Abstract
A CO2 laser-based photoacoustic method was used to determine the initial changes in ethylene production following emasculation of selected orchid species. The laser photoacoustic equipment consisted of a line tunable CO2 laser in conjunction with a single pass resonant acoustic cell. The minimum detection limit of the system for ethylene was 0.03 nl/1. In all tested orchid species an increase in ethylene production was measured within a few hours after emasculation. The time dependent pattern of ethylene production in Cymbidium and Oncidium showed an optimum. In Phalaenopsis and Epidendrum it was characterized by a gradual increase. The principle of photoacoustics and its application in plant physiological studies is discussed.
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Claims 6
Claim · model-written summary
The laser photoacoustic system had an ethylene detection limit of 0.03 nl/1.
Verbatim
e0“The minimum detection limit of the system for ethylene was 0.03 nl/1”
e1“selected orchid species”
Claim · model-written summary
Ethylene production increased within hours of emasculation in every tested orchid species.
- Taxon
- orchid speciese0
- Treatment
- emasculatione0
- Outcome
- ethylene productione0
- Direction
- increasee0
- Qualifier
- within a few hourse0
Not reportedComparator
Verbatim
e0“In all tested orchid species an increase in ethylene production was measured within a few hours after emasculation”
Claim · model-written summary
Ethylene production over time showed an optimum in Cymbidium.
CymbidiumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The time dependent pattern of ethylene production in Cymbidium and Oncidium showed an optimum”
Claim · model-written summary
Ethylene production over time showed an optimum in Oncidium.
OncidiumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The time dependent pattern of ethylene production in Cymbidium and Oncidium showed an optimum”
Claim · model-written summary
Ethylene production gradually increased in Phalaenopsis.
- Taxon
- Phalaenopsis
_(47706143821).jpg?width=60)
Phalaenopsise0 - Outcome
- ethylene productione1
- Direction
- gradual increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_(47706143821).jpg?width=500)
Verbatim
e0“In Phalaenopsis and Epidendrum it was characterized by a gradual increase”
e1“The time dependent pattern of ethylene production in Cymbidium and Oncidium showed an optimum”
Claim · model-written summary
Ethylene production gradually increased in Epidendrum.
- Taxon
- Epidendrum
.jpg?width=60)
Epidendrume0 - Outcome
- ethylene productione1
- Direction
- gradual increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“In Phalaenopsis and Epidendrum it was characterized by a gradual increase”
e1“The time dependent pattern of ethylene production in Cymbidium and Oncidium showed an optimum”