Claim · model-written summary
Ecotype OK reached an LT50 of -31.2°C.
Poa annuaNot reportedGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Poa annua L.”
e1“annual bluegrass achieved high levels of freezing tolerance with LT 50 of −31.2°C for OK, −24.6°C for CO, and −22.8°C for CR”
Title
Julie Dionne; Yves Castonguay; Paul Nadeau; et al. Crop Science 2001. doi:10.2135/cropsci2001.412443x
Other claims from this paper (10)
- Observation The three annual bluegrass ecotypes differed significantly in freezing tolerance (LT50 ranking OK < CO < CR).
- Observation The relative freezing tolerance ranking of the ecotypes was maintained under both environmentally controlled and simulated winter conditions.
- Observation Maximum freezing tolerance was observed after exposure to nonlethal subfreezing temperatures.
- Observation Ecotype CO reached an LT50 of -24.6°C.
- Observation Ecotype CR reached an LT50 of -22.8°C.
- Observation High molecular weight fructans (DP>6) were the most abundant carbohydrates in annual bluegrass cold-acclimated under low, nonfreezing temperature.
- Intervention effect Fructan levels reached up to 170 mg g-1 dry weight in cold-acclimated plants compared with 60 to 70 mg g-1 dry weight in nonacclimated plants.
- Observation Sucrose levels in crowns of annual bluegrass markedly increased at temperatures below freezing.
- Observation Maximum sucrose concentration coincided with maximum freezing tolerance of annual bluegrass.
- Association Variations in fructan and sucrose levels were not related to differential freezing tolerance among the three annual bluegrass ecotypes.