Abstract
Effects of exogenous melatonin(MT) on the nitrogen metabolism under high temperature stress were investigated in cucumber seedlings,including a heat-sensitive cultivar(‘Jinyou No.4’) and a heat-tolerant cultivar(‘American Baoer’).The results showed that under the stress of high temperature,the nitrate content in leaves of both cucumber cultivars increased firstly and then declined later.The total nitrogen or ammonium content in the leaves of ‘Jinyou No.4’ declined firstly but increased constantly in ‘American Baoer’.The activity of nitrate reductase(NR) increased firstly but then decreased later in the leaves of both cucumber cultivars,but the activities of glutamate synthase(GS),glutamine synthetase(GOGAT) and glutamate dehydrogenase(GDH) decreased continually.All of the four enzyme activities in ‘American Baoer’ decreased slower than those in ‘Jinyou No.4’.The exogenous MT could significantly increase the activities of NR,GS,GOGAT and GDH,increased the nitrate content and restrained the accumulation of ammonium content under high temperature stress.These results indicate that exogenous MT could enhance the nitrogen metabolism of cucumber,reduce the damage of high temperature to the plants,and improve the resistance of cucumber seedlings against high temperature stress.
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Claims 11
Claim · model-written summary
Under high temperature stress, leaf nitrate content of both cucumber cultivars first increased and then declined.
- Taxon
- cucumber
Cucumis sativuse0 - Treatment
- stress of high temperaturee0
- Outcome
- nitrate content in leavese0
- Direction
- increased firstly and then declinede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under the stress of high temperature,the nitrate content in leaves of both cucumber cultivars increased firstly and then declined later”
Claim · model-written summary
Leaf total nitrogen or ammonium content of Jinyou No.4 declined first under high temperature.
- Taxon
- cucumberCucumis sativuse0
- Material
- Jinyou No.4e1
- Outcome
- total nitrogen or ammonium contente1
- Direction
- declined firstlye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under the stress of high temperature,the nitrate content in leaves of both cucumber cultivars increased firstly and then declined later”
e1“The total nitrogen or ammonium content in the leaves of ‘Jinyou No.4’ declined firstly but increased constantly in ‘American Baoer’”
Claim · model-written summary
Leaf total nitrogen or ammonium content of American Baoer increased constantly under high temperature.
- Taxon
- cucumberCucumis sativuse0
- Material
- American Baoere1
- Outcome
- total nitrogen or ammonium contente1
- Direction
- increased constantlye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under the stress of high temperature,the nitrate content in leaves of both cucumber cultivars increased firstly and then declined later”
e1“The total nitrogen or ammonium content in the leaves of ‘Jinyou No.4’ declined firstly but increased constantly in ‘American Baoer’”
Claim · model-written summary
Nitrate reductase activity in both cucumber cultivars first increased and then decreased under high temperature.
- Taxon
- cucumberCucumis sativuse2
- Material
- both cucumber cultivarse2
- Outcome
- activity of nitrate reductase(NR)e2
- Direction
- increased firstly but then decreased latere2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“The activity of nitrate reductase(NR) increased firstly but then decreased later in the leaves of both cucumber cultivars”
Claim · model-written summary
Glutamate synthase, glutamine synthetase and glutamate dehydrogenase activities in cucumber leaves decreased continually under high temperature.
- Taxon
- cucumberCucumis sativuse0
- Outcome
- activities of glutamate synthase(GS),glutamine synthetase(GOGAT) and glutamate dehydrogenase(GDH)e3
- Direction
- decreased continuallye3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under the stress of high temperature,the nitrate content in leaves of both cucumber cultivars increased firstly and then declined later”
e3“the activities of glutamate synthase(GS),glutamine synthetase(GOGAT) and glutamate dehydrogenase(GDH) decreased continually”
Claim · model-written summary
The four enzyme activities in American Baoer decreased more slowly than in Jinyou No.4 under high temperature.
- Taxon
- cucumberCucumis sativuse0
- Material
- American Baoere4
- Outcome
- All of the four enzyme activitiese4
- Direction
- decreased slowere4
- Comparator
- Jinyou No.4e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under the stress of high temperature,the nitrate content in leaves of both cucumber cultivars increased firstly and then declined later”
e4“All of the four enzyme activities in ‘American Baoer’ decreased slower than those in ‘Jinyou No.4’”
Claim · model-written summary
Exogenous melatonin significantly increased the activities of NR, GS, GOGAT and GDH in cucumber under high temperature stress.
- Taxon
- cucumberCucumis sativuse6
- Treatment
- exogenous MTe5
- Outcome
- activities of NR,GS,GOGAT and GDHe5
- Direction
- increasee5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“The exogenous MT could significantly increase the activities of NR,GS,GOGAT and GDH,increased the nitrate content and restrained the accumulation of ammonium content under high temperature stress”
e6“These results indicate that exogenous MT could enhance the nitrogen metabolism of cucumber,reduce the damage of high temperature to the plants,and improve the resistance of cucumber seedlings against high temperature stress”
Claim · model-written summary
Exogenous melatonin increased the nitrate content of cucumber under high temperature stress.
- Taxon
- cucumberCucumis sativuse6
- Treatment
- exogenous MTe5
- Outcome
- nitrate contente5
- Direction
- increasede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“The exogenous MT could significantly increase the activities of NR,GS,GOGAT and GDH,increased the nitrate content and restrained the accumulation of ammonium content under high temperature stress”
e6“These results indicate that exogenous MT could enhance the nitrogen metabolism of cucumber,reduce the damage of high temperature to the plants,and improve the resistance of cucumber seedlings against high temperature stress”
Claim · model-written summary
Exogenous melatonin restrained the accumulation of ammonium content in cucumber under high temperature stress.
- Taxon
- cucumberCucumis sativuse6
- Treatment
- exogenous MTe5
- Outcome
- accumulation of ammonium contente5
- Direction
- restrainede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“The exogenous MT could significantly increase the activities of NR,GS,GOGAT and GDH,increased the nitrate content and restrained the accumulation of ammonium content under high temperature stress”
e6“These results indicate that exogenous MT could enhance the nitrogen metabolism of cucumber,reduce the damage of high temperature to the plants,and improve the resistance of cucumber seedlings against high temperature stress”
Claim · model-written summary
Exogenous melatonin was expected to reduce the damage of high temperature to cucumber plants.
- Taxon
- cucumberCucumis sativuse6
- Treatment
- exogenous MTe6
- Outcome
- damage of high temperature to the plantse6
- Direction
- reducee6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“These results indicate that exogenous MT could enhance the nitrogen metabolism of cucumber,reduce the damage of high temperature to the plants,and improve the resistance of cucumber seedlings against high temperature stress”
Claim · model-written summary
Exogenous melatonin was expected to improve the resistance of cucumber seedlings against high temperature stress.
- Taxon
- cucumberCucumis sativuse6
- Treatment
- exogenous MTe6
- Outcome
- resistance of cucumber seedlings against high temperature stresse6
- Direction
- improvee6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“These results indicate that exogenous MT could enhance the nitrogen metabolism of cucumber,reduce the damage of high temperature to the plants,and improve the resistance of cucumber seedlings against high temperature stress”
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