Abstract
We conducted a coordinated biochemical and morphometric analysis of the effect of saline conditions on the differentiation zone of developing soybean (Glycine max L.) roots. Between d 3 and d 14 for seedlings grown in control or NaCl-supplemented medium, we studied (a) the temporal evolution of the respiratory alternative oxidase (AOX) capacity in correlation with the expression and localization of AOX protein analyzed by tissue-print immunoblotting; (b) the temporal evolution and tissue localization of a peroxidase activity involved in lignification; and (c) the structural changes, visualized by light microscopy and quantified by image digitization. The results revealed that saline stress retards primary xylem differentiation. There is a corresponding delay in the temporal pattern of AOX expression, which is consistent with the xylem-specific localization of AOX protein and the idea that this enzyme is linked to xylem development. An NaCl-induced acceleration of the development of secondary xylem was also observed. However, the temporal pattern of a peroxidase activity localized in the primary and secondary xylem was unaltered by NaCl treatment. Thus, the NaCl-stressed root was specifically affected in the temporal patterns of AOX expression and xylem development.
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Claims 5
Claim · model-written summary
Saline stress retarded primary xylem differentiation.
- Taxon
- soybean
Glycine maxt0 - Organ / stage
- primary xyleme0
- Treatment
- saline stresse0
- Outcome
- primary xylem differentiatione0
- Direction
- retardse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“saline stress retards primary xylem differentiation”
t0“soybean Roots1”
Claim · model-written summary
Saline stress delayed the temporal pattern of AOX expression.
- Taxon
- soybeanGlycine maxt0
- Treatment
- saline stresst1
- Gene
- AOXe0
- Outcome
- temporal pattern of AOX expressione0
- Direction
- delaye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There is a corresponding delay in the temporal pattern of AOX expression”
t0“soybean Roots1”
t1“Saline Stress”
Claim · model-written summary
AOX protein localized specifically to xylem.
- Taxon
- soybeanGlycine maxt0
- Gene
- AOX proteine0
- Outcome
- xylem-specific localization of AOX proteine0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“xylem-specific localization of AOX protein”
t0“soybean Roots1”
Claim · model-written summary
NaCl accelerated secondary xylem development.
- Taxon
- soybeanGlycine maxt0
- Treatment
- NaCle0
- Outcome
- development of secondary xyleme0
- Direction
- acceleratione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An NaCl-induced acceleration of the development of secondary xylem was also observed”
t0“soybean Roots1”
Claim · model-written summary
NaCl left the temporal pattern of xylem peroxidase activity unaltered.
- Taxon
- soybeanGlycine maxt0
- Treatment
- NaCl treatmente0
- Gene
- peroxidasee0
- Outcome
- temporal pattern of a peroxidase activitye0
- Direction
- unalterede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the temporal pattern of a peroxidase activity localized in the primary and secondary xylem was unaltered by NaCl treatment”
t0“soybean Roots1”
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