Abstract
Exposure of cold-hardened seedlings of a range of winter cereals (11 winter wheats, 1 winter barley, and 1 winter rye) to a light intensity of 100 μE∙m −2 ∙s −1 during ice encasement at −1 °C markedly increased survival in comparison with that in dark ice encasement. Cold hardiness of 'Dover' winter barley and 'Fredrick' and 'Norstar' winter wheats was significantly greater after a short period of light ice encasement than dark ice encasement. Less ethanol and more CO 2 accumulated in plant crowns in light than dark ice, and lactic acid accumulated in the early days of ice encasement but was little influenced by light. There was greater utilization of total nonstructural carbohydrate in the crown in dark, than in light, and greater utilization of total nonstructural carbohydrate in ice than in air at −1 °C. Considerably less oxygen was consumed by plants in light than in dark ice, while leaves in aqueous solutions at −1 °C evolved significant levels of O 2 in light but consumed O 2 in the dark. It is proposed that the changes in metabolic components in light are associated with low-temperature photosynthesis, which provides cellular oxygen and greater levels of energy in support of cell maintenance in plants during ice encasement.
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Claims 9
Claim · model-written summary
Light during ice encasement increased winter cereal seedling survival relative to dark ice.
Verbatim
e0“Exposure of cold-hardened seedlings of a range of winter cereals (11 winter wheats, 1 winter barley, and 1 winter rye) to a light intensity of 100 μE∙m −2 ∙s −1 during ice encasement at −1 °C markedly increased survival in comparison with that in dark ice encasement”
Claim · model-written summary
Light ice encasement yielded greater cold hardiness for Dover barley and Fredrick and Norstar wheats.
- Taxon
- winter barley
.jpg?width=60)
Hordeum vulgaree0 - Material
- 'Dover'e0
- Treatment
- light ice encasemente0
- Outcome
- Cold hardinesse0
- Direction
- greatere0
- Comparator
- dark ice encasemente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Cold hardiness of 'Dover' winter barley and 'Fredrick' and 'Norstar' winter wheats was significantly greater after a short period of light ice encasement than dark ice encasement”
Claim · model-written summary
Less ethanol accumulated in crowns in light than dark ice.
Verbatim
e0“Less ethanol and more CO 2 accumulated in plant crowns in light than dark ice”
t0“winter cereal seedlings”
Claim · model-written summary
More CO2 accumulated in crowns in light than dark ice.
Verbatim
e0“Less ethanol and more CO 2 accumulated in plant crowns in light than dark ice”
t0“winter cereal seedlings”
Claim · model-written summary
Lactic acid accumulated early in ice encasement and was little influenced by light.
Verbatim
e0“lactic acid accumulated in the early days of ice encasement but was little influenced by light”
t0“winter cereal seedlings”
Claim · model-written summary
Crown nonstructural carbohydrate utilization was greater in dark than light ice.
Verbatim
e0“There was greater utilization of total nonstructural carbohydrate in the crown in dark, than in light”
t0“winter cereal seedlings”
Claim · model-written summary
Crown nonstructural carbohydrate utilization was greater in ice than air at minus 1 C.
Verbatim
e0“greater utilization of total nonstructural carbohydrate in ice than in air at −1 °C”
t0“winter cereal seedlings”
Claim · model-written summary
Plants consumed less oxygen in light than dark ice.
Verbatim
e0“Considerably less oxygen was consumed by plants in light than in dark ice”
t0“winter cereal seedlings”
Claim · model-written summary
Leaves in aqueous solution evolved oxygen in light but consumed it in darkness.
Verbatim
e0“leaves in aqueous solutions at −1 °C evolved significant levels of O 2 in light but consumed O 2 in the dark”
t0“winter cereal seedlings”
The same questions in other papers
light · tolerance: abiotic · Hordeum vulgare (barley)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
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.