Abstract
Bud burst in certain species is conditioned by the luminous environment. With roses, the requirement for light is absolute, and darkness totally inhibits bud burst. Few studies have looked into understanding the action of light on the physiological bud burst processes. Here, we show the impact of light on certain components of glucidic metabolism during bud burst. Measurements were taken on decapitated plants of Rosa hybrida L. 'Radrazz' exposed either to darkness, white, blue or R light. Results show that a mobilization of bud and the carrying stem sucrose reserves only takes place in light and accompanies the bud burst. Furthermore, the activity of the RhVI vacuolar acid invertase which contributes to the breakdown of sucrose in the buds, as well as the transcription of the RhVI gene, is reduced in darkness, although it is strongly stimulated by light. The same analysis concerning the RhNAD-SDH gene, coding an NAD-dependent sorbitol dehydrogenase, shows, on the contrary, a strong induction of its transcription in darkness that could reflect the use of survival mechanisms in this condition.
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Claims 5
Claim · model-written summary
Darkness totally inhibited rose bud burst.
Verbatim
e0“With roses, the requirement for light is absolute, and darkness totally inhibits bud burst”
Claim · model-written summary
Bud and carrying-stem sucrose reserves were mobilized only in light during rose bud burst.
- Taxon
- Rosa hybrida L.
Rosa hybrid cultivare1 - Material
- 'Radrazz'e1
- Treatment
- lighte0
- Outcome
- mobilization of bud and the carrying stem sucrose reservese0
- Direction
- only takes placee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a mobilization of bud and the carrying stem sucrose reserves only takes place in light and accompanies the bud burst”
e1“Rosa hybrida L. 'Radrazz'”
Claim · model-written summary
RhVI vacuolar acid invertase activity was reduced in darkness and stimulated by light.
- Taxon
- Rosa hybrida L.Rosa hybrid cultivare1
- Treatment
- darknesse0
- Gene
- RhVI vacuolar acid invertasee0
- Outcome
- activity of the RhVI vacuolar acid invertasee0
- Direction
- reducede0
- Comparator
- lighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“activity of the RhVI vacuolar acid invertase which contributes to the breakdown of sucrose in the buds, as well as the transcription of the RhVI gene, is reduced in darkness, although it is strongly stimulated by light”
e1“Rosa hybrida L. 'Radrazz'”
Claim · model-written summary
RhVI gene transcription was reduced in darkness and stimulated by light.
- Taxon
- Rosa hybrida L.Rosa hybrid cultivare1
- Treatment
- darknesse0
- Gene
- RhVIe0
- Outcome
- transcription of the RhVI genee0
- Direction
- reducede0
- Comparator
- lighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the transcription of the RhVI gene, is reduced in darkness, although it is strongly stimulated by light”
e1“Rosa hybrida L. 'Radrazz'”
Claim · model-written summary
RhNAD-SDH transcription was strongly induced in darkness.
- Taxon
- Rosa hybrida L.Rosa hybrid cultivare1
- Treatment
- darknesse0
- Gene
- RhNAD-SDHe0
- Outcome
- transcriptione0
- Direction
- strong inductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“RhNAD-SDH gene, coding an NAD-dependent sorbitol dehydrogenase, shows, on the contrary, a strong induction of its transcription in darkness”
e1“Rosa hybrida L. 'Radrazz'”
The same questions in other papers
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See all 15 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.