing in concentratione0
- Direction
- decreasinge0
- Qualifier
- formere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the former decreasing in concentration with increasing embryo maturity”
t0“Peach”