Claim · model-written summary
Essential oil cultivar flowering was delayed 1–2 days above 13 h versus 12 h.
- Taxon
- hemp
Cannabis sativa subsp. sativat0 - Material
- essential oil cultivarse0
- Treatment
- photoperiod exceeded 13 he0
- Outcome
- floweringe0
- Direction
- delayede0
- Value
- 1–2 dayse0
- Comparator
- 12 he0
Not reportedGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The flowering of essential oil cultivars was generally delayed by 1–2 days when the photoperiod exceeded 13 h compared with 12 h”
t0“hemp (Cannabis sativa L.)”
Title
Mengzi Zhang; Steven L. Anderson; Zachary T. Brym; et al. Frontiers in Plant Science 2021. doi:10.3389/fpls.2021.694153
Other claims from this paper (14)
- Observation Critical photoperiod thresholds were identified for seven essential oil cultivars.
- Observation Critical photoperiod thresholds were identified for two fiber/grain cultivars.
- Observation Cherry Wine-CC, PUMA-3 and PUMA-4 had the shortest critical day length, 13 h 45 min to 14 h.
- Intervention effect Essential oil cultivar flowering was further delayed 7–8 days above 14 h.
- Intervention effect Fiber/grain cultivar flowering was delayed 1–3 days above 14 h.
- Intervention effect Most essential oil cultivars flowered 5–13 days later at 14 h than at 13 h 45 min.
- Observation Same-named cultivars from different sources performed differently under the same conditions.
- Association Average days to flower in fiber/grain cultivars correlated with reported cultivar origin.
- Observation Northern fiber/grain cultivars flowered faster than southern cultivars.
- Association Essential oil cultivar height generally increased with day length.
- Intervention effect Fiber/grain cultivar height was unaffected by day length.
- Observation Civil twilight near 2 μmol·m −2 ·s −1 regulated hemp flowering.
- Recommendation Most essential oil cultivars tested had suitable photoperiods for tropical and subtropical cultivation.
- Recommendation Some southern fiber/grain cultivars tested had suitable photoperiods for tropical and subtropical cultivation.