Abstract
Abstract Milk thistle ( Silybum marianum L.) is highly valued for its medicinal properties. It is renowned for its capacity to flourish in dry environments, making it an attractive option for farming in areas with scarce water resources. This study aimed to assess how drought stress, foliar potassium sulfate application, and their interaction affect different milk thistle genotypes. Ten different genotypes (nine Iranian and one Hungarian) were assessed under three levels of soil water availability including control, moderate, and severe water stress, with depletion rates of 40%, 60%, and 80% of available water, respectively. Also, two foliar treatments were applied (non‐spray and K 2 SO 4 spray). Foliar K 2 SO 4 application was applied twice, 7 days apart, during the flower bud development stage, using a 2% concentration in both 2020 and 2021. Drought stress adversely affected physiological parameters such as relative leaf water content and photosynthetic efficiency but enhanced antioxidant enzyme activities and osmotic adjustment mechanisms. K 2 SO 4 foliar application exhibited dual effects, increasing yield while reducing key bioactive compounds including phenol and flavonoids content of seeds. Genotype‐specific responses highlighted varying degrees of tolerance to drought stress and potassium application. Sari exhibited sensitivity to drought, while Isfahan and Hungary genotypes showed tolerance to moderate water stress with potassium foliar spray. Principal component analysis revealed the relationship of traits and genotypes by traits in each moisture condition. The study underscores the complexity of drought response mechanisms and the need for tailored management strategies and genotype selection to ensure resilience and optimize yield in milk thistle cultivation.
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Claims 9
Claim · model-written summary
Drought reduced relative leaf water content and photosynthetic efficiency.
- Taxon
- Milk thistle
Silybum marianumt0 - Treatment
- Drought stresse0
- Outcome
- relative leaf water content and photosynthetic efficiencye0
- Direction
- adversely affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress adversely affected physiological parameters such as relative leaf water content and photosynthetic efficiency but enhanced antioxidant enzyme activities and osmotic adjustment mechanisms”
t0“Milk thistle”
Claim · model-written summary
Drought increased antioxidant enzyme activities and osmotic adjustment.
- Taxon
- Milk thistleSilybum marianumt0
- Treatment
- Drought stresse0
- Outcome
- antioxidant enzyme activities and osmotic adjustment mechanismse0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress adversely affected physiological parameters such as relative leaf water content and photosynthetic efficiency but enhanced antioxidant enzyme activities and osmotic adjustment mechanisms”
t0“Milk thistle”
Claim · model-written summary
Foliar potassium sulfate increased milk thistle yield.
- Taxon
- Milk thistleSilybum marianumt0
- Treatment
- K 2 SO 4 foliar applicatione0
- Outcome
- yielde0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K 2 SO 4 foliar application exhibited dual effects, increasing yield while reducing key bioactive compounds including phenol and flavonoids content of seeds”
t0“Milk thistle”
Claim · model-written summary
Foliar potassium sulfate reduced seed phenol and flavonoid content.
- Taxon
- Milk thistleSilybum marianumt0
- Organ / stage
- seedse0
- Treatment
- K 2 SO 4 foliar applicatione0
- Outcome
- phenol and flavonoids content of seedse0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K 2 SO 4 foliar application exhibited dual effects, increasing yield while reducing key bioactive compounds including phenol and flavonoids content of seeds”
t0“Milk thistle”
Claim · model-written summary
Milk thistle genotypes varied in tolerance to drought and potassium application.
- Taxon
- Milk thistleSilybum marianumt0
- Outcome
- tolerance to drought stress and potassium applicatione0
- Direction
- varying degreese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Genotype‐specific responses highlighted varying degrees of tolerance to drought stress and potassium application”
t0“Milk thistle”
Claim · model-written summary
Sari was drought sensitive.
- Taxon
- Milk thistleSilybum marianumt0
- Material
- Sarie0
- Outcome
- sensitivity to droughte0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sari exhibited sensitivity to drought, while Isfahan and Hungary genotypes showed tolerance to moderate water stress with potassium foliar spray”
t0“Milk thistle”
Claim · model-written summary
Isfahan tolerated moderate water stress with potassium spray.
- Taxon
- Milk thistleSilybum marianumt0
- Material
- Isfahane0
- Outcome
- tolerance to moderate water stresse0
- Qualifier
- with potassium foliar spraye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sari exhibited sensitivity to drought, while Isfahan and Hungary genotypes showed tolerance to moderate water stress with potassium foliar spray”
t0“Milk thistle”
Claim · model-written summary
Hungary tolerated moderate water stress with potassium spray.
- Taxon
- Milk thistleSilybum marianumt0
- Material
- Hungarye0
- Outcome
- tolerance to moderate water stresse0
- Qualifier
- with potassium foliar spraye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sari exhibited sensitivity to drought, while Isfahan and Hungary genotypes showed tolerance to moderate water stress with potassium foliar spray”
t0“Milk thistle”
Claim · model-written summary
Principal component analysis related traits and genotypes within each moisture condition.
- Taxon
- Milk thistleSilybum marianumt0
- Outcome
- relationship of traits and genotypes by traitse0
- Setting
- each moisture conditione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Principal component analysis revealed the relationship of traits and genotypes by traits in each moisture condition”
t0“Milk thistle”
The same questions in other papers
application · quality: phytochemicals · Silybum marianum (milk thistle)Positive and negative results
1 in the opposite direction
- positive
drought · physiology: photosynthesis · Silybum marianum (milk thistle)Results agree
1 paper in the same direction as this paper
- negative
application · yield · Silybum marianum (milk thistle)Results agree
3 papers in the same direction as this paper
- positive
- positive
- 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.