Abstract
During a 5 degree C and a 5/-1 degree C cold acclimation (CA) regime there was a significant decline in the water potential of winter barley, and a concurrent decline in tissue water content of the 5/-1 degree C CA plants. Results of carbohydrate analysis illustrated a significant (P < 0.001) accumulation of sucrose, fructose and glucose in the 5/-1 degree C CA plants, which was inversely correlated to water potential. Using an infrared imaging radiometer during a convection frost test the water release time (WRT) of 5/-1 degree C CA was demonstrated to be significantly (P < 0.001) longer than that observed in non-cold acclimated plants. This observation is consistent with visual analysis of exotherm curves where the rate of cellular water release to extracellular ice is reduced in the 5/-1 degree C CA plants, compared to the non-cold acclimated plants. These biochemical and physiological changes were correlated to increased plant health following a non-lethal freezing test to -5 degree C, where non-cold acclimated plants produced 2.3 +/- 0.3 tillers and 5 degree C and 5/-1 degree C CA plants produced 2.4 +/- 0.3 and 4.7 +/- 0.7 tillers, respectively. Results from this study imply that cold acclimation leads to changes in the physical state of water that result in a less osmotically responsive cellular environment and subsequently significantly less damage to meristematic tissue.
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Claims 12
Claim · model-written summary
Cold acclimation significantly reduced winter barley water potential.
- Taxon
- winter barley
.jpg?width=60)
Hordeum vulgaree0 - Treatment
- 5 degree C and a 5/-1 degree C cold acclimation (CA) regimee0
- Outcome
- water potentiale0
- Direction
- declinee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“During a 5 degree C and a 5/-1 degree C cold acclimation (CA) regime there was a significant decline in the water potential of winter barley”
Claim · model-written summary
The 5/-1 degree C cold acclimation regime reduced barley tissue water content.
- Taxon
- Hordeum vulgare L.Hordeum vulgaret0
- Treatment
- 5/-1 degree C CAe0
- Outcome
- tissue water contente0
- Direction
- declinee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a concurrent decline in tissue water content of the 5/-1 degree C CA plants”
t0“Hordeum vulgare L.”
Claim · model-written summary
Sucrose accumulated significantly in barley at 5/-1 degree C cold acclimation.
- Taxon
- Hordeum vulgare L.Hordeum vulgaret0
- Treatment
- 5/-1 degree C CAe0
- Outcome
- sucrosee0
- Direction
- accumulatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a significant (P < 0.001) accumulation of sucrose, fructose and glucose in the 5/-1 degree C CA plants”
t0“Hordeum vulgare L.”
Claim · model-written summary
Fructose accumulated significantly in barley at 5/-1 degree C cold acclimation.
- Taxon
- Hordeum vulgare L.Hordeum vulgaret0
- Treatment
- 5/-1 degree C CAe0
- Outcome
- fructosee0
- Direction
- accumulatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a significant (P < 0.001) accumulation of sucrose, fructose and glucose in the 5/-1 degree C CA plants”
t0“Hordeum vulgare L.”
Claim · model-written summary
Glucose accumulated significantly in barley at 5/-1 degree C cold acclimation.
- Taxon
- Hordeum vulgare L.Hordeum vulgaret0
- Treatment
- 5/-1 degree C CAe0
- Outcome
- glucosee0
- Direction
- accumulatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a significant (P < 0.001) accumulation of sucrose, fructose and glucose in the 5/-1 degree C CA plants”
t0“Hordeum vulgare L.”
Claim · model-written summary
Sugar accumulation was inversely correlated with barley water potential.
- Taxon
- Hordeum vulgare L.Hordeum vulgaret0
- Compound
- sucrose, fructose and glucosee0
- Outcome
- water potentiale0
- Direction
- inversely correlatede0
- Qualifier
- 5/-1 degree C CA plantse0
Not reportedOrgan / stage
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“accumulation of sucrose, fructose and glucose in the 5/-1 degree C CA plants, which was inversely correlated to water potential”
t0“Hordeum vulgare L.”
Claim · model-written summary
Water release time was significantly longer in 5/-1 degree C acclimated barley than unacclimated barley.
- Taxon
- Hordeum vulgare L.Hordeum vulgaret0
- Treatment
- 5/-1 degree C CAe0
- Outcome
- water release time (WRT)e0
- Direction
- longere0
- Comparator
- non-cold acclimated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the water release time (WRT) of 5/-1 degree C CA was demonstrated to be significantly (P < 0.001) longer than that observed in non-cold acclimated plants”
t0“Hordeum vulgare L.”
Claim · model-written summary
Cellular water release to extracellular ice was slower in 5/-1 degree C acclimated barley.
- Taxon
- Hordeum vulgare L.Hordeum vulgaret0
- Treatment
- 5/-1 degree C CAe0
- Outcome
- rate of cellular water release to extracellular icee0
- Direction
- reducede0
- Comparator
- non-cold acclimated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the rate of cellular water release to extracellular ice is reduced in the 5/-1 degree C CA plants, compared to the non-cold acclimated plants”
t0“Hordeum vulgare L.”
Claim · model-written summary
Nonacclimated barley produced 2.3 +/- 0.3 tillers after freezing.
- Taxon
- Hordeum vulgare L.Hordeum vulgaret0
- Outcome
- tillerse0
- Value
- 2.3 +/- 0.3e0
- Qualifier
- non-cold acclimated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“non-cold acclimated plants produced 2.3 +/- 0.3 tillers”
t0“Hordeum vulgare L.”
Claim · model-written summary
Barley acclimated at 5 degree C produced 2.4 +/- 0.3 tillers after freezing.
- Taxon
- Hordeum vulgare L.Hordeum vulgaret0
- Treatment
- 5 degree Ce0
- Outcome
- tillerse0
- Value
- 2.4 +/- 0.3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“5 degree C and 5/-1 degree C CA plants produced 2.4 +/- 0.3 and 4.7 +/- 0.7 tillers, respectively”
t0“Hordeum vulgare L.”
Claim · model-written summary
Barley acclimated at 5/-1 degree C produced 4.7 +/- 0.7 tillers after freezing.
- Taxon
- Hordeum vulgare L.Hordeum vulgaret0
- Treatment
- 5/-1 degree C CAe0
- Outcome
- tillerse0
- Value
- 4.7 +/- 0.7e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“5 degree C and 5/-1 degree C CA plants produced 2.4 +/- 0.3 and 4.7 +/- 0.7 tillers, respectively”
t0“Hordeum vulgare L.”
Claim · model-written summary
The authors infer that acclimation changes the physical state of barley water and reduces meristem damage.
- Taxon
- Hordeum vulgare L.Hordeum vulgaret0
- Treatment
- cold acclimatione0
- Outcome
- less damage to meristematic tissuee0
- Qualifier
- changes in the physical state of watere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cold acclimation leads to changes in the physical state of water that result in a less osmotically responsive cellular environment and subsequently significantly less damage to meristematic tissue”
t0“Hordeum vulgare L.”
The same questions in other papers
cold · molecular: metabolites · Hordeum vulgare (barley)Positive and negative results
8 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- no effect
- positive
7 papers more in this group
See all 11 papers →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.