Abstract
The flowering of seven selections of Townsville lucerne (Stylosanthes humilis HBK) representing a range of maturity types has been studied in the Canberra phytotron. Daylength is the main factor controlling flowering in these selections, all of which showed a strong short day response. At normal temperatures the maximum daylengths at which all plants flowered (the critical daylengths) were 13 hours for the early, 12 hours for the midseason and late-midseason, and 11 1/2 hours for the late selections. However, the midseason selections did flower in a 12 1/2-hour daylength if the light intensity of the supplementary illumination was 20 or 5 ft.c. instead of the normal 50 ft.c. The response of the other selections was not altered at the lower light intensities. Both high night temperature and low day temperature delayed or inhibited flower initiation in the early and midseason selections and these effects were greater at a critical daylength.
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Claims 8
Claim · model-written summary
All selections showed a strong short-day flowering response.
Verbatim
e0“Daylength is the main factor controlling flowering in these selections, all of which showed a strong short day response”
t0“Townsville lucerne”
Claim · model-written summary
Early selections flowered at a maximum daylength of 13 hours.
Verbatim
e0“the critical daylengths) were 13 hours for the early”
t0“Townsville lucerne”
Claim · model-written summary
Midseason and late-midseason selections flowered at a maximum daylength of 12 hours.
Verbatim
e0“12 hours for the midseason and late-midseason”
e1“the critical daylengths”
t0“Townsville lucerne”
Claim · model-written summary
Late selections flowered at a maximum daylength of 11 1/2 hours.
Verbatim
e0“11 1/2 hours for the late selections”
e1“the critical daylengths”
t0“Townsville lucerne”
Claim · model-written summary
Midseason selections flowered at 12 1/2 hours when supplementary light was 20 or 5 ft.c.
- Taxon
- Townsville lucernet0
- Material
- midseason selectionse0
- Treatment
- 20 or 5 ft.c.e0
- Outcome
- did flowere0
- Comparator
- normal 50 ft.c.e0
Not reportedDirection
Verbatim
e0“the midseason selections did flower in a 12 1/2-hour daylength if the light intensity of the supplementary illumination was 20 or 5 ft.c. instead of the normal 50 ft.c.”
t0“Townsville lucerne”
Claim · model-written summary
Other selections had unchanged responses at lower light intensities.
- Taxon
- Townsville lucernet0
- Treatment
- lower light intensitiese0
- Outcome
- response of the other selectionse0
- Direction
- not alterede0
Not reportedComparator
Verbatim
e0“The response of the other selections was not altered at the lower light intensities”
t0“Townsville lucerne”
Claim · model-written summary
High night temperature delayed or inhibited flower initiation.
- Taxon
- Townsville lucernet0
- Treatment
- high night temperaturee0
- Outcome
- flower initiatione0
- Direction
- delayed or inhibitede0
Not reportedComparator
Verbatim
e0“Both high night temperature and low day temperature delayed or inhibited flower initiation in the early and midseason selections”
t0“Townsville lucerne”
Claim · model-written summary
Low day temperature delayed or inhibited flower initiation.
- Taxon
- Townsville lucernet0
- Treatment
- low day temperaturee0
- Outcome
- flower initiatione0
- Direction
- delayed or inhibitede0
Not reportedComparator
Verbatim
e0“Both high night temperature and low day temperature delayed or inhibited flower initiation in the early and midseason selections”
t0“Townsville lucerne”