Abstract
A morphactin, the chlorflurenol IT-3456 (CFL), was applied to sunflower in order to evaluate its effects on growth, chlorophyll content and rates of photosynthesis, respiration and transpiration. At the concentrations used in the experiments (50, 100, 200, 300 ppm) growth inhibition and morphogenic effects of CFL were evident. However, this morphactin did not significantly decrease the fresh and dry weights of plants. The treatment at the lowest concentration of CFL (50 ppm) stimulated chlorophyll a and b synthesis while the other treatments had no effect. An open system to measure the gas exchanges of sunflower leaves was used to calculate the rates of photosynthesis, respiration and transpiration. Rates of these processes were not significantly affected by the application of different concentrations of CFL. It is suggested that the growth inhibition of plants treated with CFL owes more to an effect at the partition level of the new photosynthates rather than by an alteration of the photosynthesis mechanisms.Key words: Morphactin, chlorflurenol, photosynthesis, respiration, transpiration, sunflower
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Claims 7
Claim · model-written summary
Chlorflurenol caused growth inhibition in sunflower.
- Taxon
- sunflower
Helianthus annuuse1 - Treatment
- CFLe1
- Outcome
- growth inhibitione0
- Direction
- inhibitione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At the concentrations used in the experiments (50, 100, 200, 300 ppm) growth inhibition and morphogenic effects of CFL were evident.”
e1“A morphactin, the chlorflurenol IT-3456 (CFL), was applied to sunflower in order to evaluate its effects on growth, chlorophyll content and rates of photosynthesis, respiration and transpiration.”
Claim · model-written summary
Chlorflurenol caused morphogenic effects in sunflower.
- Taxon
- sunflowerHelianthus annuuse1
- Treatment
- CFLe1
- Outcome
- morphogenic effectse0
- Direction
- morphogenic effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At the concentrations used in the experiments (50, 100, 200, 300 ppm) growth inhibition and morphogenic effects of CFL were evident.”
e1“A morphactin, the chlorflurenol IT-3456 (CFL), was applied to sunflower in order to evaluate its effects on growth, chlorophyll content and rates of photosynthesis, respiration and transpiration.”
Claim · model-written summary
Chlorflurenol did not significantly decrease plant fresh and dry weight.
- Taxon
- TOURNESOLt0
- Treatment
- this morphactine0
- Outcome
- fresh and dry weightse0
- Direction
- did not significantly decreasee0
Not reportedComparator
Verbatim
e0“However, this morphactin did not significantly decrease the fresh and dry weights of plants.”
t0“TOURNESOL”
Claim · model-written summary
CFL at 50 ppm stimulated chlorophyll a and b synthesis.
Not reportedComparator
Verbatim
e0“The treatment at the lowest concentration of CFL (50 ppm) stimulated chlorophyll a and b synthesis while the other treatments had no effect.”
t0“TOURNESOL”
Claim · model-written summary
Other CFL concentrations had no effect on chlorophyll synthesis.
- Taxon
- TOURNESOLt0
- Treatment
- other treatmentse0
- Outcome
- chlorophyll a and b synthesise0
- Direction
- no effecte0
Not reportedComparator
Verbatim
e0“The treatment at the lowest concentration of CFL (50 ppm) stimulated chlorophyll a and b synthesis while the other treatments had no effect.”
t0“TOURNESOL”
Claim · model-written summary
Photosynthesis, respiration and transpiration rates were not significantly affected by CFL.
- Taxon
- sunflowerHelianthus annuuse1
- Treatment
- different concentrations of CFLe0
- Outcome
- rates of photosynthesis, respiration and transpiratione1
- Direction
- not significantly affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rates of these processes were not significantly affected by the application of different concentrations of CFL.”
e1“An open system to measure the gas exchanges of sunflower leaves was used to calculate the rates of photosynthesis, respiration and transpiration.”
Claim · model-written summary
The authors suggest that altered partitioning of new photosynthates explains CFL-related growth inhibition.
Verbatim
e0“It is suggested that the growth inhibition of plants treated with CFL owes more to an effect at the partition level of the new photosynthates rather than by an alteration of the photosynthesis mechanisms.”
t0“TOURNESOL”