Abstract
Sage is an important aromatic crop, extensively cultivated worldwide. Drought stress affects yield and composition of secondary metabolites such as fatty acids, essential oils, antioxidants (Bettaieb et al. 2009, Munné-Bosch et al. 2001), changing the essential oil composition profile with respect to the ISO 9909 standard. Drought tolerance may differ at the infraspecific level, so we compared the response of Salvia officinalis L. and S. officinalis L. var maxima grown under two different irrigation regimes to highlight differences in leaf growth, water potential and gas exchange. Potted plants were grown in the greenhouse at 100% or 50% of field water capacity for three months. Monthly measurements of 3rd node leaf length, width and area were taken using ImageJ software. Midday leaf water potential was measured using a pressure chamber (SKPM 1400, Skye Instruments) and leaf stomatal conductance, transpiration and net photosynthesis were measured using a portable infrared gas analyzer (HCM-1000, Walz). Drought stress reduced leaf area in both taxa, but the effect was less pronounced in S. officinalis (-67%) than in S. officinalis var. maxima (-76%) . Also leaf water potential was almost 2 bar lower in this variety than in S. officinalis under water deficit. In irrigated S. officinalis var. maxima plants transpiration and stomatal conductance rates were more than twice those of S. officinalis, while under water deficit the difference between the taxa was not significant. Interestingly, net photosynthesis in S. officinalis was about twice that measured in S. officinalis var. maxima, both in irrigated and in stressed plants. Furthermore, in S. officinalis water deficit resulted in only a slight reduction of photosynthetic rate, while in in S. officinalis var. maxima the reduction was around 50%. Both taxa are affected by drought stress, responding with a reduction in leaf expansion and in transpiration, in order to reduce water loss. However, S. officinalis appears to have a higher efficiency, maintaining higher levels of carbon assimilation.
Abstract from the paper’s OpenAlex record; open copy licensed other-oa. 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 10
Claim · model-written summary
Water deficit reduced leaf area in S. officinalis by 67%.
- Taxon
- S. officinalis
Salvia officinalise0 - Treatment
- Drought stresse0
- Outcome
- leaf areae0
- Direction
- reducede0
- Value
- -67%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress reduced leaf area in both taxa, but the effect was less pronounced in S. officinalis (-67%) than in S. officinalis var. maxima (-76%) .”
Claim · model-written summary
Water deficit reduced leaf area in S. officinalis var. maxima by 76%.
- Taxon
- S. officinalis var. maximaSalvia officinalise0
- Treatment
- Drought stresse0
- Outcome
- leaf areae0
- Direction
- reducede0
- Value
- -76%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress reduced leaf area in both taxa, but the effect was less pronounced in S. officinalis (-67%) than in S. officinalis var. maxima (-76%) .”
Claim · model-written summary
Under water deficit, leaf water potential in var. maxima was almost 2 bar lower.
- Taxon
- S. officinalis var. maximaSalvia officinalise1
- Treatment
- water deficite0
- Outcome
- leaf water potentiale0
- Direction
- lowere0
- Value
- almost 2 bare0
- Comparator
- S. officinalise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf water potential was almost 2 bar lower in this variety than in S. officinalis under water deficit.”
e1“S. officinalis var. maxima (-76%)”
Claim · model-written summary
Irrigated var. maxima had more than twice the transpiration of S. officinalis.
- Taxon
- S. officinalis var. maximaSalvia officinalise0
- Treatment
- irrigatede0
- Outcome
- transpiratione0
- Direction
- more than twicee0
- Comparator
- S. officinalise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In irrigated S. officinalis var. maxima plants transpiration and stomatal conductance rates were more than twice those of S. officinalis”
Claim · model-written summary
Irrigated var. maxima had more than twice the stomatal conductance of S. officinalis.
- Taxon
- S. officinalis var. maximaSalvia officinalise0
- Treatment
- irrigatede0
- Outcome
- stomatal conductance ratese0
- Direction
- more than twicee0
- Comparator
- S. officinalise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In irrigated S. officinalis var. maxima plants transpiration and stomatal conductance rates were more than twice those of S. officinalis”
Claim · model-written summary
Under water deficit, the taxa did not differ significantly in transpiration and stomatal conductance.
- Taxon
- S. officinalis var. maximaSalvia officinalise2
- Treatment
- water deficite0
- Outcome
- transpiration and stomatal conductance ratese1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under water deficit the difference between the taxa was not significant.”
e1“transpiration and stomatal conductance rates”
e2“In irrigated S. officinalis var. maxima plants”
Claim · model-written summary
Net photosynthesis in S. officinalis was about twice that in var. maxima under both irrigation regimes.
- Taxon
- S. officinalisSalvia officinalise0
- Outcome
- net photosynthesise0
- Direction
- about twicee0
- Qualifier
- both in irrigated and in stressed plantse0
- Comparator
- S. officinalis var. maximae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“net photosynthesis in S. officinalis was about twice that measured in S. officinalis var. maxima, both in irrigated and in stressed plants.”
Claim · model-written summary
Water deficit slightly reduced photosynthetic rate in S. officinalis.
- Taxon
- S. officinalisSalvia officinalise0
- Treatment
- water deficite0
- Outcome
- photosynthetic ratee0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in S. officinalis water deficit resulted in only a slight reduction of photosynthetic rate”
Claim · model-written summary
Water deficit reduced photosynthetic rate by around 50% in var. maxima.
- Taxon
- S. officinalis var. maximaSalvia officinalise0
- Outcome
- photosynthetic ratee1
- Direction
- reductione0
- Value
- around 50%e0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in S. officinalis var. maxima the reduction was around 50%.”
e1“photosynthetic rate”
Claim · model-written summary
Both sage taxa reduced transpiration under drought.
Not reportedTaxonComparator
Verbatim
e0“Both taxa are affected by drought stress, responding with a reduction in leaf expansion and in transpiration”
The same questions in other papers
drought · physiology: photosynthesis · Salvia officinalis (garden sage)Results agree
2 papers in the same direction as this paper
- no effect
- negative
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.