Abstract
Phytolacca acinosa Roxb., a perennial herb native to East Asia, is increasingly naturalizing in Europe, yet its reproductive ecology in the secondary range remains poorly understood. This study evaluated seed productivity across central and edge populations in the secondary range, fruit and seed morphometrics, and germination responses to cold storage, acid scarification (simulating bird endozoochory), and light exposure. Fruit production per raceme was influenced by an interaction between insolation and range position: reduced insolation increased fruit set in central populations but decreased it at the range edge. Raceme number per shoot was lower in spontaneous plants compared to cultivated ones. Fresh seeds exhibited strong dormancy with no germination without scarification. Acid scarification significantly enhanced germination, particularly with light exposure, reaching up to 55%. Cold storage did not increase germination percentage but accelerated germination of scarified seeds under light, reducing median germination time from 24 to 21 days. Compared to the congeneric P. americana, P. acinosa shows more stringent dormancy requirements. We conclude that P. acinosa retains deep seed dormancy in its secondary range and relies on bird-mediated endozoochory for both dispersal and dormancy release. At the northern range edge, reduced plant vigor and lower raceme numbers are partially offset by increased flower production per raceme, though fruit set remains constrained. The species does not exhibit the simplified germination requirements often associated with successful invaders; instead, its invasion success appears driven by a bet-hedging strategy combining persistent seed banks with specific dormancy-breaking cues.
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Claims 16
Claim · model-written summary
Reduced insolation increased fruit set in central populations of Phytolacca acinosa.
- Taxon
- Phytolacca acinosa
Phytolacca acinosae0 - Material
- central populationse1
- Treatment
- reduced insolatione1
- Outcome
- fruit sete1
- Direction
- increasede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phytolacca acinosa Roxb.”
e1“reduced insolation increased fruit set in central populations but decreased it at the range edge”
Claim · model-written summary
Reduced insolation decreased fruit set at the range edge of Phytolacca acinosa.
- Taxon
- Phytolacca acinosaPhytolacca acinosae0
- Treatment
- reduced insolatione1
- Outcome
- fruit sete1
- Direction
- decreasede1
- Setting
- range edgee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phytolacca acinosa Roxb.”
e1“reduced insolation increased fruit set in central populations but decreased it at the range edge”
Claim · model-written summary
Raceme number per shoot was lower in spontaneous plants than in cultivated ones.
- Taxon
- Phytolacca acinosaPhytolacca acinosae0
- Material
- spontaneous plantse1
- Outcome
- Raceme number per shoote1
- Direction
- lowere1
- Comparator
- cultivated onese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phytolacca acinosa Roxb.”
e1“Raceme number per shoot was lower in spontaneous plants compared to cultivated ones”
Claim · model-written summary
Fresh seeds of Phytolacca acinosa show strong dormancy and do not germinate without scarification.
- Taxon
- Phytolacca acinosaPhytolacca acinosae0
- Organ / stage
- Fresh seedse1
- Outcome
- strong dormancye1
- Qualifier
- no germination without scarificatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phytolacca acinosa Roxb.”
e1“Fresh seeds exhibited strong dormancy with no germination without scarification”
Claim · model-written summary
Acid scarification significantly enhanced germination of Phytolacca acinosa seeds, reaching up to 55%, particularly with light exposure.
- Taxon
- Phytolacca acinosaPhytolacca acinosae0
- Treatment
- Acid scarificatione1
- Outcome
- germinatione1
- Direction
- enhancede1
- Value
- up to 55%e1
- Qualifier
- particularly with light exposuree1
- Comparator
- without scarificatione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phytolacca acinosa Roxb.”
e1“Acid scarification significantly enhanced germination, particularly with light exposure, reaching up to 55%”
e2“no germination without scarification”
Claim · model-written summary
Cold storage did not increase germination percentage of Phytolacca acinosa seeds.
- Taxon
- Phytolacca acinosaPhytolacca acinosae0
- Treatment
- Cold storagee1
- Outcome
- germination percentagee1
- Direction
- did not increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phytolacca acinosa Roxb.”
e1“Cold storage did not increase germination percentage but accelerated germination of scarified seeds under light, reducing median germination time from 24 to 21 days”
Claim · model-written summary
Cold storage reduced median germination time of scarified Phytolacca acinosa seeds under light, from 24 to 21 days.
