NAC transcription factor TgNAP promotes tulip petal senescence.
Journal
Plant physiology
ISSN: 1532-2548
Titre abrégé: Plant Physiol
Pays: United States
ID NLM: 0401224
Informations de publication
Date de publication:
27 10 2022
27 10 2022
Historique:
received:
11
03
2022
accepted:
29
06
2022
pubmed:
29
7
2022
medline:
1
11
2022
entrez:
28
7
2022
Statut:
ppublish
Résumé
Petal senescence is a crucial determinant for ornamental quality and economic value of floral crops. Salicylic acid (SA) and reactive oxygen species (ROS) are two prominent factors involved in plant senescence regulation. In this study, tulip TgNAP (NAC-like, activated by APETALA3/PISTILLATA) was characterized as positively regulating tulip petal senescence through dually regulating SA biosynthesis and ROS detoxification pathways. TgNAP was upregulated in senescing petals of tulip while exogenous SA and H2O2 treatments substantially promoted petal senescence in tulip. Silencing of TgNAP by VIGS assay delayed SA and H2O2-induced petal senescence in tulip, whereas overexpression of TgNAP promoted the senescence process in Arabidopsis (Arabidopsis thaliana) plants. Additionally, inhibition of SA biosynthesis prolonged the lifespan of TgNAP-silenced petal discs. Further evidence indicated that TgNAP activates the transcriptions of two key SA biosynthetic genes ISOCHORISMATE SYNTHASE 1 (TgICS1) and PHENYLALANINE AMMONIA-LYASE 1 (TgPAL1) through directly binding to their promoter regions. Meanwhile, TgNAP repressed ROS scavenging by directly inhibiting PEROXIDASE 12 (POD12) and POD17 expression. Taken together, these results indicate that TgNAP enhances SA biosynthesis and ROS accumulation to positively regulate petal senescence in tulip.
Identifiants
pubmed: 35900170
pii: 6651080
doi: 10.1093/plphys/kiac351
pmc: PMC9614467
doi:
Substances chimiques
Transcription Factors
0
Reactive Oxygen Species
0
Hydrogen Peroxide
BBX060AN9V
Salicylic Acid
O414PZ4LPZ
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
1960-1977Informations de copyright
© American Society of Plant Biologists 2022. All rights reserved. For permissions, please email: journals.permissions@oup.com.
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