Abstract
The use of LED supplementary lighting for adaptation of cassette plants of heuchera and weigela after their clonal micropropagation compensates for insignificant natural illumination and low duration of photoperiod at the autumn-winter time. Supplementary lighting largely accelerates growth and accumulation of leaf biomass (leaf blade area, total area of plant leaves) as leaves are the primary photosynthetic organs. The formed leaf apparatus is the action place of assimilation processes, which determine the growth and development of other plant organs and affect the total plant mass. In the studied ornamental crops, the energy indicators of light sources (PAR, PPFD, illuminance level) directly affect the leaf blade area and the total leaf area indices (R=0.73...0.92). We have found positive correlations between the proportion of red range phytolamps in total spectrum with leaf mass (R=0.42…0.44) and total plant mass (R=0.42…0.56). Moreover, an increase in the proportion of blue spectral range is accompanied by a decrease in dry mass of the main plant organs and its total weight (R=–0.50…–0.78). The highest growth and development rates of heuchera and weigela plants are observed in Variants 4, 5 (full-spectrum LED phytolamps with high illuminance intensity) and 7 (a phytolamp with a red-blue spectrum and a violet tint of glow). Therefore, it is advisable to reduce the duration of their adaptation period by an average of 1.5 time. This, in turn, will allow for an increase in number of production cycles of horticultural seedlings per year using accelerated biotechnological methods – with a consistent combination of clonal micropropagation and plant adaptation in protected conditions (under glass) – to obtain plant material that meets high nursery standards.
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Claims 8
Claim · model-written summary
Supplementary lighting accelerated leaf growth and leaf biomass accumulation.
- Treatment
- Supplementary lightinge0
- Outcome
- growth and accumulation of leaf biomasse0
- Direction
- acceleratese0
Heuchera
WeigelaNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Supplementary lighting largely accelerates growth and accumulation of leaf biomass (leaf blade area, total area of plant leaves)”
e1“cassette plants of heuchera and weigela”
Claim · model-written summary
Light-source energy indicators correlated with leaf blade and total leaf areas.
- Treatment
- energy indicators of light sourcese0
- Outcome
- leaf blade area and the total leaf area indicese0
- Value
- R=0.73...0.92e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the energy indicators of light sources (PAR, PPFD, illuminance level) directly affect the leaf blade area and the total leaf area indices (R=0.73...0.92)”
e1“cassette plants of heuchera and weigela”
Claim · model-written summary
Red-spectrum proportion positively correlated with leaf mass.
- Treatment
- proportion of red range phytolampse0
- Outcome
- leaf masse0
- Direction
- positive correlationse0
- Value
- R=0.42…0.44e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“positive correlations between the proportion of red range phytolamps in total spectrum with leaf mass (R=0.42…0.44)”
e1“cassette plants of heuchera and weigela”
Claim · model-written summary
Red-spectrum proportion positively correlated with total plant mass.
- Treatment
- proportion of red range phytolampse1
- Outcome
- total plant masse0
- Direction
- positive correlationse1
- Value
- R=0.42…0.56e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total plant mass (R=0.42…0.56)”
e1“positive correlations between the proportion of red range phytolamps in total spectrum with leaf mass (R=0.42…0.44) and total plant mass (R=0.42…0.56)”
e2“cassette plants of heuchera and weigela”
Claim · model-written summary
Higher blue-spectrum proportion accompanied lower dry mass of main plant organs and total weight.
- Treatment
- proportion of blue spectral rangee0
- Outcome
- dry mass of the main plant organs and its total weighte0
- Direction
- decreasee0
- Value
- R=–0.50…–0.78e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an increase in the proportion of blue spectral range is accompanied by a decrease in dry mass of the main plant organs and its total weight (R=–0.50…–0.78)”
e1“cassette plants of heuchera and weigela”
Claim · model-written summary
Full-spectrum LED variants 4 and 5 gave the highest plant growth and development rates.
- Treatment
- Variants 4, 5 (full-spectrum LED phytolamps with high illuminance intensity)e0
- Outcome
- growth and development ratese0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest growth and development rates of heuchera and weigela plants are observed in Variants 4, 5 (full-spectrum LED phytolamps with high illuminance intensity) and 7 (a phytolamp with a red-blue spectrum and a violet tint of glow)”
Claim · model-written summary
Red-blue spectrum variant 7 gave among the highest plant growth and development rates.
- Treatment
- 7 (a phytolamp with a red-blue spectrum and a violet tint of glow)e0
- Outcome
- growth and development ratese0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest growth and development rates of heuchera and weigela plants are observed in Variants 4, 5 (full-spectrum LED phytolamps with high illuminance intensity) and 7 (a phytolamp with a red-blue spectrum and a violet tint of glow)”
Claim · model-written summary
The authors advise shortening adaptation by an average of 1.5 time.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it is advisable to reduce the duration of their adaptation period by an average of 1.5 time”
e1“heuchera and weigela plants”
The same questions in other papers
light · growth · WeigelaResults agree
1 paper in the same direction as this paper
- positive
light · growth · HeucheraResults agree
3 papers in the same direction as this paper
- positive
- positive
- positive
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.