Abstract
Abstract Studies to determine influences of temperature, osmotic potential, and Ca on root growth were conducted. Hourly elongation of pea roots at 27C was a maximum of about 1.0 mm/hr after 64 to 72 hours. Osmotic potentials of −7.8 and −13.1 bars reduced root growth of peas by about 50 and 85%, respectively. Maximum hourly elongation of cotton was about 3.3 mm/hr at 32 to 38 C after 24 to 48 hours. At optimum temperature conditions and salinity levels of −0.8, −6.6, and −12.9 bars, maximum root elongation of cotton averaged 3.3, 1.8, and 0.8 mm/ hr, respectively. Optimum temperature for root elongation of cotton varied from 27 to 38 C depending upon the salinity and Ca levels. At low salinity levels Ca requirement for maximum elongation was low, but at moderate and high salinity levels Ca requirement for maximum elongation was 15 to 20 meq/liter. The stimulatory effect of Ca on root growth of cotton under salinity conditions was greatest at high temperatures (32 to 38 C). However, root growth and vigor was significantly improved by Ca at low temperatures (21 C). Calcium seems to induce root vigor and growth at adverse soil temperatures and salinity conditions. Additions of Ca may promote better stands and higher yields on certain soils.
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Claims 12
Claim · model-written summary
Pea roots reached maximum elongation of about 1.0 mm/hr after 64 to 72 hours at 27C.
- Taxon
- pea
Lathyrus oleraceuse0 - Organ / stage
- rootse0
- Outcome
- Hourly elongatione0
- Value
- about 1.0 mm/hre0
- Qualifier
- at 27Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hourly elongation of pea roots at 27C was a maximum of about 1.0 mm/hr after 64 to 72 hours.”
Claim · model-written summary
Osmotic potential of −7.8 bars reduced pea root growth by about 50%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Osmotic potentials of −7.8 and −13.1 bars reduced root growth of peas by about 50 and 85%, respectively.”
Claim · model-written summary
Osmotic potential of −13.1 bars reduced pea root growth by about 85%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Osmotic potentials of −7.8 and −13.1 bars reduced root growth of peas by about 50 and 85%, respectively.”
Claim · model-written summary
Cotton root elongation reached about 3.3 mm/hr at 32 to 38 C after 24 to 48 hours.
- Taxon
- cotton
Gossypium hirsutume0 - Outcome
- Maximum hourly elongatione0
- Value
- about 3.3 mm/hre0
- Qualifier
- at 32 to 38 C after 24 to 48 hourse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum hourly elongation of cotton was about 3.3 mm/hr at 32 to 38 C after 24 to 48 hours.”
Claim · model-written summary
Cotton maximum root elongation averaged 3.3 mm/ hr at −0.8 bars.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- maximum root elongatione0
- Value
- 3.3e0
- Qualifier
- −0.8e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At optimum temperature conditions and salinity levels of −0.8, −6.6, and −12.9 bars, maximum root elongation of cotton averaged 3.3, 1.8, and 0.8 mm/ hr, respectively.”
Claim · model-written summary
Cotton maximum root elongation averaged 1.8 mm/ hr at −6.6 bars.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- maximum root elongatione0
- Value
- 1.8e0
- Qualifier
- −6.6e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At optimum temperature conditions and salinity levels of −0.8, −6.6, and −12.9 bars, maximum root elongation of cotton averaged 3.3, 1.8, and 0.8 mm/ hr, respectively.”
Claim · model-written summary
Cotton maximum root elongation averaged 0.8 mm/ hr at −12.9 bars.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- maximum root elongatione0
- Value
- 0.8 mm/ hre0
- Qualifier
- −12.9 barse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At optimum temperature conditions and salinity levels of −0.8, −6.6, and −12.9 bars, maximum root elongation of cotton averaged 3.3, 1.8, and 0.8 mm/ hr, respectively.”
Claim · model-written summary
Cotton optimum root elongation temperature varied from 27 to 38 C with salinity and calcium levels.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- salinity and Ca levelse0
- Outcome
- Optimum temperature for root elongatione0
- Value
- 27 to 38 Ce0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Optimum temperature for root elongation of cotton varied from 27 to 38 C depending upon the salinity and Ca levels.”
Claim · model-written summary
At moderate and high salinity, cotton needed 15 to 20 meq/liter calcium for maximum elongation.
- Taxon
- cottonGossypium hirsutume1
- Outcome
- Ca requirement for maximum elongatione0
- Value
- 15 to 20 meq/litere0
- Qualifier
- moderate and high salinity levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At low salinity levels Ca requirement for maximum elongation was low, but at moderate and high salinity levels Ca requirement for maximum elongation was 15 to 20 meq/liter.”
e1“root elongation of cotton varied”
Claim · model-written summary
Calcium stimulation of cotton root growth under salinity was greatest at 32 to 38 C.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- Cae0
- Outcome
- root growthe0
- Direction
- greateste0
- Qualifier
- high temperatures (32 to 38 C)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The stimulatory effect of Ca on root growth of cotton under salinity conditions was greatest at high temperatures (32 to 38 C).”
Claim · model-written summary
Calcium significantly improved cotton root growth and vigor at 21 C.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- Cae0
- Outcome
- root growth and vigore0
- Direction
- improvede0
- Qualifier
- low temperatures (21 C)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, root growth and vigor was significantly improved by Ca at low temperatures (21 C).”
e1“root growth of cotton under salinity conditions”
Claim · model-written summary
Calcium additions may promote stands and yields on certain soils.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- Additions of Cae0
- Outcome
- better stands and higher yieldse0
- Qualifier
- certain soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Additions of Ca may promote better stands and higher yields on certain soils.”
e1“root growth of cotton under salinity conditions”
The same questions in other papers
calcium atom · growth · Gossypium hirsutum (cotton)Results agree
6 papers in the same direction as this paper
- positive
- positive
- positive
3 papers more in this group
See all 7 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.