Abstract
Rooting ability was studied for cuttings derived from pea plants ( Pisum sativum , L. cv. Alaska) grown in controlled environment rooms. When the cuttings were rooted at 70 μmol m −2 s − , 1 (photosynthetic photon flux density) or more, a stock plant irradiance at 100 μmol m −2 s −1 decreased rooting ability in cuttings compared to 5 μmol m −2 , s −1 , However, cuttings rooted at 160 μmol m −2 s −1 formed more roots compared to 5 (μmol m −2 s −1 . Although a high irradiance increased the number of roots formed, it could not overcome a decreased potential for root formation in stock plants grown at high irradiance. Light compensation point and dark respiration of cuttings decreased by 70% during the rooting period, and the final levels were strongly influenced by the irradiance to the cuttings. Respiratory O 2 uptake decreased in the apex and the base of the cutting from day 2 onwards, whereas a constant level was found in the leaves. Only the content of extractable fructose, glucose, sucrose and starch varied during the early part of the rooting period. We conclude that the observed changes in the cuttings are initiated by excision of the root system, and are not involved in the initiation of adventitious roots.
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Claims 9
Claim · model-written summary
High stock plant irradiance reduced cutting rooting ability versus low irradiance when rooted at at least 70 μmol m −2 s −1.
- Taxon
- Pisum sativum
Lathyrus oleraceust0 - Organ / stage
- cuttingse0
- Treatment
- stock plant irradiance at 100 μmol m −2 s −1e0
- Outcome
- rooting abilitye0
- Direction
- decreasede0
- Comparator
- 5 μmol m −2 , s −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a stock plant irradiance at 100 μmol m −2 s −1 decreased rooting ability in cuttings compared to 5 μmol m −2 , s −1”
t0“Pisum sativum”
Claim · model-written summary
Cuttings rooted at 160 μmol m −2 s −1 formed more roots than those at 5 μmol m −2 s −1.
- Taxon
- Pisum sativumLathyrus oleraceust0
- Treatment
- 160 μmol m −2 s −1e0
- Outcome
- rootse0
- Direction
- moree0
- Comparator
- 5 (μmol m −2 s −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cuttings rooted at 160 μmol m −2 s −1 formed more roots compared to 5 (μmol m −2 s −1”
t0“Pisum sativum”
Claim · model-written summary
High cutting irradiance did not overcome reduced root formation potential from high stock irradiance.
- Taxon
- Pisum sativumLathyrus oleraceust0
- Treatment
- high irradiancee0
- Outcome
- potential for root formatione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a high irradiance increased the number of roots formed, it could not overcome a decreased potential for root formation in stock plants grown at high irradiance”
t0“Pisum sativum”
Claim · model-written summary
Light compensation point and dark respiration decreased by 70% over rooting.
- Taxon
- Pisum sativumLathyrus oleraceust0
- Outcome
- Light compensation point and dark respiratione0
- Direction
- decreasede0
- Value
- 70%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Light compensation point and dark respiration of cuttings decreased by 70% during the rooting period”
t0“Pisum sativum”
Claim · model-written summary
Final light compensation and respiration levels were strongly influenced by cutting irradiance.
- Taxon
- Pisum sativumLathyrus oleraceust0
- Treatment
- irradiance to the cuttingse0
- Outcome
- final levelse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the final levels were strongly influenced by the irradiance to the cuttings”
t0“Pisum sativum”
Claim · model-written summary
Respiratory oxygen uptake declined in cutting apex and base from day 2.
- Taxon
- Pisum sativumLathyrus oleraceust0
- Organ / stage
- apex and the base of the cuttinge0
- Outcome
- Respiratory O 2 uptakee0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Respiratory O 2 uptake decreased in the apex and the base of the cutting from day 2 onwards”
t0“Pisum sativum”
Claim · model-written summary
Respiratory oxygen uptake remained constant in leaves.
- Taxon
- Pisum sativumLathyrus oleraceust0
- Organ / stage
- leavese0
- Outcome
- constant levele0
- Direction
- constante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a constant level was found in the leaves”
t0“Pisum sativum”
Claim · model-written summary
Extractable fructose, glucose, sucrose and starch varied early in rooting.
- Taxon
- Pisum sativumLathyrus oleraceust0
- Outcome
- content of extractable fructose, glucose, sucrose and starche0
- Direction
- variede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only the content of extractable fructose, glucose, sucrose and starch varied during the early part of the rooting period”
t0“Pisum sativum”
Claim · model-written summary
The authors attribute observed cutting changes to root-system excision rather than adventitious root initiation.
- Taxon
- Pisum sativumLathyrus oleraceust0
- Outcome
- observed changes in the cuttingse0
- Qualifier
- excision of the root systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the observed changes in the cuttings are initiated by excision of the root system, and are not involved in the initiation of adventitious roots”
t0“Pisum sativum”
The same questions in other papers
light · growth · Lathyrus oleraceus (pea)Positive and negative results
25 papers in the same direction as this paper · 33 in the opposite direction
- positive
- negative
- positive
55 papers more in this group
See all 59 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.