Abstract
The presence of aluminum (Al) in acidic soils is a major abiotic stress limiting the production of cultivated plants. Cell membranes are the main targets of environmental stresses and there is growing evidence for the involvement of membrane lipids in plant adaptation. The aim of this study was to evaluate the mid-long effects of Al on membrane lipid content and composition in the roots and shoots of rice plants grown under hydroponic conditions. Four rice cultivars were compared: two acknowledged as Al-resistant (Koshihikari) and Al-sensitive (Kasalath), respectively, and two Vietnamese cultivars, OM6073 and OM1490. Al treatment inhibited root and shoot growth in the sensitive cultivars and the observed changes in root and shoot lipid and fatty acid composition revealed patterns associated with Al sensitivity: larger decreases in lipid content and decreases in fatty acid unsaturation. In the roots, phospholipids, and particularly phosphatidylcholine (PC), decreased dramatically in the susceptible cultivars whereas the amount of lipid classes remained unchanged in the tolerant ones. In the shoots, the glycolipids monogalactosyldiacylglycerol and digalactosyldiacylglycerol as well as PC were mostly affected by Al treatment in the susceptible varieties. mRNA accumulation corresponding to genes coding for galactolipid synthases, enzymes of the PC and phosphatidylethanolamine biosynthetic pathways and fatty acid desaturases correlated well with changes in lipid contents in roots and partly explained lipid changes in leaves. The results suggested that the capacity to maintain the proper functioning of some lipid biosynthetic activities and hence the stability of lipid composition may help the rice plant to withstand Al stress.
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Claims 9
Claim · model-written summary
Aluminum inhibited root and shoot growth in sensitive rice cultivars.
- Taxon
- rice
Oryza sativat0 - Material
- sensitive cultivarse0
- Treatment
- Al treatmente0
- Outcome
- root and shoot growthe0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Al treatment inhibited root and shoot growth in the sensitive cultivars”
t0“rice”
Claim · model-written summary
Sensitive cultivars showed larger decreases in root and shoot lipid content under aluminum.
- Taxon
- riceOryza sativat0
- Organ / stage
- root and shoote0
- Treatment
- Ale0
- Outcome
- lipid contente0
- Direction
- larger decreasese0
- Qualifier
- Al sensitivitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the observed changes in root and shoot lipid and fatty acid composition revealed patterns associated with Al sensitivity: larger decreases in lipid content”
t0“rice”
Claim · model-written summary
Sensitive cultivars showed decreased fatty acid unsaturation under aluminum.
- Taxon
- riceOryza sativat0
- Treatment
- Ale0
- Outcome
- fatty acid unsaturatione0
- Direction
- decreasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“patterns associated with Al sensitivity: larger decreases in lipid content and decreases in fatty acid unsaturation”
t0“rice”
Claim · model-written summary
Root phospholipids, especially phosphatidylcholine, decreased dramatically in susceptible cultivars.
- Taxon
- riceOryza sativat0
- Organ / stage
- rootse0
- Outcome
- phospholipids, and particularly phosphatidylcholine (PC)e0
- Direction
- decreased dramaticallye0
- Comparator
- tolerant onese0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the roots, phospholipids, and particularly phosphatidylcholine (PC), decreased dramatically in the susceptible cultivars whereas the amount of lipid classes remained unchanged in the tolerant ones”
t0“rice”
Claim · model-written summary
Root lipid classes remained unchanged in tolerant cultivars.
- Taxon
- riceOryza sativat0
- Material
- tolerant onese0
- Outcome
- lipid classese0
- Direction
- remained unchangede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the amount of lipid classes remained unchanged in the tolerant ones”
t0“rice”
Claim · model-written summary
Shoot monogalactosyldiacylglycerol, digalactosyldiacylglycerol and PC were affected by aluminum in susceptible varieties.
- Taxon
- riceOryza sativat0
- Organ / stage
- shootse0
- Treatment
- Al treatmente0
- Outcome
- monogalactosyldiacylglycerol and digalactosyldiacylglycerol as well as PCe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the shoots, the glycolipids monogalactosyldiacylglycerol and digalactosyldiacylglycerol as well as PC were mostly affected by Al treatment in the susceptible varieties”
t0“rice”
Claim · model-written summary
Lipid biosynthesis gene transcript accumulation correlated with root lipid content changes.
- Taxon
- riceOryza sativat0
- Gene
- genes coding for galactolipid synthases, enzymes of the PC and phosphatidylethanolamine biosynthetic pathways and fatty acid desaturasese0
- Outcome
- changes in lipid contents in rootse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mRNA accumulation corresponding to genes coding for galactolipid synthases, enzymes of the PC and phosphatidylethanolamine biosynthetic pathways and fatty acid desaturases correlated well with changes in lipid contents in roots”
t0“rice”
Claim · model-written summary
Lipid biosynthesis gene transcript accumulation partly explained leaf lipid changes.
- Taxon
- riceOryza sativat0
- Gene
- genes coding for galactolipid synthases, enzymes of the PC and phosphatidylethanolamine biosynthetic pathways and fatty acid desaturasese0
- Outcome
- lipid changes in leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mRNA accumulation corresponding to genes coding for galactolipid synthases, enzymes of the PC and phosphatidylethanolamine biosynthetic pathways and fatty acid desaturases correlated well with changes in lipid contents in roots and partly explained lipid changes in leaves”
t0“rice”
Claim · model-written summary
Maintenance of lipid biosynthesis and lipid composition may help rice withstand aluminum stress.
- Taxon
- riceOryza sativae0
- Outcome
- withstand Al stresse0
- Qualifier
- stability of lipid compositione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the capacity to maintain the proper functioning of some lipid biosynthetic activities and hence the stability of lipid composition may help the rice plant to withstand Al stress”
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