Abstract
Cold acclimation of etiolated cucumber seedlings, consisting of cooling at 12 degrees C for 48 h followed by a warming period at 25 degrees C, led to tolerance to subsequent chilling at 2 degrees C. Tolerance, as evidenced by freedom from chilling injury and continued growth, developed during the warming period in a time-course manner for 12 h but decreased with prolonged warming. A similar increase and subsequent decrease was also observed in the content of palmitic, linoleic and linolenic acids in total lipid fraction from cucumber hypocotyl tissue. During the warming period supra-ambient oxygen stimulated, whereas subambient oxygen inhibited, the increase in fatty acid content as well as development of chilling tolerance. A strong correlation between oxygen-mediated changes in fatty acid content and associated development of cold tolerance suggests that both these processes are interrelated. Cold acclimation, but not cold stress, led to an increase followed by a decrease in CO2 evolution suggesting that a respiratory upsurge is yet another feature of cold acclimation in cucumbers.
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Claims 7
Claim · model-written summary
Cooling etiolated cucumber seedlings at 12 C for 48 h followed by warming at 25 C led to tolerance to subsequent chilling at 2 C.
- Taxon
- cucumber seedlings
Cucumis sativuse0 - Treatment
- cooling at 12 degrees C for 48 h followed by a warming period at 25 degrees Ce0
- Outcome
- tolerance to subsequent chilling at 2 degrees Ce0
- Direction
- increaseinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cold acclimation of etiolated cucumber seedlings, consisting of cooling at 12 degrees C for 48 h followed by a warming period at 25 degrees C, led to tolerance to subsequent chilling at 2 degrees C”
Claim · model-written summary
Chilling tolerance developed during the warming period over 12 h but decreased with prolonged warming.
- Taxon
- cucumber seedlingsCucumis sativuse0
- Outcome
- Tolerancee1
- Qualifier
- decreased with prolonged warminge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“etiolated cucumber seedlings”
e1“Tolerance, as evidenced by freedom from chilling injury and continued growth, developed during the warming period in a time-course manner for 12 h but decreased with prolonged warming”
Claim · model-written summary
Palmitic, linoleic and linolenic acid content in total lipid of cucumber hypocotyl tissue showed a similar increase then decrease.
- Taxon
- cucumberCucumis sativuse0
- Organ / stage
- hypocotyl tissuee0
- Outcome
- content of palmitic, linoleic and linolenic acidse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A similar increase and subsequent decrease was also observed in the content of palmitic, linoleic and linolenic acids in total lipid fraction from cucumber hypocotyl tissue”
Claim · model-written summary
Supra-ambient oxygen during warming stimulated the increase in fatty acid content and the development of chilling tolerance in cucumber seedlings.
- Taxon
- cucumber seedlingsCucumis sativuse0
- Treatment
- supra-ambient oxygene1
- Outcome
- increase in fatty acid content as well as development of chilling tolerancee1
- Direction
- stimulatede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“etiolated cucumber seedlings”
e1“supra-ambient oxygen stimulated, whereas subambient oxygen inhibited, the increase in fatty acid content as well as development of chilling tolerance”
Claim · model-written summary
Subambient oxygen during warming inhibited the increase in fatty acid content and the development of chilling tolerance in cucumber seedlings.
- Taxon
- cucumber seedlingsCucumis sativuse0
- Treatment
- subambient oxygene1
- Outcome
- increase in fatty acid content as well as development of chilling tolerancee1
- Direction
- inhibitede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“etiolated cucumber seedlings”
e1“supra-ambient oxygen stimulated, whereas subambient oxygen inhibited, the increase in fatty acid content as well as development of chilling tolerance”
Claim · model-written summary
Oxygen-mediated changes in fatty acid content strongly correlated with the associated development of cold tolerance, suggesting the processes are interrelated.
- Taxon
- cucumber seedlingsCucumis sativuse0
- Compound
- fatty acide1
- Outcome
- development of cold tolerancee1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“etiolated cucumber seedlings”
e1“A strong correlation between oxygen-mediated changes in fatty acid content and associated development of cold tolerance”
Claim · model-written summary
Cold acclimation, but not cold stress, led to an increase followed by a decrease in CO2 evolution in cucumber seedlings.
- Taxon
- cucumber seedlingsCucumis sativuse0
- Treatment
- Cold acclimatione1
- Outcome
- CO2 evolutione1
- Direction
- increase followed by a decreasee1
- Comparator
- cold stresse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“etiolated cucumber seedlings”
e1“Cold acclimation, but not cold stress, led to an increase followed by a decrease in CO2 evolution”
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