Abstract
Abstract The mechanism of selenium-mediated salt tolerance has not been fully clarified. This study investigated the possible role of selenium (Se) in regulating maize salt tolerance. A pot experiment was conducted to investigate the role of Se (0, 1, 5 and 25 μM Na 2 SeO 3 ) in photosynthesis, antioxidative capacity and ion homeostasis in maize under salinity. The results showed that Se (1 μM) relieved the salt-induced inhibitory effects on the plant growth and development of 15-day-old maize plants. Se application (1 μM) also increased the net photosynthetic rate and alleviated the damage to chloroplast ultrastructure induced by NaCl. The superoxide dismutase (SOD) and ascorbate peroxidase (APX) activities were increased, and ZmMPK5, ZmMPK7 and ZmCPK11 were markedly up-regulated in the roots of Se-treated plants, likely contributing to the improvement of antioxidant defence systems under salinity. Moreover, 1 μM Se increased K + in the shoots while decreasing Na + in the roots, indicating that Se up-regulates ZmNHX1 in the roots, which may be involved in Na + compartmentalisation under salinity. The findings from this single experiment require repetition together with measurement of reactive oxygen species (ROS), but nevertheless suggest that exogenous Se alleviates salt stress in maize via the improvement of photosynthetic capacity, the activities of antioxidant enzymes and the regulation of Na + homeostasis.
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 9
Claim · model-written summary
Selenium at 1 μM relieved the salt-induced inhibition of growth and development of 15-day-old maize plants in a pot experiment.
- Organ / stage
- 15-day-olde1
- Treatment
- Se (1 μM)e1
- Outcome
- plant growth and developmente1
- Direction
- relievede1
- Setting
- pot experimente7
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The results showed that Se (1 μM) relieved the salt-induced inhibitory effects on the plant growth and development of 15-day-old maize plants”
e7“A pot experiment was conducted”
Claim · model-written summary
Selenium application at 1 μM increased the net photosynthetic rate of salt-stressed maize.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in maize under salinity”
e2“Se application (1 μM) also increased the net photosynthetic rate and alleviated the damage to chloroplast ultrastructure induced by NaCl”
Claim · model-written summary
Selenium application at 1 μM alleviated the damage to chloroplast ultrastructure induced by NaCl in maize.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in maize under salinity”
e2“Se application (1 μM) also increased the net photosynthetic rate and alleviated the damage to chloroplast ultrastructure induced by NaCl”
Claim · model-written summary
Selenium-treated maize plants showed increased superoxide dismutase and ascorbate peroxidase activities.
- Treatment
- Se-treated plantse2
- Outcome
- superoxide dismutase (SOD) and ascorbate peroxidase (APX) activitiese1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in maize under salinity”
e1“The superoxide dismutase (SOD) and ascorbate peroxidase (APX) activities were increased”
e2“ZmMPK5, ZmMPK7 and ZmCPK11 were markedly up-regulated in the roots of Se-treated plants”
Claim · model-written summary
Selenium-treated maize roots showed marked up-regulation of ZmMPK5, ZmMPK7 and ZmCPK11.
- Organ / stage
- rootse2
- Treatment
- Se-treated plantse2
- Gene
- ZmMPK5, ZmMPK7 and ZmCPK11e2
- Outcome
- ZmMPK5, ZmMPK7 and ZmCPK11e2
- Direction
- markedly up-regulatede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in maize under salinity”
e2“ZmMPK5, ZmMPK7 and ZmCPK11 were markedly up-regulated in the roots of Se-treated plants”
Claim · model-written summary
1 μM selenium increased shoot K+ in salt-stressed maize.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in maize under salinity”
e3“Moreover, 1 μM Se increased K + in the shoots while decreasing Na + in the roots”
Claim · model-written summary
1 μM selenium decreased root Na+ in salt-stressed maize.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in maize under salinity”
e3“Moreover, 1 μM Se increased K + in the shoots while decreasing Na + in the roots”
Claim · model-written summary
Selenium may up-regulate ZmNHX1 in roots, which may be involved in Na+ compartmentalisation under salinity.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in maize under salinity”
e4“indicating that Se up-regulates ZmNHX1 in the roots, which may be involved in Na + compartmentalisation under salinity”
Claim · model-written summary
Exogenous selenium may alleviate salt stress in maize via improved photosynthetic capacity, a conclusion the authors flag for repetition.
- Treatment
- exogenous See5
- Outcome
- salt stresse5
- Qualifier
- via the improvement of photosynthetic capacitye5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“suggest that exogenous Se alleviates salt stress in maize via the improvement of photosynthetic capacity”
The same questions in other papers
selenium atom · growth · Zea mays (maize)Positive and negative results
10 papers in the same direction as this paper · 1 in the opposite direction
- positive
- positive
- positive
8 papers more in this group
See all 12 papers →selenium atom · physiology: photosynthesis · Zea mays (maize)Results agree
1 paper in the same direction as this paper
- positive
selenium atom · physiology: antioxidant enzymes · Zea mays (maize)Results agree
7 papers in the same direction as this paper
- positive
- positive
- positive
4 papers more in this group
See all 8 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.