Abstract
Nitrogen stress as well as other stresses can negatively impact the plant development and metabolism. Generally, stress factors increase the reactive oxygen species (ROS) and methylglyoxal (MG) production, which may, in the absence of effective protective mechanisms, induce irreparable metabolic dysfunction and death. The effect of different amounts (from deficiency to excess) of nitrate, ammonium or nitrate combined to ammonium, on enzyme activities of antioxidant and methylglyoxal detoxification systems of two sorghum ecotypes (3P4 and 4P11) was studied. The N supply was performed per pot during the sowing step using potassium nitrate and/or ammonium sulfate. Six N treatments were applied using 120, 240 and 480 Kg ha -1 of ammonium or nitrate and three other treatments were applied using 120 kg ha-1 nitrate combined to 120, 240 and 480 kg ha -1 of ammonium. The specific activities of superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), glutathione reductase (GR), glyoxalase I (Gly I) and glyoxalase II (Gly II) were investigated. Results showed that, ammonium excess and N-deficient conditions increased the contents of malondialdehyde (MDA), and induced the enzyme activities of ROS and MG detoxification systems, supporting the sorghum's ability to counteract the negative effect of N stress (deficit and excess). We have also shown that the SOD, CAT, GR and Gly I enzyme activities were higher in the 4P11 ecotype compared to the 3P4 ecotype. These results indicate that sorghum ecotypes exhibit differential tolerance to N stress and suggest that the 4P11 ecotype has higher capacity to cope with N stress.
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Claims 7
Claim · model-written summary
Ammonium excess increased malondialdehyde content in sorghum.
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results showed that, ammonium excess and N-deficient conditions increased the contents of malondialdehyde (MDA), and induced the enzyme activities of ROS and MG detoxification systems”
t0“sorghum ecotypes”
Claim · model-written summary
Nitrogen deficiency increased malondialdehyde content in sorghum.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results showed that, ammonium excess and N-deficient conditions increased the contents of malondialdehyde (MDA), and induced the enzyme activities of ROS and MG detoxification systems”
t0“sorghum ecotypes”
Claim · model-written summary
Ammonium excess induced ROS and MG detoxification enzyme activities.
- Treatment
- ammonium excesse0
- Outcome
- enzyme activities of ROS and MG detoxification systemse0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results showed that, ammonium excess and N-deficient conditions increased the contents of malondialdehyde (MDA), and induced the enzyme activities of ROS and MG detoxification systems”
t0“sorghum ecotypes”
Claim · model-written summary
Nitrogen deficiency induced ROS and MG detoxification enzyme activities.
- Treatment
- N-deficient conditionse0
- Outcome
- enzyme activities of ROS and MG detoxification systemse0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results showed that, ammonium excess and N-deficient conditions increased the contents of malondialdehyde (MDA), and induced the enzyme activities of ROS and MG detoxification systems”
t0“sorghum ecotypes”
Claim · model-written summary
SOD, CAT and GR activities were higher in 4P11 than 3P4.
- Material
- 4P11 ecotypee0
- Outcome
- SOD, CAT, GR and Gly I enzyme activitiese0
- Direction
- highere0
- Comparator
- 3P4 ecotypee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We have also shown that the SOD, CAT, GR and Gly I enzyme activities were higher in the 4P11 ecotype compared to the 3P4 ecotype.”
t0“sorghum ecotypes”
Claim · model-written summary
Gly I activity was higher in 4P11 than 3P4.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We have also shown that the SOD, CAT, GR and Gly I enzyme activities were higher in the 4P11 ecotype compared to the 3P4 ecotype.”
t0“sorghum ecotypes”
Claim · model-written summary
The authors inferred greater nitrogen-stress coping capacity for 4P11.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These results indicate that sorghum ecotypes exhibit differential tolerance to N stress and suggest that the 4P11 ecotype has higher capacity to cope with N stress.”
The same questions in other papers
nitrogen · physiology: oxidative · SorghumResults differ
2 papers in the same direction as this paper
- positive
- positive
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.