Abstract
The effect of different concentrations of salicylic acid on total Kjeldahl nitrogen and nitrate reductase activity in the maize ( Zea mays L.) seedling was studied. The total nitrogen of the maize embryonic axis (root + shoot) from seedlings raised with 10 m M Ca(NO 3 ) 2 for 5 days was substantially higher than that from the control when 0.01 m M salicylic acid was supplied. As supply of high (1 m M ) concentrations of salicylic acid decreased the accumulation of organic nitrogen. The in vivo activity of nitrate reductase in the roots increased at low concentrations of salicylic acid, while high concentrations were inhibitory. The stimulative concentration of the acid protected in vivo loss of nitrate reductase activity under non‐inducing conditions, whereas it had no effect on in vitro loss of enzyme. It is suggested that salicylic acid increases in vivo enzyme activity indirectly, to some extent by protecting the natural inactivation of the enzyme.
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Claims 7
Claim · model-written summary
At 0.01 mM salicylic acid, total nitrogen in the maize embryonic axis was substantially higher than control.
- Organ / stage
- embryonic axis (root + shoot)e0
- Treatment
- 0.01 m M salicylic acide0
- Outcome
- total nitrogene0
- Direction
- highere0
- Comparator
- the controle0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total nitrogen of the maize embryonic axis (root + shoot) from seedlings raised with 10 m M Ca(NO 3 ) 2 for 5 days was substantially higher than that from the control when 0.01 m M salicylic acid was supplied”
Claim · model-written summary
High salicylic acid concentration decreased organic nitrogen accumulation.
- Treatment
- high (1 m M ) concentrations of salicylic acide0
- Outcome
- accumulation of organic nitrogene0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high (1 m M ) concentrations of salicylic acid decreased the accumulation of organic nitrogen”
e1“maize ( Zea mays L.) seedling”
Claim · model-written summary
Low salicylic acid concentrations increased root nitrate reductase activity in vivo.
- Organ / stage
- rootse0
- Treatment
- low concentrations of salicylic acide0
- Gene
- nitrate reductasee0
- Outcome
- in vivo activity of nitrate reductasee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The in vivo activity of nitrate reductase in the roots increased at low concentrations of salicylic acid”
e1“maize ( Zea mays L.) seedling”
Claim · model-written summary
High salicylic acid concentrations inhibited root nitrate reductase activity in vivo.
- Organ / stage
- rootse0
- Treatment
- high concentrationse0
- Outcome
- in vivo activity of nitrate reductasee0
- Direction
- inhibitorye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The in vivo activity of nitrate reductase in the roots increased at low concentrations of salicylic acid, while high concentrations were inhibitory”
e1“maize ( Zea mays L.) seedling”
Claim · model-written summary
The stimulatory acid concentration protected against in vivo loss of nitrate reductase activity under noninducing conditions.
- Treatment
- The stimulative concentration of the acide0
- Outcome
- in vivo loss of nitrate reductase activitye0
- Direction
- protectede0
- Qualifier
- non‐inducing conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The stimulative concentration of the acid protected in vivo loss of nitrate reductase activity under non‐inducing conditions”
e1“maize ( Zea mays L.) seedling”
Claim · model-written summary
The stimulatory acid concentration had no effect on in vitro enzyme loss.
- Treatment
- The stimulative concentration of the acide1
- Outcome
- in vitro loss of enzymee0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereas it had no effect on in vitro loss of enzyme”
e1“The stimulative concentration of the acid protected in vivo loss of nitrate reductase activity”
e2“maize ( Zea mays L.) seedling”
Claim · model-written summary
The authors suggest salicylic acid increases in vivo enzyme activity partly by protecting against natural inactivation.
- Treatment
- salicylic acide0
- Outcome
- in vivo enzyme activitye0
- Qualifier
- protecting the natural inactivation of the enzymee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salicylic acid increases in vivo enzyme activity indirectly, to some extent by protecting the natural inactivation of the enzyme”
e1“maize ( Zea mays L.) seedling”
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See all 24 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.