Abstract
L. amylacea, an ecotype arisen because of the seed selection practiced in this valley, shows a high tolerance to salt and B levels. In the present study the interaction between B and salt was studied after 20 days of treatment at low (100 mM) and high salinity (430 mM NaCl), assessing changes in nitrogen metabolites and in the activity of key nitrogen-assimilating enzymes. Under non-saline conditions, the presence of excessive B favored higher nitrate and ammonium mobilization to leaves, increasing nitrate reductase (NR) activity but not glutamine synthetase (GS). Thus, the increment of nitrogen use efficiency by B application would contribute partially to maintain the biomass production in this ecotype. Positive relationships between NR activity, nitrate, and stomatal conductance were observed in leaves. The increment of major amino acids alanine and serine would indicate a photoprotective role of photorespiration under low-salinity conditions, thus the inhibition of nitrogen assimilation pathway (NR and GS activities) occurred only at high salinity. The role of cytosolic GS regarding the proline accumulation is discussed.
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Claims 8
Claim · model-written summary
Excess B increased nitrate and ammonium mobilization to leaves without salinity.
- Treatment
- excessive Be0
- Outcome
- nitrate and ammonium mobilization to leavese0
- Direction
- highere0
- Qualifier
- non-saline conditionse0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under non-saline conditions, the presence of excessive B favored higher nitrate and ammonium mobilization to leaves, increasing nitrate reductase (NR) activity but not glutamine synthetase (GS).”
t0“Zea mays L. Amylacea”
Claim · model-written summary
Excess B increased nitrate reductase activity without salinity.
- Treatment
- excessive Be0
- Outcome
- nitrate reductase (NR) activitye0
- Direction
- increasinge0
- Qualifier
- non-saline conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under non-saline conditions, the presence of excessive B favored higher nitrate and ammonium mobilization to leaves, increasing nitrate reductase (NR) activity but not glutamine synthetase (GS).”
t0“Zea mays L. Amylacea”
Claim · model-written summary
Excess B did not increase glutamine synthetase activity without salinity.
- Treatment
- excessive Be0
- Outcome
- glutamine synthetase (GS)e0
- Direction
- note0
- Qualifier
- non-saline conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under non-saline conditions, the presence of excessive B favored higher nitrate and ammonium mobilization to leaves, increasing nitrate reductase (NR) activity but not glutamine synthetase (GS).”
t0“Zea mays L. Amylacea”
Claim · model-written summary
The authors infer that B enhanced nitrogen use efficiency partially sustains biomass.
- Treatment
- B applicatione0
- Outcome
- biomass productione0
- Direction
- maintaine0
- Qualifier
- nitrogen use efficiencye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Thus, the increment of nitrogen use efficiency by B application would contribute partially to maintain the biomass production in this ecotype.”
t0“Zea mays L. Amylacea”
Claim · model-written summary
NR activity, nitrate, and stomatal conductance were positively associated in leaves.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Positive relationships between NR activity, nitrate, and stomatal conductance were observed in leaves.”
t0“Zea mays L. Amylacea”
Claim · model-written summary
Alanine and serine increased under low salinity.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increment of major amino acids alanine and serine would indicate a photoprotective role of photorespiration under low-salinity conditions, thus the inhibition of nitrogen assimilation pathway (NR and GS activities) occurred only at high salinity.”
t0“Zea mays L. Amylacea”
Claim · model-written summary
The alanine and serine increase suggests a photoprotective role of photorespiration.
- Outcome
- photoprotective role of photorespiratione0
- Qualifier
- increment of major amino acids alanine and serinee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increment of major amino acids alanine and serine would indicate a photoprotective role of photorespiration under low-salinity conditions, thus the inhibition of nitrogen assimilation pathway (NR and GS activities) occurred only at high salinity.”
t0“Zea mays L. Amylacea”
Claim · model-written summary
High salinity inhibited NR and GS activities.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increment of major amino acids alanine and serine would indicate a photoprotective role of photorespiration under low-salinity conditions, thus the inhibition of nitrogen assimilation pathway (NR and GS activities) occurred only at high salinity.”
t0“Zea mays L. Amylacea”
The same questions in other papers
salinity · physiology: enzyme activity · Zea mays (maize)Positive and negative results
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See all 15 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.