Abstract
Drought is one of the main limitations impacting the growth, yield, and phytochemical properties of medicinal plants. The present study examined how foliar application of nano-silicon (n-Si) can impact drought tolerance, physiological responses, and levels of bioactive compounds (bio-actives) in the medicinal herb, Lallemantia iberica. Plants were grown in a greenhouse under either well-watered (100% field capacity) or moderate drought stress (50% field capacity) conditions. Drought-stressed plants received a spraying of n-Si (at a concentration of 100 mg L− 1) or bulk silicon at a similar concentration, every three days. Compared to control (well-watered) plants, biomass accumulation and photosynthetic efficiency were significantly decreased, along with seed yield and essential oil yields in drought-stressed plants. Application of nano-silicon in drought conditions improved plant water condition, chlorophyll levels, antioxidant enzyme activity, and yield-related traits compared with untreated drought-stressed plants. On the contrary, the responses produced by bulk silicon were much weaker and inconsistent. The improvement in the beneficial effects of nano-silicon resulted from better regulation of water-use efficiency, oxidative stress, and the number of secondary metabolites produced, demonstrating that there were physiological changes instead of isolated responses by individual traits. Results indicate that the beneficial effects of n-Si can lessen the impact of drought stress through the enhancement of physiological stability and the production of phytochemicals from L. iberica in a controlled environment.
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Claims 7
Claim · model-written summary
Drought decreased biomass accumulation and photosynthetic efficiency relative to well-watered plants.
- Taxon
- Lallemantia iberica
Dracocephalum ibericumt0 - Treatment
- drought-stressede0
- Outcome
- biomass accumulation and photosynthetic efficiencye0
- Direction
- decreasede0
- Comparator
- control (well-watered) plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to control (well-watered) plants, biomass accumulation and photosynthetic efficiency were significantly decreased, along with seed yield and essential oil yields in drought-stressed plants”
t0“Lallemantia iberica”
Claim · model-written summary
Drought decreased seed yield and essential oil yields relative to well-watered plants.
- Taxon
- Lallemantia ibericaDracocephalum ibericumt0
- Treatment
- drought-stressede0
- Outcome
- seed yield and essential oil yieldse0
- Direction
- decreasede0
- Comparator
- control (well-watered) plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to control (well-watered) plants, biomass accumulation and photosynthetic efficiency were significantly decreased, along with seed yield and essential oil yields in drought-stressed plants”
t0“Lallemantia iberica”
Claim · model-written summary
Nano-silicon improved plant water condition and chlorophyll levels versus untreated drought-stressed plants.
- Taxon
- Lallemantia ibericaDracocephalum ibericumt0
- Treatment
- Application of nano-silicon in drought conditionse0
- Outcome
- plant water condition, chlorophyll levelse0
- Direction
- improvede0
- Comparator
- untreated drought-stressed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of nano-silicon in drought conditions improved plant water condition, chlorophyll levels, antioxidant enzyme activity, and yield-related traits compared with untreated drought-stressed plants”
t0“Lallemantia iberica”
Claim · model-written summary
Nano-silicon improved antioxidant enzyme activity versus untreated drought-stressed plants.
- Taxon
- Lallemantia ibericaDracocephalum ibericumt0
- Treatment
- Application of nano-silicon in drought conditionse0
- Outcome
- antioxidant enzyme activitye0
- Direction
- improvede0
- Comparator
- untreated drought-stressed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of nano-silicon in drought conditions improved plant water condition, chlorophyll levels, antioxidant enzyme activity, and yield-related traits compared with untreated drought-stressed plants”
t0“Lallemantia iberica”
Claim · model-written summary
Nano-silicon improved yield-related traits versus untreated drought-stressed plants.
- Taxon
- Lallemantia ibericaDracocephalum ibericumt0
- Treatment
- Application of nano-silicon in drought conditionse0
- Outcome
- yield-related traitse0
- Direction
- improvede0
- Comparator
- untreated drought-stressed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of nano-silicon in drought conditions improved plant water condition, chlorophyll levels, antioxidant enzyme activity, and yield-related traits compared with untreated drought-stressed plants”
t0“Lallemantia iberica”
Claim · model-written summary
Bulk silicon responses were weaker and inconsistent relative to nano-silicon.
- Taxon
- Lallemantia ibericaDracocephalum ibericumt0
- Treatment
- bulk silicone0
- Outcome
- responsese0
- Direction
- much weakere0
- Comparator
- nano-silicone1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the responses produced by bulk silicon were much weaker and inconsistent”
e1“Application of nano-silicon in drought conditions”
t0“Lallemantia iberica”
Claim · model-written summary
Authors attributed nano-silicon benefits to regulation of water-use efficiency, oxidative stress and secondary metabolite production.
- Taxon
- Lallemantia ibericaDracocephalum ibericumt0
- Treatment
- nano-silicone0
- Outcome
- beneficial effectse0
- Qualifier
- better regulation of water-use efficiency, oxidative stress, and the number of secondary metabolites producede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The improvement in the beneficial effects of nano-silicon resulted from better regulation of water-use efficiency, oxidative stress, and the number of secondary metabolites produced”
t0“Lallemantia iberica”
The same questions in other papers
drought · yield · Dracocephalum ibericumPositive and negative results
1 in the opposite direction
- no effect
nanoparticle · physiology: pigments · Dracocephalum ibericumResults agree
1 paper in the same direction as this paper
- positive
nanoparticle · yield · Dracocephalum ibericumResults agree
1 paper in the same direction as this paper
- positive
drought · soil: biology · Dracocephalum ibericumResults 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.