Abstract
Two varieties of rice sensitive to the length of photoperiod, Nero di Vialone and Kameji, and 2 insensitive varieties, Fortuna and Karang Serang, were subjected to daily photoperiods of 12 and 18 hr. applied either throughout the growing period or at various stages of the growing period. Earlier formation of panicles was induced by 12 hr. than by 18 hr. photoperiods in the case of Nero di Vialone and Kameji, but not in the case of Fortuna and Karang Serang. Where early flowering was induced by the use of 12 hr. photoperiods the panicles on the main stem were smaller than corresponding panicles on plants grown with 18 hr. photoperiods. The length of photoperiod had no direct influence on the growth of leaves. In the case of the sensitive variety Nero di Vialone, all tillers subjected to 12 hr. photoperiods from the beginning of growth entered the reproductive stage, after which a proportion of them ceased development, whereas a proportion of the tillers subjected to 18 hr. photoperiods from the beginning of growth ceased development before they had formed an inflorescence. A change from 12 hr. to 18 hr. photoperiods in sensitive varieties at the time of initiation of inflorescences caused a delay, and a change from 18 hr. to 12 hr. photoperiods, a hastening, of the subsequent development of flowers. The morphological characters of the axillary buds of rice plants at various stages of growth are described.-W.J.B. (Abstract retrieved from CAB Abstracts by CABI’s permission)
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Claims 11
Claim · model-written summary
A 12 hr photoperiod induced earlier panicle formation than 18 hr in Nero di Vialone.
Verbatim
e0“Earlier formation of panicles was induced by 12 hr. than by 18 hr. photoperiods in the case of Nero di Vialone and Kameji”
e1“in the case of Nero di Vialone and Kameji”
Claim · model-written summary
A 12 hr photoperiod induced earlier panicle formation than 18 hr in Kameji.
Verbatim
e0“Earlier formation of panicles was induced by 12 hr. than by 18 hr. photoperiods in the case of Nero di Vialone and Kameji”
e1“in the case of Nero di Vialone and Kameji”
Claim · model-written summary
Panicle formation did not differ between photoperiods in Fortuna.
Verbatim
e0“Earlier formation of panicles was induced by 12 hr. than by 18 hr. photoperiods in the case of Nero di Vialone and Kameji, but not in the case of Fortuna and Karang Serang”
e1“but not in the case of Fortuna and Karang Serang”
Claim · model-written summary
Panicle formation did not differ between photoperiods in Karang Serang.
Verbatim
e0“Earlier formation of panicles was induced by 12 hr. than by 18 hr. photoperiods in the case of Nero di Vialone and Kameji, but not in the case of Fortuna and Karang Serang”
e1“but not in the case of Fortuna and Karang Serang”
Claim · model-written summary
Early flowering induced by 12 hr photoperiods produced smaller main-stem panicles than 18 hr photoperiods.
- Taxon
- rice
Oryza sativae1 - Treatment
- 12 hr. photoperiodse0
- Outcome
- panicles on the main steme0
- Direction
- smallere0
- Comparator
- 18 hr. photoperiodse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Where early flowering was induced by the use of 12 hr. photoperiods the panicles on the main stem were smaller than corresponding panicles on plants grown with 18 hr. photoperiods”
e1“rice plants”
Claim · model-written summary
Photoperiod length had no direct influence on leaf growth.
- Taxon
- riceOryza sativae1
- Treatment
- length of photoperiode0
- Outcome
- growth of leavese0
- Direction
- no direct influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The length of photoperiod had no direct influence on the growth of leaves”
e1“rice plants”
Claim · model-written summary
All tillers of Nero di Vialone subjected to 12 hr photoperiods from the start entered the reproductive stage.
Verbatim
e0“all tillers subjected to 12 hr. photoperiods from the beginning of growth entered the reproductive stage”
e1“In the case of the sensitive variety Nero di Vialone”
Claim · model-written summary
Some tillers of Nero di Vialone under 12 hr photoperiods ceased development after entering reproduction.
Verbatim
e0“after which a proportion of them ceased development”
e1“In the case of the sensitive variety Nero di Vialone”
Claim · model-written summary
Some tillers of Nero di Vialone under 18 hr photoperiods ceased development before inflorescence formation.
Verbatim
e0“a proportion of the tillers subjected to 18 hr. photoperiods from the beginning of growth ceased development before they had formed an inflorescence”
e1“In the case of the sensitive variety Nero di Vialone”
Claim · model-written summary
Switching sensitive varieties from 12 to 18 hr at inflorescence initiation delayed subsequent flower development.
- Taxon
- sensitive varietiese1
- Treatment
- 12 hr. to 18 hr. photoperiodse0
- Outcome
- development of flowerse0
- Direction
- delaye0
Not reportedComparator
Verbatim
e0“A change from 12 hr. to 18 hr. photoperiods in sensitive varieties at the time of initiation of inflorescences caused a delay, and a change from 18 hr. to 12 hr. photoperiods, a hastening, of the subsequent development of flowers”
e1“photoperiods in sensitive varieties at the time of initiation of inflorescences”
Claim · model-written summary
Switching sensitive varieties from 18 to 12 hr at inflorescence initiation hastened subsequent flower development.
- Taxon
- sensitive varietiese1
- Treatment
- 18 hr. to 12 hr. photoperiodse0
- Outcome
- development of flowerse0
- Direction
- hasteninge0
Not reportedComparator
Verbatim
e0“a change from 18 hr. to 12 hr. photoperiods, a hastening, of the subsequent development of flowers”
e1“photoperiods in sensitive varieties at the time of initiation of inflorescences”
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See all 95 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.