Abstract
Lipid transfer proteins (LTPs) participate in many important physiological processes in plants, including adaptation to stressors, e.g., salinity. Here we address the mechanism of this protective action of LTPs by studying the interaction between LTPs and abscisic acid (ABA, a "stress" hormone) and their mutual participation in suberin deposition in root endodermis of salt-stressed pea plants. Using immunohistochemistry we show for the first time NaCl induced accumulation of LTPs and ABA in the cell walls of phloem paralleled by suberin deposition in the endoderm region of pea roots. Unlike LTPs which were found localized around phloem cells, ABA was also present within phloem cells. In addition, ABA treatment resulted in both LTP and ABA accumulation in phloem cells and promoted root suberization. These results suggested the importance of NaCl-induced accumulation of ABA in increasing the abundance of LTPs and of suberin. Using molecular modeling and fluorescence spectroscopy we confirmed the ability of different plant LTPs, including pea Ps-LTP1, to bind ABA. We therefore hypothesize an involvement of plant LTPs in ABA transport (unloading from phloem) as part of the salinity adaptation mechanism.
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Claims 9
Claim · model-written summary
NaCl induced LTP accumulation in phloem cell walls of pea roots.
- Taxon
- pea
Lathyrus oleraceuse0 - Organ / stage
- cell walls of phloeme0
- Treatment
- NaCle0
- Gene
- LTPse0
- Outcome
- accumulation of LTPse0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Using immunohistochemistry we show for the first time NaCl induced accumulation of LTPs and ABA in the cell walls of phloem paralleled by suberin deposition in the endoderm region of pea roots.”
Claim · model-written summary
NaCl induced ABA accumulation in phloem cell walls of pea roots.
- Taxon
- peaLathyrus oleraceuse0
- Organ / stage
- cell walls of phloeme0
- Treatment
- NaCle0
- Outcome
- ABA in the cell walls of phloeme0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Using immunohistochemistry we show for the first time NaCl induced accumulation of LTPs and ABA in the cell walls of phloem paralleled by suberin deposition in the endoderm region of pea roots.”
Claim · model-written summary
NaCl-associated LTP and ABA accumulation paralleled endodermal suberin deposition.
- Taxon
- peaLathyrus oleraceuse0
- Organ / stage
- pea rootse0
- Outcome
- suberin deposition in the endoderm regione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Using immunohistochemistry we show for the first time NaCl induced accumulation of LTPs and ABA in the cell walls of phloem paralleled by suberin deposition in the endoderm region of pea roots.”
Claim · model-written summary
LTPs localized around phloem cells, whereas ABA was also inside those cells.
- Organ / stage
- phloem cellse0
- Outcome
- LTPs which were found localized around phloem cells, ABA was also present within phloem cellse0
Not reportedTaxon
Verbatim
e0“Unlike LTPs which were found localized around phloem cells, ABA was also present within phloem cells.”
Claim · model-written summary
ABA treatment increased LTP and ABA accumulation in phloem cells.
- Treatment
- ABA treatmente0
- Outcome
- LTP and ABA accumulation in phloem cellse0
- Direction
- increaseinferrede0
Not reportedTaxonComparator
Verbatim
e0“In addition, ABA treatment resulted in both LTP and ABA accumulation in phloem cells and promoted root suberization.”
Claim · model-written summary
ABA treatment promoted root suberization.
Not reportedTaxonComparator
Verbatim
e0“In addition, ABA treatment resulted in both LTP and ABA accumulation in phloem cells and promoted root suberization.”
Claim · model-written summary
The authors suggest NaCl-induced ABA accumulation increases LTP and suberin abundance.
- Outcome
- abundance of LTPs and of suberine0
- Direction
- increasinge0
- Qualifier
- NaCl-induced accumulation of ABAe0
Not reportedTaxon
Verbatim
e0“These results suggested the importance of NaCl-induced accumulation of ABA in increasing the abundance of LTPs and of suberin.”
Claim · model-written summary
Plant LTPs including pea Ps-LTP1 were able to bind ABA.
- Taxon
- peaLathyrus oleraceuse0
- Gene
- Ps-LTP1e0
- Compound
- ABAe0
- Outcome
- bind ABAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Using molecular modeling and fluorescence spectroscopy we confirmed the ability of different plant LTPs, including pea Ps-LTP1, to bind ABA.”
Claim · model-written summary
The authors hypothesize that plant LTPs transport ABA during salt adaptation.
Not reportedTaxon
Verbatim
e0“We therefore hypothesize an involvement of plant LTPs in ABA transport (unloading from phloem) as part of the salinity adaptation mechanism.”
The same questions in other papers
sodium chloride · molecular: metabolites · Lathyrus oleraceus (pea)Positive and negative results
1 paper in the same direction as this paper · 8 in the opposite direction
- negative
- negative
- negative
6 papers more in this group
See all 10 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.