Abstract
Pith callus tissues were grown under continuous blue (450 mμ), green (545 mμ), red (650 mμ), and ‘white’ (full-spectrum) light, and in the dark for 22 days at 27±2° C at energy levels of 15,000 ergs cm−2 sec−1. Mean increases in fresh weight of tissues grown under ‘white’ and blue light were significantly greater than those of tissues grown in green and red light and in the dark. Tissues grown in the dark yielded mean fresh weight increases significantly lower than tissues grown under blue, red, and ‘white’ light. No significant differences were shown between blue and ‘white’, red and green, and green and dark treatments respectively. Cell differentiation occurred in all treatments only to the extent of vessel element formation. There were no differences in degree of differentiation between treatments. It was proposed that the high-energy reaction of photomorphogenesis was in operation in the Pelargonium callus tissue. The results indicated the presence in the tissue of high-energy photoreceptor(s). The use of high-intensity, incandescent illumination for experimental procedures approximating natural conditions of irradiation was indicated as desirable for pith callus tissues of Pelargonium zonale var. Enchantress Fiat.
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Claims 9
Claim · model-written summary
White and blue light produced greater callus fresh-weight gains than green, red or dark treatments.
- Taxon
- Pelargonium
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Pelargoniumt0 - Treatment
- ‘white’ and blue lighte0
- Outcome
- increases in fresh weighte0
- Direction
- greatere0
- Comparator
- green and red light and in the darke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Mean increases in fresh weight of tissues grown under ‘white’ and blue light were significantly greater than those of tissues grown in green and red light and in the dark”
t0“Pelargonium Callus Tissue”
Claim · model-written summary
Dark-grown callus had lower fresh-weight gains than blue, red and white light treatments.
- Taxon
- PelargoniumPelargoniumt0
- Treatment
- in the darke0
- Outcome
- fresh weight increasese0
- Direction
- lowere0
- Comparator
- blue, red, and ‘white’ lighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tissues grown in the dark yielded mean fresh weight increases significantly lower than tissues grown under blue, red, and ‘white’ light”
t0“Pelargonium Callus Tissue”
Claim · model-written summary
Fresh-weight gain did not differ significantly between blue and white light.
- Taxon
- PelargoniumPelargoniumt0
- Treatment
- bluee0
- Outcome
- significant differencese0
- Direction
- No significant differencese0
- Comparator
- ‘white’e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No significant differences were shown between blue and ‘white’, red and green, and green and dark treatments respectively”
t0“Pelargonium Callus Tissue”
Claim · model-written summary
Fresh-weight gain did not differ significantly between red and green light.
- Taxon
- PelargoniumPelargoniumt0
- Treatment
- rede0
- Outcome
- significant differencese0
- Direction
- No significant differencese0
- Comparator
- greene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No significant differences were shown between blue and ‘white’, red and green, and green and dark treatments respectively”
t0“Pelargonium Callus Tissue”
Claim · model-written summary
Fresh-weight gain did not differ significantly between green light and darkness.
- Taxon
- PelargoniumPelargoniumt0
- Treatment
- greene0
- Outcome
- significant differencese0
- Direction
- No significant differencese0
- Comparator
- darke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No significant differences were shown between blue and ‘white’, red and green, and green and dark treatments respectively”
t0“Pelargonium Callus Tissue”
Claim · model-written summary
All light treatments produced vessel elements as the only observed differentiation.
- Taxon
- PelargoniumPelargoniumt0
- Organ / stage
- Celle0
- Outcome
- vessel element formatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cell differentiation occurred in all treatments only to the extent of vessel element formation”
t0“Pelargonium Callus Tissue”
Claim · model-written summary
Degree of callus differentiation did not differ among treatments.
- Taxon
- PelargoniumPelargoniumt0
- Treatment
- treatmentse0
- Outcome
- degree of differentiatione0
- Direction
- no differencese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were no differences in degree of differentiation between treatments”
t0“Pelargonium Callus Tissue”
Claim · model-written summary
The authors inferred high-energy photoreceptors in Pelargonium callus.
- Taxon
- PelargoniumPelargoniumt0
- Outcome
- presence in the tissue of high-energy photoreceptor(s)e0
- Qualifier
- high-energy photoreceptor(s)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results indicated the presence in the tissue of high-energy photoreceptor(s)”
t0“Pelargonium Callus Tissue”
Claim · model-written summary
The authors recommend high-intensity incandescent illumination for experiments approximating natural irradiation conditions in Pelargonium pith callus.
- Taxon
- Pelargonium zonale var. Enchantress Fiat
Pelargonium zonalee0
- Outcome
- use of high-intensity, incandescent illumination for experimental procedures approximating natural conditions of irradiatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of high-intensity, incandescent illumination for experimental procedures approximating natural conditions of irradiation was indicated as desirable for pith callus tissues of Pelargonium zonale var. Enchantress Fiat”
The same questions in other papers
light · growth · PelargoniumPositive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
1 paper more in this group
See all 5 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.