Abstract
Ornamental plant shape is one of the main criteria of plant sale value. Under horticultural practices, plant shape is classically modulated through the use of growth regulators that enhance plant capacity. Increasing concern about environmental preservation encourages for the search of new environmental-friendly practices. Light is known to be the environmental factor that most affects plant architecture and thus plant shape. Using specific light quality rather than chemicals could not only contribute to preserve the environment, but also cause new aesthetical effects on plant shape. With this objective, we studied the impact of blue light on three rose cultivars, Rosa hybrida 'Radrazz', Rosa hybrida 'Meiratcan' and Rosa chinensis 'Old Blush'. Plants were grown from single node cuttings under white (Mastec 36 Watt; white/33 cool neons), or blue light (Philips TL-D 36, Watt/18, blue neons) at an equal photosynthetic efficiency (110 mu mol.m(-2).s(-1)) until the end of flowering of second order axes. Surprisingly, plants grown under blue light had normal vegetative and floral developments: for the cultivars 'Radrazz' and 'Old Blush', morphological and architectural characteristics as length and diameter of first and second order axes, number and localisation of second order axes, number and length of metamers, were similar between the two light treatments. However, for Rosa hybrida 'Meiratcan', both organogenesis and growth were slightly affected by blue light with a decrease of metamer number, axis length and axis diameter for the order 1 axes and a decrease of the number of order 2 axes. These results thus reveal the strong adaptive properties of rose plants to their light environment, but the effects of blue light are cultivar dependent. As far as horticultural practices are concerned, testing the effect of blue light on a cultivar is necessary before deciding if blue light is an efficient treatment to modulate or change rose plant shape.
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Claims 5
Claim · model-written summary
Under blue versus white light, Radrazz morphological and architectural traits were similar.
- Taxon
- Rosa hybrida
Rosa hybrid cultivare1 - Material
- 'Radrazz'e1
- Treatment
- blue lighte2
- Outcome
- morphological and architectural characteristicse0
- Direction
- similare0
- Comparator
- the two light treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for the cultivars 'Radrazz' and 'Old Blush', morphological and architectural characteristics as length and diameter of first and second order axes, number and localisation of second order axes, number and length of metamers, were similar between the two light treatments”
e1“Rosa hybrida 'Radrazz'”
e2“plants grown under blue light”
Claim · model-written summary
Under blue versus white light, Old Blush morphological and architectural traits were similar.
- Taxon
- Rosa chinensis
Rosa chinensise1 - Material
- 'Old Blush'e1
- Treatment
- blue lighte2
- Outcome
- morphological and architectural characteristicse0
- Direction
- similare0
- Comparator
- the two light treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for the cultivars 'Radrazz' and 'Old Blush', morphological and architectural characteristics as length and diameter of first and second order axes, number and localisation of second order axes, number and length of metamers, were similar between the two light treatments”
e1“Rosa chinensis 'Old Blush'”
e2“plants grown under blue light”
Claim · model-written summary
Blue light reduced first order axis metamer number, length and diameter in Meiratcan.
- Taxon
- Rosa hybridaRosa hybrid cultivare0
- Material
- 'Meiratcan'e0
- Treatment
- blue lighte0
- Outcome
- metamer number, axis length and axis diameter for the order 1 axese0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for Rosa hybrida 'Meiratcan', both organogenesis and growth were slightly affected by blue light with a decrease of metamer number, axis length and axis diameter for the order 1 axes”
Claim · model-written summary
Blue light reduced the number of second order axes in Meiratcan.
- Taxon
- Rosa hybridaRosa hybrid cultivare0
- Material
- 'Meiratcan'e0
- Treatment
- blue lighte0
- Outcome
- number of order 2 axese0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for Rosa hybrida 'Meiratcan', both organogenesis and growth were slightly affected by blue light with a decrease of metamer number, axis length and axis diameter for the order 1 axes and a decrease of the number of order 2 axes”
Claim · model-written summary
The authors recommend testing blue light on a rose cultivar before using it to alter plant shape.
Verbatim
e0“testing the effect of blue light on a cultivar is necessary before deciding if blue light is an efficient treatment to modulate or change rose plant shape”
The same questions in other papers
light · growth · Rosa hybrid cultivarPositive and negative results
1 paper in the same direction as this paper · 11 in the opposite direction
- positive
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See all 13 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.