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Literature summary for 1.11.1.11 extracted from

  • Guo, K.; Li, Z.; Tian, H.; Du, X.; Liu, Z.; Huang, H.; Wang, P.; Ye, Z.; Zhang, X.; Tu, L.
    Cytosolic ascorbate peroxidases plays a critical role in photosynthesis by modulating reactive oxygen species level in stomatal guard cell (2020), Front. Plant Sci., 11, 0000 .
    View publication on PubMedView publication on EuropePMC
Search for more literature for 1.11.1.11

Protein Variants

Protein Variants Comment Organism
additional information generation of transgenic cotton with changes of endogenous ROS by overexpressing or suppressing the expression of cytosolic ascorbate peroxidases (APXs). Downregulation of cytosolic ascorbate peroxidases inhibits the development of sink organs in Gossipium hirsutum. Plant growth and plant size, including plant heights and leaf sizes (lengths and widths), are seriously reduced in the cAPX-suppressed cottons compared to wild-type plants, phenotypes, detailed overview. Downregulated expression of cAPXs inhibits the development of cotton bolls, fibers, and seeds and reduces the storage capacity of the sink organs. The photosynthetic rate is suppressed in the mutant plants. Overexpression of GhAPX1 has little effect on the photosynthetic characteristics of the plants, except that the transpiration rate (Trmmol) and leaf surface temperature (CTleaf) are lower than in the control plant. The downregulation of cytosolic ascorbate peroxidases (APXs) decreases the water content and increases the water loss rate in cotton leaf Gossypium hirsutum

Localization

Localization Comment Organism GeneOntology No. Textmining
cytosol
-
 Gossypium hirsutum 5829
-

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
2 L-ascorbate + H2O2 + 2 H+ Gossypium hirsutum
-
 L-ascorbate + L-dehydroascorbate + 2 H2O
-
 ?

Organism

Organism UniProt Comment Textmining
Gossypium hirsutum
-
-
-

Source Tissue

Source Tissue Comment Organism Textmining
cotton fibre cotton bolls Gossypium hirsutum
-
guard cell
-
 Gossypium hirsutum
-
leaf
-
 Gossypium hirsutum
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
2 L-ascorbate + H2O2 + 2 H+
-
 Gossypium hirsutum L-ascorbate + L-dehydroascorbate + 2 H2O
-
 ?

Synonyms

Synonyms Comment Organism
ascorbate peroxidase
-
 Gossypium hirsutum
cAPX
-
 Gossypium hirsutum
cytosolic ascorbate peroxidase
-
 Gossypium hirsutum
GhAPX1
-
 Gossypium hirsutum

Cofactor

Cofactor Comment Organism Structure
heme
-
 Gossypium hirsutum

General Information

General Information Comment Organism
malfunction downregulation of cytosolic ascorbate peroxidases inhibits the development of sink organs in cotton. Downregulated expression of cAPXs inhibits the development of cotton bolls, fibers, and seeds and reduces the storage capacity of the sink organs. The photosynthetic rate is suppressed in the knockout mutant plants, and the reactive oxygen species level is increased in guard cells. Overexpression of GhAPX1 has little effect on the photosynthetic characteristics of the plants. The decrease of cAPX expression in leaves increases ROS level in stomatal guard cells, leading to the decrease of stomatal aperture, which might decrease the supply of carbon dioxide and water used for photosynthesis. The downregulation of cytosolic ascorbate peroxidases (APXs) decreases the water content and increases the water loss rate in cotton leaf. There is a close relationship between the stomatal opening and the inhibition of plant growth caused by the deficiency of antioxidant enzyme in cells Gossypium hirsutum
physiological function cytosolic ascorbate peroxidases (APXs) are hydrogen peroxide (H2O2) scavenging enzymes in plants. H2O2 is a signaling molecule involved in regulating photosynthesis in plants. Cytosolic ascorbate peroxidase members provide an important guarantee to maintain photosynthetic rate Gossypium hirsutum