Abstract
The heat stress-induced dehydrin proteins (DHNs) expression and their relationship with the water relations of sugarcane (Saccharum officinarum L.) leaves were studied. Sugarcane seedlings were subjected to heat stress (day/night temperature of 40/35 °C) under relative humidity 60/65 % to avoid aerial desiccation and determinations made at 4, 12, 24, 36, 48, 60 and 72 h. The leaves showed a sharp decline in the water and osmotic potentials, and relative water content during first 12 h of heat stress, but a regain in their values in 24 h. The pressure potential (ψp) decreased initially but increased later and approached control leaves. The increase in ψp was tightly correlated to the accumulation of free proline, glycinebetaine and soluble sugars, indicating their possible involvement in the osmotic adjustment under heat stress. Immunological detection revealed the expression of three DHNs with an apparent molecular mass of 21, 23 and 27 kDa under heat stress (48 to 72 h) and their expression was independent of the changes in the water relations of leaves.
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Claims 7
Claim · model-written summary
Leaf water potential, osmotic potential and relative water content declined during the first 12 hours of heat stress.
- Taxon
- sugarcanee0
- Organ / stage
- leavese2
- Treatment
- heat stresse2
- Outcome
- water and osmotic potentials, and relative water contente2
- Direction
- declinee2
- Qualifier
- first 12 he2
Not reportedComparator
Verbatim
e0“sugarcane (Saccharum officinarum L.) leaves”
e1“subjected to heat stress (day/night temperature of 40/35 °C)”
e2“The leaves showed a sharp decline in the water and osmotic potentials, and relative water content during first 12 h of heat stress”
Claim · model-written summary
Those leaf water measures regained their values at 24 hours.
Verbatim
e0“sugarcane (Saccharum officinarum L.) leaves”
e1“The leaves showed a sharp decline in the water and osmotic potentials, and relative water content during first 12 h of heat stress, but a regain in their values in 24 h”
Claim · model-written summary
Pressure potential decreased initially under heat stress.
Verbatim
e0“sugarcane (Saccharum officinarum L.) leaves”
e1“under heat stress (48 to 72 h)”
e2“The pressure potential (ψp) decreased initially but increased later and approached control leaves”
Claim · model-written summary
Pressure potential later increased toward the control leaf level.
Verbatim
e0“sugarcane (Saccharum officinarum L.) leaves”
e1“under heat stress (48 to 72 h)”
e2“The pressure potential (ψp) decreased initially but increased later and approached control leaves”
Claim · model-written summary
Increased pressure potential was tightly correlated with accumulation of free proline, glycinebetaine and soluble sugars.
Verbatim
e0“sugarcane (Saccharum officinarum L.) leaves”
e1“The increase in ψp was tightly correlated to the accumulation of free proline, glycinebetaine and soluble sugars”
Claim · model-written summary
Three dehydrin proteins of 21, 23 and 27 kDa were expressed after 48 to 72 hours of heat stress.
Verbatim
e0“sugarcane (Saccharum officinarum L.) leaves”
e1“expression of three DHNs with an apparent molecular mass of 21, 23 and 27 kDa under heat stress (48 to 72 h)”
Claim · model-written summary
Dehydrin expression was independent of changes in leaf water relations.
Not reportedDirection
Verbatim
e0“sugarcane (Saccharum officinarum L.) leaves”
e1“their expression was independent of the changes in the water relations of leaves”
e2“expression of three DHNs”
The same questions in other papers
heat · physiology: water · Saccharum officinarum (sugarcane)Results agree
1 paper in the same direction as this paper
- negative
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.