Abstract
Conifers are dominant tree species in boreal forests, but are susceptible to attack by bark beetles. Upon bark beetle attack, conifers release substantial quantities of volatile organic compounds known as herbivore-induced plant volatiles (HIPVs). Earlier studies of broadleaved plants have shown that HIPVs provide information to neighbouring plants, which may enhance their defences. However, the defence responses of HIPV-receiver plants have not been described for conifers. Here we advance knowledge of plant-plant communication in conifers by documenting a suite of receiver-plant responses to bark-feeding-induced volatiles. Scots pine seedlings exposed to HIPVs were more resistant to subsequent weevil feeding and received less damage. Receiver plants had both induced and primed volatile emissions and their resin ducts had an increased epithelial cell (EC) mean area and an increased number of cells located in the second EC layer. Importantly, HIPV exposure increased stomatal conductance and net photosynthesis rate of receiver plants. Receiver-plant responses were also examined under elevated ozone conditions and found to be significantly altered. However, the final defence outcome was not affected. These findings demonstrate that HIPVs modulate conifer metabolism through responses spanning photosynthesis and chemical defence. The responses are adjusted under ozone stress, but the defence benefits remain intact.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Volatile-exposed Scots pine seedlings resisted subsequent weevil feeding and received less damage.
- Taxon
- Scots pine
Pinus sylvestrise0 - Treatment
- exposed to HIPVse0
- Interactor
- weevile0herbivore
- Outcome
- weevil feeding and received less damagee0
- Direction
- lesse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Scots pine seedlings exposed to HIPVs were more resistant to subsequent weevil feeding and received less damage”
Claim · model-written summary
Receiver pine plants showed induced and primed volatile emissions.
- Taxon
- Scots pinePinus sylvestrist0
- Treatment
- HIPVse1
- Outcome
- induced and primed volatile emissionse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Receiver plants had both induced and primed volatile emissions”
t0“Scots pine”
e1“Scots pine seedlings exposed to HIPVs were more resistant to subsequent weevil feeding and received less damage”
Claim · model-written summary
Receiver pine resin ducts had greater epithelial cell area and more second-layer cells.
- Taxon
- Scots pinePinus sylvestrist0
- Organ / stage
- resin ductse0
- Treatment
- HIPVse1
- Outcome
- epithelial cell (EC) mean area and an increased number of cells located in the second EC layere0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“their resin ducts had an increased epithelial cell (EC) mean area and an increased number of cells located in the second EC layer”
t0“Scots pine”
e1“Scots pine seedlings exposed to HIPVs were more resistant to subsequent weevil feeding and received less damage”
Claim · model-written summary
HIPV exposure increased stomatal conductance and net photosynthesis in receiver pines.
- Taxon
- Scots pinePinus sylvestrist0
- Treatment
- HIPV exposuree0
- Outcome
- stomatal conductance and net photosynthesis ratee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“HIPV exposure increased stomatal conductance and net photosynthesis rate of receiver plants”
t0“Scots pine”
Claim · model-written summary
Elevated ozone significantly altered receiver-plant responses.
- Taxon
- Scots pinePinus sylvestrist0
- Treatment
- elevated ozone conditionse0
- Outcome
- Receiver-plant responsese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Receiver-plant responses were also examined under elevated ozone conditions and found to be significantly altered”
t0“Scots pine”
Claim · model-written summary
Elevated ozone did not affect the final defense outcome.
- Taxon
- Scots pinePinus sylvestrist0
- Treatment
- elevated ozonee1
- Outcome
- final defence outcomee0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, the final defence outcome was not affected”
t0“Scots pine”
e1“Receiver-plant responses were also examined under elevated ozone conditions and found to be significantly altered”
The same questions in other papers
ozone · disease · Pinus sylvestris (Scots pine)Results agree
4 papers in the same direction as this paper
- negative
- negative
- negative
1 paper more in this group
See all 5 papers →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.