Abstract
Plants of Parkinsonia aculeata L. were dehydrated by withholding water for 13 days and then rehydrated. The leaves of control plants and stressed plants were analyzed every four days from the beginning of stress and 6, 24, and 48 h after stress relief. Analysis of leaf water status showed a decrease in relative water content of nearly 16% during dehydration and a return to its control value after 48 h of rehydration. The contents of chlorophylls, chloroplast lipids (monogalactosyldiacylglycerol and digalactosyldiacylglycerol), and neutral lipids increased by 38%, 20%, and 125% (in μg·mg dry mass −1 ), respectively, when the daily decrease of relative water content reached 1.4%, while the mass of extra-plastidial lipids (phosphatidylcholine and phosphatidylethanolamine) increased by 25% (in μg·mg dry mass −1 ) only when the daily water loss was 2.6%. In addition, incorporation of radioactive acetate in lipids showed a preferential synthesis of digalactosyldiacylglycerol, phosphatidylglycerol, and phosphatidylcholine. The unsaturation degree of galactolipids remained stable, while a slight increase of unsaturation of phosphatidylcholine and phosphatidylethanolamine was observed. After rehydration, the mass of chlorophylls fell sharply, while the amount of total lipids decreased slowly as the level remained 17% higher than in the control 6 h after stress relief. Our results show that Parkinsonia plants are sensitive to a slight variation of the water potential and respond with an increased synthesis of membrane lipids during stress and after rehydration.
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Claims 12
Claim · model-written summary
Relative water content decreased nearly 16 percent during dehydration.
- Taxon
- Parkinsonia aculeata
Parkinsonia aculeatat0 - Treatment
- dehydratione0
- Outcome
- relative water contente0
- Direction
- decreasee0
- Value
- nearly 16%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a decrease in relative water content of nearly 16% during dehydration”
t0“Parkinsonia aculeata”
Claim · model-written summary
Relative water content returned to control after 48 hours rehydration.
- Taxon
- Parkinsonia aculeataParkinsonia aculeatat0
- Treatment
- rehydratione0
- Outcome
- relative water contente0
- Direction
- returne0
- Value
- 48 he0
- Comparator
- control valuee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a decrease in relative water content of nearly 16% during dehydration and a return to its control value after 48 h of rehydration”
t0“Parkinsonia aculeata”
Claim · model-written summary
Chlorophyll content increased 38 percent at daily water content decline of 1.4 percent.
- Taxon
- Parkinsonia aculeataParkinsonia aculeatat0
- Treatment
- daily decrease of relative water content reached 1.4%e0
- Outcome
- contents of chlorophyllse0
- Direction
- increasede0
- Value
- 38%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The contents of chlorophylls, chloroplast lipids (monogalactosyldiacylglycerol and digalactosyldiacylglycerol), and neutral lipids increased by 38%, 20%, and 125% (in μg·mg dry mass −1 ), respectively, when the daily decrease of relative water content reached 1.4%”
t0“Parkinsonia aculeata”
Claim · model-written summary
Chloroplast lipid content increased 20 percent at daily water content decline of 1.4 percent.
- Taxon
- Parkinsonia aculeataParkinsonia aculeatat0
- Treatment
- daily decrease of relative water content reached 1.4%e0
- Outcome
- chloroplast lipidse0
- Direction
- increasede0
- Value
- 20%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The contents of chlorophylls, chloroplast lipids (monogalactosyldiacylglycerol and digalactosyldiacylglycerol), and neutral lipids increased by 38%, 20%, and 125% (in μg·mg dry mass −1 ), respectively, when the daily decrease of relative water content reached 1.4%”
t0“Parkinsonia aculeata”
Claim · model-written summary
Neutral lipid content increased 125 percent at daily water content decline of 1.4 percent.
- Taxon
- Parkinsonia aculeataParkinsonia aculeatat0
- Treatment
- daily decrease of relative water content reached 1.4%e0
- Outcome
- neutral lipidse0
- Direction
- increasede0
- Value
- 125%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The contents of chlorophylls, chloroplast lipids (monogalactosyldiacylglycerol and digalactosyldiacylglycerol), and neutral lipids increased by 38%, 20%, and 125% (in μg·mg dry mass −1 ), respectively, when the daily decrease of relative water content reached 1.4%”
t0“Parkinsonia aculeata”
Claim · model-written summary
Extra plastidial lipid mass increased 25 percent at 2.6 percent daily water loss.
- Taxon
- Parkinsonia aculeataParkinsonia aculeatat0
- Treatment
- daily water loss was 2.6%e0
- Outcome
- mass of extra-plastidial lipidse0
- Direction
- increasede0
- Value
- 25%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the mass of extra-plastidial lipids (phosphatidylcholine and phosphatidylethanolamine) increased by 25% (in μg·mg dry mass −1 ) only when the daily water loss was 2.6%”
t0“Parkinsonia aculeata”
Claim · model-written summary
Radioactive acetate incorporation indicated preferential synthesis of three lipids.
- Taxon
- Parkinsonia aculeataParkinsonia aculeatat0
- Outcome
- preferential synthesis of digalactosyldiacylglycerol, phosphatidylglycerol, and phosphatidylcholinee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“incorporation of radioactive acetate in lipids showed a preferential synthesis of digalactosyldiacylglycerol, phosphatidylglycerol, and phosphatidylcholine”
t0“Parkinsonia aculeata”
Claim · model-written summary
Galactolipid unsaturation remained stable.
- Taxon
- Parkinsonia aculeataParkinsonia aculeatat0
- Outcome
- unsaturation degree of galactolipidse0
- Direction
- remained stablee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The unsaturation degree of galactolipids remained stable”
t0“Parkinsonia aculeata”
Claim · model-written summary
Phosphatidylcholine and phosphatidylethanolamine unsaturation increased slightly.
- Taxon
- Parkinsonia aculeataParkinsonia aculeatat0
- Outcome
- unsaturation of phosphatidylcholine and phosphatidylethanolaminee0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a slight increase of unsaturation of phosphatidylcholine and phosphatidylethanolamine was observed”
t0“Parkinsonia aculeata”
Claim · model-written summary
Chlorophyll mass fell sharply after rehydration.
- Taxon
- Parkinsonia aculeataParkinsonia aculeatat0
- Treatment
- rehydratione0
- Outcome
- mass of chlorophyllse0
- Direction
- fell sharplye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After rehydration, the mass of chlorophylls fell sharply”
t0“Parkinsonia aculeata”
Claim · model-written summary
Total lipid amount decreased slowly after rehydration.
- Taxon
- Parkinsonia aculeataParkinsonia aculeatat0
- Treatment
- rehydratione0
- Outcome
- amount of total lipidse0
- Direction
- decreased slowlye0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After rehydration, the mass of chlorophylls fell sharply, while the amount of total lipids decreased slowly as the level remained 17% higher than in the control 6 h after stress relief”
t0“Parkinsonia aculeata”
Claim · model-written summary
Total lipids remained 17 percent above control six hours after stress relief.
- Taxon
- Parkinsonia aculeataParkinsonia aculeatat0
- Outcome
- the levele0
- Direction
- highere0
- Value
- 17%e0
- Qualifier
- 6 h after stress reliefe0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the level remained 17% higher than in the control 6 h after stress relief”
t0“Parkinsonia aculeata”