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Literature summary for 1.11.1.11 extracted from

  • Li, Y.; Hai, R.; Du, X.; Jiang, X.; Lu, H.
    Over-expression of a Populus peroxisomal ascorbate peroxidase (PpAPX) gene in tobacco plants enhances stress tolerance (2009), Plant Breed., 128, 404-410.
    View publication on PubMed

Application

Application Comment Organism
agriculture the transgenic plants show enhanced tolerance to oxidative stress, salt and drought, PpAPX does not play a significant role under normal growing conditions, but do ameliorate oxidative injury under abiotic stress, the Ad29 promoter shoul be used as an inducible promoter in transgenic works Populus tomentosa

Cloned(Commentary)

Cloned (Comment) Organism
into the pBI121 binary vector for a Agrobacterium tumefaciens-mediated tobacco leaf disc transformation, a CaMV 35S promoter and a rd29A promoter driven construct is used Populus tomentosa

Localization

Localization Comment Organism GeneOntology No. Textmining
peroxisome
-
Populus tomentosa 5777
-

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
L-ascorbate + H2O2 Populus tomentosa
-
dehydroascorbate + H2O
-
?

Organism

Organism UniProt Comment Textmining
Populus tomentosa Q5S1V5
-
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
L-ascorbate + H2O2
-
Populus tomentosa dehydroascorbate + H2O
-
?

Synonyms

Synonyms Comment Organism
peroxisomal ascorbate peroxidase
-
Populus tomentosa
PpAPX
-
Populus tomentosa

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
7.8
-
activity assay Populus tomentosa

Expression

Organism Comment Expression
Populus tomentosa APX activity in the 35S-PpAPX transgenic lines increases by 50% compared to the activity in the control lines, activity is 80% higher in the leaves in response to drought or salt stresses, the PpAPX transcript level is very low under normal growing conditions in rd29Ap-PpAPX plants, but clearly increased under drought stress up