Abstract
Two studies were conducted to determine the influence of pH on `Waimanalo' papaya seedling growth and morphology. The seedlings were grown in clear, plastic tubes with diameter of 7 cm and length of 21 cm, and substrate was silica sand. The substrate was drenched daily with complete nutrient solution. The solution was adjusted to pH of 3, 4, 5, 6, 7, 8, or 9. We used direct-seeded plants in the first study, and plants were harvested following 9.5 weeks of growth. We used transplants in the second study, and plants were harvested following 4 weeks of growth. Dry mass of plants was relatively unaffected by substrate pH within the range of 4 to 9. In both studies; however, dry mass of plants receiving solution with a pH of 3 was reduced. The response pattern was similar for canopy:root ratio, total root length, root growth rate, lateral root thickness, and root tip density. Unit leaf area per unit root length was greatly increased for plants receiving pH of 3, indicating increased susceptibility to drought conditions.
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Claims 6
Claim · model-written summary
Papaya dry mass was relatively unaffected at pH 4 through 9.
- Taxon
- Papaya
_-_DPLA_-_55200ec009622d7d42349f3583df310e.jpg?width=60)
Carica papayat0 - Treatment
- substrate pH within the range of 4 to 9e0
- Outcome
- Dry masse0
- Direction
- relatively unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_-_DPLA_-_55200ec009622d7d42349f3583df310e.jpg?width=500)
Verbatim
e0“Dry mass of plants was relatively unaffected by substrate pH within the range of 4 to 9.”
t0“Papaya Seedling Growth”
Claim · model-written summary
Papaya dry mass was reduced at pH 3 in both studies.
- Taxon
- PapayaCarica papayat0
- Treatment
- solution with a pH of 3e0
- Outcome
- dry masse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dry mass of plants receiving solution with a pH of 3 was reduced”
t0“Papaya Seedling Growth”
Claim · model-written summary
Canopy to root ratio, total root length and root growth rate followed the dry mass response pattern.
- Taxon
- PapayaCarica papayat0
- Treatment
- solution with a pH of 3e1
- Outcome
- canopy:root ratio, total root length, root growth ratee0
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The response pattern was similar for canopy:root ratio, total root length, root growth rate, lateral root thickness, and root tip density.”
e1“dry mass of plants receiving solution with a pH of 3 was reduced”
t0“Papaya Seedling Growth”
Claim · model-written summary
Lateral root thickness and root tip density followed the dry mass response pattern.
- Taxon
- PapayaCarica papayat0
- Treatment
- solution with a pH of 3e1
- Outcome
- lateral root thickness, and root tip densitye0
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The response pattern was similar for canopy:root ratio, total root length, root growth rate, lateral root thickness, and root tip density.”
e1“dry mass of plants receiving solution with a pH of 3 was reduced”
t0“Papaya Seedling Growth”
Claim · model-written summary
Unit leaf area per unit root length was greatly increased at pH 3.
- Taxon
- PapayaCarica papayat0
- Treatment
- pH of 3e0
- Outcome
- Unit leaf area per unit root lengthe0
- Direction
- greatly increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Unit leaf area per unit root length was greatly increased for plants receiving pH of 3”
t0“Papaya Seedling Growth”
Claim · model-written summary
The leaf area to root length pattern indicates greater drought susceptibility at pH 3.
- Taxon
- PapayaCarica papayat0
- Treatment
- pH of 3e1
- Outcome
- increased susceptibility to drought conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“indicating increased susceptibility to drought conditions”
e1“plants receiving pH of 3”
t0“Papaya Seedling Growth”
The same questions in other papers
growing medium · growth · Carica papaya (papaya)Positive and negative results
1 paper in the same direction as this paper · 25 in the opposite direction
- positive
- positive
- positive
23 papers more in this group
See all 27 papers →ph · growth · Carica papaya (papaya)Results agree
3 papers in the same direction as this paper
- negative
- negative
- no effect
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.