Abstract
Leaf senescence is a critical physiological process during the growth and development of Moso bamboo ( Phyllostachys edulis ), yet the underlying molecular regulatory network remains unclear. In this study, we found that PheNAC6 expression was gradually and continuously upregulated during leaf development in Moso bamboo seedlings, with peak expression at the senescence stage. Heterologous expression of PheNAC6 in Arabidopsis thaliana and Oryza sativa demonstrated that PheNAC6 positively regulates leaf senescence. Further analyses revealed that PheNAC6 is involved in the abscisic acid (ABA)-mediated leaf senescence pathway: exogenous ABA treatment induced more pronounced senescence in PheNAC6 -overexpressing (OE) lines than in wild-type (WT) plants, and exogenous ABA also upregulated the transcription of PheNAC6 . Additionally, PheNAC6 directly activated the expression of PheABCG40–1 (encoding an ABA transporter) and the senescence-associated gene (SAG) PheSAG12 , indicating that PheNAC6 participates in ABA-mediated leaf senescence through the PheNAC6- PheABCG40–1 regulatory module. Thus, we propose a pivotal regulatory module whereby PheNAC6 promotes ABA-related leaf senescence by activating PheABCG40–1 . Our findings uncover a key molecular mechanism governing Moso bamboo leaf senescence and provide a theoretical foundation for modulating vegetative growth and breeding senescence-resistant varieties through ABA signaling. • PheNAC6 promotes leaf senescence in Moso bamboo as a positive regulator. • The PheNAC6- PheABCG40–1 module mediates ABA transport-linked leaf senescence in Moso bamboo. • Identification of the ABA- PheNAC6 positive feedback loop and PheNAC6 as a target for senescence-resistant crop breeding.
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Claims 8
Claim · model-written summary
PheNAC6 expression rose during Moso bamboo leaf development and peaked at senescence.
- Taxon
- Moso bamboo
Phyllostachys edulise0 - Organ / stage
- leafe0
- Gene
- PheNAC6e0
- Outcome
- PheNAC6 expressione0
- Direction
- upregulatede0
- Qualifier
- peak expression at the senescence stagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PheNAC6 expression was gradually and continuously upregulated during leaf development in Moso bamboo seedlings, with peak expression at the senescence stage”
Claim · model-written summary
Heterologous PheNAC6 expression promoted leaf senescence in Arabidopsis thaliana.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianae0 - Treatment
- Heterologous expression of PheNAC6e0
- Gene
- PheNAC6e0
- Outcome
- leaf senescencee0
- Direction
- positively regulatese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Heterologous expression of PheNAC6 in Arabidopsis thaliana and Oryza sativa demonstrated that PheNAC6 positively regulates leaf senescence”
Claim · model-written summary
Heterologous PheNAC6 expression promoted leaf senescence in Oryza sativa.
- Taxon
- Oryza sativa
Oryza sativae0 - Treatment
- Heterologous expression of PheNAC6e0
- Gene
- PheNAC6e0
- Outcome
- leaf senescencee0
- Direction
- positively regulatese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Heterologous expression of PheNAC6 in Arabidopsis thaliana and Oryza sativa demonstrated that PheNAC6 positively regulates leaf senescence”
Claim · model-written summary
ABA induced more pronounced senescence in PheNAC6-overexpressing lines than wild type.
- Taxon
- Moso bambooPhyllostachys edulist0
- Material
- PheNAC6 -overexpressing (OE) linese0
- Treatment
- exogenous ABA treatmente0
- Gene
- PheNAC6e0
- Outcome
- senescencee0
- Direction
- more pronouncede0
- Comparator
- wild-type (WT) plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous ABA treatment induced more pronounced senescence in PheNAC6 -overexpressing (OE) lines than in wild-type (WT) plants”
t0“Moso Bamboo”
Claim · model-written summary
Exogenous ABA upregulated PheNAC6 transcription.
- Taxon
- Moso BambooPhyllostachys edulist0
- Treatment
- exogenous ABAe0
- Gene
- PheNAC6e0
- Outcome
- transcription of PheNAC6e0
- Direction
- upregulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous ABA also upregulated the transcription of PheNAC6”
t0“Moso Bamboo”
Claim · model-written summary
PheNAC6 directly activated PheABCG40–1 expression.
- Taxon
- Moso BambooPhyllostachys edulist0
- Gene
- PheNAC6e0
- Outcome
- expression of PheABCG40–1e0
- Direction
- activatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PheNAC6 directly activated the expression of PheABCG40–1 (encoding an ABA transporter)”
t0“Moso Bamboo”
Claim · model-written summary
PheNAC6 directly activated PheSAG12 expression.
- Taxon
- Moso BambooPhyllostachys edulist0
- Gene
- PheNAC6e0
- Outcome
- senescence-associated gene (SAG) PheSAG12e0
- Direction
- activatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PheNAC6 directly activated the expression of PheABCG40–1 (encoding an ABA transporter) and the senescence-associated gene (SAG) PheSAG12”
t0“Moso Bamboo”
Claim · model-written summary
The authors propose that PheNAC6 promotes ABA-related senescence through PheABCG40–1 activation.
- Taxon
- Moso BambooPhyllostachys edulist0
- Gene
- PheNAC6e0
- Outcome
- ABA-related leaf senescencee0
- Direction
- promotese0
- Qualifier
- by activating PheABCG40–1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we propose a pivotal regulatory module whereby PheNAC6 promotes ABA-related leaf senescence by activating PheABCG40–1”
t0“Moso Bamboo”
The same questions in other papers
overexpression · quality: postharvest · Arabidopsis thaliana (thale cress)Positive and negative results
2 in the opposite direction
- negative
- negative
overexpression · quality: postharvest · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- positive
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.