Claim · model-written summary
Each 2-hour increase in photoperiod increased dry matter at maturity by about 5 g per pot.
- Taxon
- rice
Oryza sativae0 - Treatment
- increase of 2 hours in photoperiode1
- Outcome
- dry mattere2
- Direction
- increasee1
- Value
- about 5 g per pote1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“how the rice plant responds to combinations of temperature and photoperiod”
e1“There was an increase of about 5 g per pot at maturity for each increase of 2 hours in photoperiod”
e2“Final dry matter production was high at 35/35 and 40.5/18; an increase of 3 to 8 g per pot was noted at these temperatures compared with 35/26.5 and 35/18”
Title
Photoperiod and temperature effects on the growth and development of rice (Oryza sativa L.)
Azmi, Abdul Razzaque cIRcle (University of British Columbia) 2011. doi:10.14288/1.0302466
Other claims from this paper (19)
- Intervention effect The photoperiod effect on flowering was most pronounced at 35/26.5 and was significant in all varieties at that temperature.
- Intervention effect At 35/26.5, 14-hour photoperiod delayed flowering by 30, 30, 21 and 63 days in Kangni, Caloro, Dokri and Bluebonnet compared with the optimum photoperiod.
- Intervention effect At 35/18, flowering was delayed by 23, 14, 6 and 2 days.
- Intervention effect At 35/18, Dokri and Bluebonnet showed no significant photoperiodic effect on flowering.
- Intervention effect At 35/35, flowering was most unsatisfactory; a similar but less serious effect was found at 40.5/18.
- Intervention effect Final dry matter production was higher at 35/35 and 40.5/18 by 3 to 8 g per pot than at 35/26.5 and 35/18.
- Intervention effect The 12-hour photoperiod gave panicles 2 to 4 cm longer than other photoperiods and 10 to 32 more spikelets per panicle at 10 and 12 hours than at 8 and 14 hours.
- Intervention effect Sterility was very high at 35/35 (95%) and 40.5/18 (69%), and averaged about 36% at 35/18 and 35/26.5.
- Intervention effect Between 10 and 12 hours of photoperiod, sterility was 8 to 24% lower than at 8 or 14 hours.
- Intervention effect Hundred-grain weight was unaffected by photoperiod or temperature.
- Intervention effect Tiller numbers were high at 40.5/18 and 35/18 and low at 35/35; plants at 14-hour photoperiod had more tillers.
- Intervention effect Leaf development was fastest at 40.5/18 and the 12-hour photoperiod; Kangni and Dokri developed faster than Caloro and Bluebonnet.
- Intervention effect Plant height was 2 to 5 cm greater at 2 weeks at 35/26.5 and 35/35, and greater at 35/18 at 4, 6 and 8 weeks; plants were shortest at 40.5/18.
- Observation Net photosynthesis per leaf blade weight was highest at 2 weeks and declined with plant age, by 71% in Dokri over 2 to 8 weeks.
- Intervention effect Net photosynthesis was highest at 40.5/18 except at 2 weeks, and higher in Caloro and Bluebonnet than in Kangni and Dokri.
- Observation Chlorophyll and carotenoid content declined with age in all varieties and were high at 40.5/18.
- Association A definite correlation between chlorophyll content and photosynthesis was not shown, but chlorophyll correlated significantly with fresh weight at all temperatures and photoperiods except at 2 weeks.
- Observation Total water soluble carbohydrate and total ash content showed no definite trends with growth stage, and no relationship with floral initiation.
- Intervention effect The rate of photosynthesis was consistently higher in the 8-hour photoperiod, by 28 and 25% over the 14-hour photoperiod at 6 and 8 weeks.