Abstract
Abstract Background Soil salt stress is a problem in the world, which turns into one of the main limiting factors hindering maize production. Salinity significantly affects root physiological processes in maize plants. There are few studies, however, that analyses the response of maize to salt stress in terms of the development of root anatomy and respiration. Results We found that the leaf relative water content, photosynthetic characteristics, and catalase activity exhibited a significantly decrease of salt stress treatments. However, salt stress treatments caused the superoxide dismutase activity, peroxidase activity, malondialdehyde content, Na + uptake and translocation rate to be higher than that of control treatments. The detrimental effect of salt stress on YY7 variety was more pronounced than that of JNY658. Under salt stress, the number of root cortical aerenchyma in salt-tolerant JNY658 plants was significantly higher than that of control, as well as a larger cortical cell size and a lower root cortical cell file number, all of which help to maintain higher biomass. The total respiration rate of two varieties exposed to salt stress was lower than that of control treatment, while the alternate oxidative respiration rate was higher, and the root response of JNY658 plants was significant. Under salt stress, the roots net Na + and K + efflux rates of two varieties were higher than those of the control treatment, where the strength of net Na + efflux rate from the roots of JNY658 plants and the net K + efflux rate from roots of YY7 plants was remarkable. The increase in efflux rates reduced the Na + toxicity of the root and helped to maintain its ion balance. Conclusion These results demonstrated that salt-tolerant maize varieties incur a relatively low metabolic cost required to establish a higher root cortical aerenchyma, larger cortical cell size and lower root cortical cell file number, significantly reduced the total respiration rate, and that it also increased the alternate oxidative respiration rate, thereby counteracting the detrimental effect of oxidative damage on root respiration of root growth. In addition, Na + uptake on the root surface decreased, the translocation of Na + to the rest of the plant was constrained and the level of Na + accumulation in leaves significantly reduced under salt stress, thus preempting salt-stress induced impediments to the formation of shoot biomass.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 11
Claim · model-written summary
Salt stress decreased maize leaf relative water content, photosynthetic characteristics and catalase activity.
- Treatment
- salt stress treatmentse0
- Outcome
- leaf relative water content, photosynthetic characteristics, and catalase activitye0
- Direction
- decreasee0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the leaf relative water content, photosynthetic characteristics, and catalase activity exhibited a significantly decrease of salt stress treatments”
t0“Maize”
Claim · model-written summary
Salt stress raised superoxide dismutase and peroxidase activities and malondialdehyde content.
- Treatment
- salt stress treatmentse0
- Outcome
- superoxide dismutase activity, peroxidase activity, malondialdehyde contente0
- Direction
- highere0
- Comparator
- control treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salt stress treatments caused the superoxide dismutase activity, peroxidase activity, malondialdehyde content, Na + uptake and translocation rate to be higher than that of control treatments”
t0“Maize”
Claim · model-written summary
Salt stress raised Na+ uptake and translocation relative to controls.
- Treatment
- salt stress treatmentse0
- Outcome
- Na + uptake and translocation ratee0
- Direction
- highere0
- Comparator
- control treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salt stress treatments caused the superoxide dismutase activity, peroxidase activity, malondialdehyde content, Na + uptake and translocation rate to be higher than that of control treatments”
t0“Maize”
Claim · model-written summary
Salt injury was more pronounced in YY7 than JNY658.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The detrimental effect of salt stress on YY7 variety was more pronounced than that of JNY658”
t0“Maize”
Claim · model-written summary
Salt stress increased root cortical aerenchyma number in JNY658.
- Material
- JNY658e0
- Treatment
- salt stresse0
- Outcome
- number of root cortical aerenchymae0
- Direction
- highere0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under salt stress, the number of root cortical aerenchyma in salt-tolerant JNY658 plants was significantly higher than that of control”
t0“Maize”
Claim · model-written summary
Under salt stress, JNY658 had larger cortical cells and fewer root cortical cell files.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salt-tolerant JNY658 plants was significantly higher than that of control, as well as a larger cortical cell size and a lower root cortical cell file number, all of which help to maintain higher biomass”
t0“Maize”
Claim · model-written summary
Salt stress lowered total respiration rates in both maize varieties.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total respiration rate of two varieties exposed to salt stress was lower than that of control treatment”
t0“Maize”
Claim · model-written summary
Salt stress raised alternate oxidative respiration rates in both varieties.
- Material
- JNY658e0
- Treatment
- salt stresse0
- Outcome
- alternate oxidative respiration ratee0
- Direction
- highere0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two varieties exposed to salt stress was lower than that of control treatment, while the alternate oxidative respiration rate was higher, and the root response of JNY658 plants was significant”
t0“Maize”
Claim · model-written summary
Salt stress raised root net Na+ and K+ efflux rates in both maize varieties.
- Treatment
- salt stresse0
- Outcome
- roots net Na + and K + efflux ratese0
- Direction
- highere0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under salt stress, the roots net Na + and K + efflux rates of two varieties were higher than those of the control treatment”
t0“Maize”
Claim · model-written summary
The authors infer that increased ion efflux reduced root Na+ toxicity and maintained ion balance.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in efflux rates reduced the Na + toxicity of the root and helped to maintain its ion balance”
t0“Maize”
Claim · model-written summary
The authors report decreased root-surface Na+ uptake, constrained translocation and reduced leaf Na+ accumulation under salt stress.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Na + uptake on the root surface decreased, the translocation of Na + to the rest of the plant was constrained and the level of Na + accumulation in leaves significantly reduced under salt stress”
t0“Maize”
The same questions in other papers
salinity · nutrient: content · Zea mays (maize)Results differ
50 papers in the same direction as this paper · 3 in the opposite direction
- negative
- positive
- positive
50 papers more in this group
See all 54 papers →salinity · physiology: photosynthesis · Zea mays (maize)Results differ
57 papers in the same direction as this paper · 1 in the opposite direction
- negative
- negative
- positive
55 papers more in this group
See all 59 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.