- Taxon
- Phytolacca acinosaPhytolacca acinosae0
- Organ / stage
- scarified seedse1
- Treatment
- Cold storagee1
- Outcome
- median germination timee1
- Direction
- reducinge1
- Value
- from 24 to 21 dayse1
- Qualifier
- under lighte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phytolacca acinosa Roxb.”
e1“Cold storage did not increase germination percentage but accelerated germination of scarified seeds under light, reducing median germination time from 24 to 21 days”
Claim · model-written summary
Phytolacca acinosa shows more stringent dormancy requirements than the congeneric P. americana.
- Taxon
- P. acinosaPhytolacca acinosae0
- Outcome
- dormancy requirementse0
- Direction
- more stringente0
- Comparator
- P. americanae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to the congeneric P. americana, P. acinosa shows more stringent dormancy requirements”
Claim · model-written summary
Phytolacca acinosa retains deep seed dormancy in its secondary range.
- Taxon
- P. acinosaPhytolacca acinosae0
- Outcome
- deep seed dormancye0
- Setting
- secondary rangee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We conclude that P. acinosa retains deep seed dormancy in its secondary range and relies on bird-mediated endozoochory for both dispersal and dormancy release”
Claim · model-written summary
Phytolacca acinosa relies on bird-mediated endozoochory for seed dispersal and dormancy release.
- Taxon
- P. acinosaPhytolacca acinosae0
- Interactor
- birde0other
- Outcome
- dispersal and dormancy releasee0
- Qualifier
- bird-mediated endozoochorye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We conclude that P. acinosa retains deep seed dormancy in its secondary range and relies on bird-mediated endozoochory for both dispersal and dormancy release”
Claim · model-written summary
At the northern range edge, Phytolacca acinosa plant vigor is reduced.
- Taxon
- Phytolacca acinosaPhytolacca acinosae0
- Outcome
- plant vigore1
- Direction
- reducede1
- Setting
- northern range edgee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phytolacca acinosa Roxb.”
e1“At the northern range edge, reduced plant vigor and lower raceme numbers are partially offset by increased flower production per raceme, though fruit set remains constrained”
Claim · model-written summary
At the northern range edge, raceme numbers of Phytolacca acinosa are lower.
- Taxon
- Phytolacca acinosaPhytolacca acinosae0
- Outcome
- raceme numberse1
- Direction
- lowere1
- Setting
- northern range edgee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phytolacca acinosa Roxb.”
e1“At the northern range edge, reduced plant vigor and lower raceme numbers are partially offset by increased flower production per raceme, though fruit set remains constrained”
Claim · model-written summary
At the northern range edge, flower production per raceme of Phytolacca acinosa is increased, partially offsetting lower raceme numbers.
- Taxon
- Phytolacca acinosaPhytolacca acinosae0
- Outcome
- flower production per racemee1
- Direction
- increasede1
- Qualifier
- partially offsete1
- Setting
- northern range edgee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phytolacca acinosa Roxb.”
e1“At the northern range edge, reduced plant vigor and lower raceme numbers are partially offset by increased flower production per raceme, though fruit set remains constrained”
Claim · model-written summary
Fruit set of Phytolacca acinosa remains constrained at the northern range edge.
- Taxon
- Phytolacca acinosaPhytolacca acinosae0
- Outcome
- fruit sete1
- Qualifier
- remains constrainede1
- Setting
- northern range edgee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phytolacca acinosa Roxb.”
e1“At the northern range edge, reduced plant vigor and lower raceme numbers are partially offset by increased flower production per raceme, though fruit set remains constrained”
Claim · model-written summary
Phytolacca acinosa does not show the simplified germination requirements often associated with successful invaders.
- Taxon
- Phytolacca acinosaPhytolacca acinosae0
- Outcome
- germination requirementse1
- Qualifier
- does not exhibit the simplified germination requirements often associated with successful invaderse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phytolacca acinosa Roxb.”
e1“The species does not exhibit the simplified germination requirements often associated with successful invaders”
Claim · model-written summary
Invasion success of Phytolacca acinosa appears driven by a bet-hedging strategy of persistent seed banks and specific dormancy-breaking cues.
- Taxon
- Phytolacca acinosaPhytolacca acinosae0
- Outcome
- invasion successe1
- Qualifier
- bet-hedging strategy combining persistent seed banks with specific dormancy-breaking cuese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phytolacca acinosa Roxb.”
e1“its invasion success appears driven by a bet-hedging strategy combining persistent seed banks with specific dormancy-breaking cues”