Abstract
The effects of foliar spray of putrescine (Put; 8 mM) on chlorophyll (Chl) metabolism and xanthophyll cycle in cucumber seedlings were investigated under saline conditions of 75 mM NaCl. Exogenous Put promoted the conversion of uroporhyrinogen III to protoporphyrin IX and alleviated decreases in Chl contents and in a size of the xanthophyll cycle pool under salt stress. Moreover, the Put treatment reduced the activities of uroporphyrinogen III synthase, chlorophyllase, and Mg-dechelatase and downregulated the transcriptional levels of glutamyl-tRNA reductase, 5-aminolevulinate dehydratase, uroporphyrinogen III synthase, uroporphyrinogen III decarboxylase, and chlorophyllide a oxygenase, but significantly increased the expression levels of non-yellow coloring 1-like, pheide a oxygenase, red chlorophyll catabolite reductase, and violaxanthin de-epoxidase. Taken together, these results suggest that Put might improve Chl metabolism and xanthophyll cycle by regulating enzyme activities and mRNA transcription levels in a way that improved the salt tolerance of cucumber plants.
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Claims 7
Claim · model-written summary
Putrescine promoted conversion of uroporhyrinogen III to protoporphyrin IX under salt stress.
- Taxon
- cucumber seedlings
Cucumis sativust0 - Treatment
- Pute0
- Outcome
- conversion of uroporhyrinogen III to protoporphyrin IXe0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous Put promoted the conversion of uroporhyrinogen III to protoporphyrin IX and alleviated decreases in Chl contents and in a size of the xanthophyll cycle pool under salt stress”
t0“cucumber seedlings”
Claim · model-written summary
Putrescine alleviated the decline in chlorophyll content under salt stress.
- Taxon
- cucumber seedlingsCucumis sativust0
- Treatment
- Pute0
- Outcome
- Chl contentse0
- Direction
- alleviated decreasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous Put promoted the conversion of uroporhyrinogen III to protoporphyrin IX and alleviated decreases in Chl contents and in a size of the xanthophyll cycle pool under salt stress”
t0“cucumber seedlings”
Claim · model-written summary
Putrescine alleviated the decline in xanthophyll cycle pool size under salt stress.
- Taxon
- cucumber seedlingsCucumis sativust0
- Treatment
- Pute0
- Outcome
- size of the xanthophyll cycle poole0
- Direction
- alleviated decreasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous Put promoted the conversion of uroporhyrinogen III to protoporphyrin IX and alleviated decreases in Chl contents and in a size of the xanthophyll cycle pool under salt stress”
t0“cucumber seedlings”
Claim · model-written summary
Putrescine reduced activities of three chlorophyll metabolism enzymes.
- Taxon
- cucumber seedlingsCucumis sativust0
- Treatment
- Pute0
- Gene
- uroporphyrinogen III synthase, chlorophyllase, and Mg-dechelatasee0
- Outcome
- activitiese0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Put treatment reduced the activities of uroporphyrinogen III synthase, chlorophyllase, and Mg-dechelatase”
t0“cucumber seedlings”
Claim · model-written summary
Putrescine downregulated five named transcript levels.
- Taxon
- cucumber seedlingsCucumis sativust0
- Treatment
- putrescinet1
- Gene
- glutamyl-tRNA reductase, 5-aminolevulinate dehydratase, uroporphyrinogen III synthase, uroporphyrinogen III decarboxylase, and chlorophyllide a oxygenasee0
- Outcome
- transcriptional levelse0
- Direction
- downregulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“downregulated the transcriptional levels of glutamyl-tRNA reductase, 5-aminolevulinate dehydratase, uroporphyrinogen III synthase, uroporphyrinogen III decarboxylase, and chlorophyllide a oxygenase”
t0“cucumber seedlings”
t1“putrescine”
Claim · model-written summary
Putrescine significantly increased expression of four named genes.
- Taxon
- cucumber seedlingsCucumis sativust0
- Treatment
- putrescinet1
- Gene
- non-yellow coloring 1-like, pheide a oxygenase, red chlorophyll catabolite reductase, and violaxanthin de-epoxidasee0
- Outcome
- expression levelse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significantly increased the expression levels of non-yellow coloring 1-like, pheide a oxygenase, red chlorophyll catabolite reductase, and violaxanthin de-epoxidase”
t0“cucumber seedlings”
t1“putrescine”
Claim · model-written summary
The authors suggest putrescine might improve salt tolerance by regulating enzyme activity and transcription.
- Taxon
- cucumber plantsCucumis sativuse0
- Treatment
- Pute0
- Outcome
- salt tolerancee0
- Qualifier
- regulating enzyme activities and mRNA transcription levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Put might improve Chl metabolism and xanthophyll cycle by regulating enzyme activities and mRNA transcription levels in a way that improved the salt tolerance of cucumber plants”
The same questions in other papers
putrescine · growth · Cucumis sativus (cucumber)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.