ArticlePlanta2011
The polyphenol oxidase gene family in poplar: phylogeny, differential expression and identification of a novel, vacuolar isoform.
Article in Planta, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.
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Who cites it
25 citing papers in PubMed, 57 citations in OpenAlex.
- Birth and death evolution of polyphenol oxidase (PPO) gene family in Oryza species.Botanical studies · 2026Article
- Investigation and characterization of the GhPPO gene family and its expression in response to fibre cell growth and biotic stress in Gossypium hirsutum L.BMC genomics · 2025Article
- Biochemical Analysis of Recombinant Pea Seed Coat-Specific Polyphenol Oxidase (Journal of agricultural and food chemistry · 2025Article
- Article
- Identification and Analysis ofPlants (Basel, Switzerland) · 2024Article
- Spatio-temporal expression of polyphenol oxidase unveils the dynamics of L-DOPA accumulation in faba bean (Physiology and molecular biology of plants : an international journal of functional plant biology · 2024Article
- The PPO family in Nicotiana tabacum is an important regulator to participate in pollination.BMC plant biology · 2024Article
- Tyrosinases: a family of copper-containing metalloenzymes.Chemtexts · 2024Article
- Metabolic Pathway Reconstruction Indicates the Presence of Important Medicinal Compounds inInternational journal of molecular sciences · 2023Article
- Article
- High-quality genome assembly and multi-omics analysis of pigment synthesis pathway inFrontiers in microbiology · 2023Article
- Genome-wide analysis of the polyphenol oxidase gene family reveals that MaPPO1 and MaPPO6 are the main contributors to fruit browning inFrontiers in plant science · 2023Article
- An Erwinia amylovora inducible promoter for improvement of apple fire blight resistance.Plant cell reports · 2022Article
- Phenoloxidases in Plants-How Structural Diversity Enables Functional Specificity.Frontiers in plant science · 2021Review
- An R1R2R3 MYB Transcription Factor, MnMYB3R1, Regulates the Polyphenol Oxidase Gene in Mulberry (International journal of molecular sciences · 2019Article
- Article
- Two New Polyphenol Oxidase Genes of Tea Plant (International journal of molecular sciences · 2018Article
- Article
- Characterization of the polyphenol oxidase gene family reveals a novel microRNA involved in posttranscriptional regulation of PPOs in Salvia miltiorrhiza.Scientific reports · 2017Article
- Origin and evolution of MIR1444 genes in Salicaceae.Scientific reports · 2017Article
Corrections and comments
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Polyphenol oxidases (PPOs) are oxidative enzymes that convert monophenols and o-diphenols to o-quinones using molecular oxygen. The quinone products are highly reactive following tissue damage and can interact with cellular constituents and cause oxidative browning and cross-linking. The induction of PPO in some plants as a result of wounding, herbivore attack, or pathogen infection has implicated them in defense. However, PPO-like enzymes that act as specific hydroxylases, for example in lignan and pigment biosynthesis, have also been discovered. Here, we present the first genome-enabled analysis of a PPO gene family. The Populus trichocarpa genome was found to contain a minimum of nine complete PPO genes, and seven of these were characterized further. The PPO gene family includes both recently duplicated and divergent sequences that are 36-98% identical at the amino acid level. Gene expression profiling in poplar tissues and organs revealed that the PPO genes are all differentially expressed during normal development, but that only a small subset of PPO genes are significantly upregulated by wounding, methyl jasmonate or pathogen infection. Our studies also identified PtrPPO13, a novel PPO gene that is predicted to encode an N-terminal signal peptide. Transient expression of green fluorescent protein fusions demonstrated its localization to the vacuolar lumen. Together, our findings show that the poplar PPO family is diverse and is likely linked to diverse physiological functions.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.