Abstract
We investigated the physiological and growth responses of Jatropha curcas (L.) seedlings to simulated herbivory stress at different levels of drought stress in experimental greenhouse conditions. Simulated herbivory stress had an effect on photosystem II (PSII) yield of seedlings. The highest decrease of mean PSII yield (63 %) was recorded in seedlings grown under severe drought stress (200 mm yr−1) whereas a moderate herbivory stress (25 %) showed positive effects on mean PSII yield of the seedlings grown under well-watered conditions (1,900 mm yr−1). Stem water content, stem dry biomass and root–shoot ratio (with or without leaves) were significantly affected by the interaction effect of the simulated herbivory and drought stress. Simulated herbivory stress had effects on both root biomass and autumnal height growth rate. The highest above- and below-ground biomasses were obtained in the undamaged and well-watered (1,900 mm yr− 1) seedlings, whereas the lowest above- and below-ground biomass were obtained in seedlings exposed to 25 % herbivory stress and grown in extreme drought stress (200 mm yr− 1). Our results showed that J. curcas seedlings exhibited under-compensatory growth responses to simulated herbivory stress in all drought stress levels.
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Claims 8
Claim · model-written summary
Simulated herbivory affected seedling PSII yield.
- Taxon
- Jatropha curcas (L.)
_tree_at_Samedha.jpg?width=60)
Jatropha curcast0 - Treatment
- Simulated herbivory stresse0
- Outcome
- Simulated herbivory stress had an effect on photosystem II (PSII) yield of seedlings.e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_tree_at_Samedha.jpg?width=500)
Verbatim
e0“Simulated herbivory stress had an effect on photosystem II (PSII) yield of seedlings.”
t0“Jatropha curcas (L.)”
Claim · model-written summary
Under severe drought, mean PSII yield decreased by as much as 63%.
- Taxon
- Jatropha curcas (L.)Jatropha curcast0
- Treatment
- severe drought stress (200 mm yr−1)e0
- Outcome
- The highest decrease of mean PSII yield (63 %) was recorded in seedlings grown under severe drought stress (200 mm yr−1)e0
- Direction
- decreasee0
- Value
- 63 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest decrease of mean PSII yield (63 %) was recorded in seedlings grown under severe drought stress (200 mm yr−1)”
t0“Jatropha curcas (L.)”
Claim · model-written summary
Moderate simulated herbivory improved mean PSII yield under well watered conditions.
- Taxon
- Jatropha curcas (L.)Jatropha curcast0
- Treatment
- moderate herbivory stress (25 %)e0
- Outcome
- a moderate herbivory stress (25 %) showed positive effects on mean PSII yield of the seedlings grown under well-watered conditions (1,900 mm yr−1).e0
- Qualifier
- well-watered conditions (1,900 mm yr−1)e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a moderate herbivory stress (25 %) showed positive effects on mean PSII yield of the seedlings grown under well-watered conditions (1,900 mm yr−1).”
t0“Jatropha curcas (L.)”
Claim · model-written summary
The herbivory by drought interaction significantly affected stem water content, stem dry biomass and root shoot ratio.
- Taxon
- Jatropha curcas (L.)Jatropha curcast0
- Treatment
- simulated herbivory and drought stresse0
- Outcome
- Stem water content, stem dry biomass and root–shoot ratio (with or without leaves) were significantly affected by the interaction effect of the simulated herbivory and drought stress.e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stem water content, stem dry biomass and root–shoot ratio (with or without leaves) were significantly affected by the interaction effect of the simulated herbivory and drought stress.”
t0“Jatropha curcas (L.)”
Claim · model-written summary
Simulated herbivory affected root biomass and autumn height growth rate.
- Taxon
- Jatropha curcas (L.)Jatropha curcast0
- Treatment
- Simulated herbivory stresse0
- Outcome
- Simulated herbivory stress had effects on both root biomass and autumnal height growth rate.e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Simulated herbivory stress had effects on both root biomass and autumnal height growth rate.”
t0“Jatropha curcas (L.)”
Claim · model-written summary
Undamaged, well watered seedlings had the highest above and below ground biomass.
- Taxon
- Jatropha curcas (L.)Jatropha curcast0
- Treatment
- undamaged and well-watered (1,900 mm yr− 1)e0
- Outcome
- The highest above- and below-ground biomasses were obtained in the undamaged and well-watered (1,900 mm yr− 1) seedlingse0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest above- and below-ground biomasses were obtained in the undamaged and well-watered (1,900 mm yr− 1) seedlings”
t0“Jatropha curcas (L.)”
Claim · model-written summary
Seedlings at 25% herbivory and extreme drought had the lowest above and below ground biomass.
- Taxon
- Jatropha curcas (L.)Jatropha curcast0
- Treatment
- 25 % herbivory stresse0
- Outcome
- the lowest above- and below-ground biomass were obtained in seedlings exposed to 25 % herbivory stress and grown in extreme drought stress (200 mm yr− 1).e0
- Direction
- loweste0
- Qualifier
- extreme drought stress (200 mm yr− 1)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the lowest above- and below-ground biomass were obtained in seedlings exposed to 25 % herbivory stress and grown in extreme drought stress (200 mm yr− 1).”
t0“Jatropha curcas (L.)”
Claim · model-written summary
Jatropha seedlings exhibited under compensatory growth after simulated herbivory across all drought levels.
- Taxon
- Jatropha curcas (L.)Jatropha curcast0
- Treatment
- simulated herbivory stresse0
- Outcome
- J. curcas seedlings exhibited under-compensatory growth responses to simulated herbivory stress in all drought stress levels.e0
- Qualifier
- all drought stress levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“J. curcas seedlings exhibited under-compensatory growth responses to simulated herbivory stress in all drought stress levels.”
t0“Jatropha curcas (L.)”
The same questions in other papers
drought · physiology: photosynthesis · Jatropha curcasPositive and negative results
5 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
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3 papers more in this group
See all 7 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.