Abstract
Stevia is a perennial shrub commercially cultivated for the sweet-tasting compounds known as steviol glycosides (SVglys). SVglys are extracted from the green leaves, thus maintenance of vegetative growth is critical in stevia production. This study described the flowering habit and response of potted stevia plants to different photoperiods under Philippine conditions. Photoperiodic treatments (10, 11, 12, 13, and 14 h) were provided using light chambers. Stevia has both terminal and axillary flowering habits. It has five white florets enclosed in a capitulum and exhibits an opposite branching pattern. Results showed that stevia is a facultative short-day plant with a critical daylength of about 12 h. Earlier and more profuse flowering was observed in plants exposed to photoperiods less than 12 h. Earliest flowering response was in 10 h photoperiod which occurred 10 d after light treatment, while flowering time was extended to 23 d in the 14 h photoperiod. Plants subjected to the 10 h photoperiod had the largest number of flowers (34 flower clusters or capitula), while the most number of leaves (37 leaves) was recorded in the longest photoperiod treatment. The study also established that stevia under a 10 h photoperiod requires 10 inductive cycles to induce flowering. Photoperiod was found to have significant positive correlations with the number of nodes and flowering time.
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Claims 13
Claim · model-written summary
Stevia exhibited both terminal and axillary flowering.
- Outcome
- both terminal and axillary flowering habitse0
SteviaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stevia has both terminal and axillary flowering habits”
Claim · model-written summary
Stevia capitula contained five white florets.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It has five white florets enclosed in a capitulum”
t0“Stevia (Stevia rebaudiana Bertoni)”
Claim · model-written summary
Stevia exhibited an opposite branching pattern.
- Outcome
- opposite branching patterne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exhibits an opposite branching pattern”
t0“Stevia (Stevia rebaudiana Bertoni)”
Claim · model-written summary
Stevia was classified as a facultative short-day plant with a critical daylength near 12 hours.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“stevia is a facultative short-day plant with a critical daylength of about 12 h”
Claim · model-written summary
Photoperiods shorter than 12 hours produced earlier flowering.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Earlier and more profuse flowering was observed in plants exposed to photoperiods less than 12 h”
t0“Stevia (Stevia rebaudiana Bertoni)”
Claim · model-written summary
Photoperiods shorter than 12 hours produced more profuse flowering.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Earlier and more profuse flowering was observed in plants exposed to photoperiods less than 12 h”
t0“Stevia (Stevia rebaudiana Bertoni)”
Claim · model-written summary
At a 10-hour photoperiod, flowering began 10 days after light treatment.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Earliest flowering response was in 10 h photoperiod which occurred 10 d after light treatment”
t0“Stevia (Stevia rebaudiana Bertoni)”
Claim · model-written summary
At a 14-hour photoperiod, flowering time extended to 23 days.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“flowering time was extended to 23 d in the 14 h photoperiod”
t0“Stevia (Stevia rebaudiana Bertoni)”
Claim · model-written summary
Stevia under a 10-hour photoperiod had the largest flower count, 34 clusters.
- Treatment
- 10 h photoperiode0
- Outcome
- number of flowerse0
- Direction
- largeste0
- Value
- 34 flower clusters or capitulae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants subjected to the 10 h photoperiod had the largest number of flowers (34 flower clusters or capitula)”
t0“Stevia (Stevia rebaudiana Bertoni)”
Claim · model-written summary
The longest photoperiod produced the most leaves, 37.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the most number of leaves (37 leaves) was recorded in the longest photoperiod treatment”
t0“Stevia (Stevia rebaudiana Bertoni)”
Claim · model-written summary
Under a 10-hour photoperiod, stevia required 10 inductive cycles for flowering.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“stevia under a 10 h photoperiod requires 10 inductive cycles to induce flowering”
Claim · model-written summary
Photoperiod correlated positively with node number.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Photoperiod was found to have significant positive correlations with the number of nodes and flowering time”
t0“Stevia (Stevia rebaudiana Bertoni)”
Claim · model-written summary
Photoperiod correlated positively with flowering time.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Photoperiod was found to have significant positive correlations with the number of nodes and flowering time”
t0“Stevia (Stevia rebaudiana Bertoni)”