Abstract
Various environmental factors not only affect plant growth and physiological responses individually but also interact with each other. To examine the impact of light intensity on the drought responses of sweet basil, plants were subjected to maintenance of two substrate volumetric water contents (VWC) using a sensor-based automated irrigation system under two distinct light intensities. The VWC threshold was set to either a dry (0.2 m3·m−3) or sufficiently wet condition (0.6 m3·m−3) under low (170 μmol·m−2·s−1) or high light intensities (500 μmol·m−2·s−1). The growth and physiological responses of sweet basil (Ocimum basilicum L.) were observed over 21 days in the four treatment groups, where the combination of two environmental factors was analyzed. Under high light intensity, sweet basil showed lower Fv/Fm and quantum yield of PSII, compared to that under low light intensity, regardless of drought treatment. Fourteen days after drought treatment under high light intensity, stomatal conductance and the photosynthetic rate significantly reduced. Whereas plants under low light intensity showed similar stomatal conductance and photosynthetic rates regardless of drought treatment. Assessment of shoot and root dry weights revealed that plant growth decline caused by drought was more pronounced under high light intensity than under low light intensity. Thus, sweet basil showed significant declines in growth and physiological responses owing to drought only under high light intensity; no significant changes were observed under low light intensity.
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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 5
Claim · model-written summary
High light lowered basil Fv/Fm and PSII quantum yield regardless of drought.
- Taxon
- sweet basil
Ocimum basilicume0 - Treatment
- high light intensitye0
- Outcome
- Fv/Fm and quantum yield of PSIIe0
- Direction
- lowere0
- Qualifier
- regardless of drought treatmente0
- Comparator
- low light intensitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under high light intensity, sweet basil showed lower Fv/Fm and quantum yield of PSII, compared to that under low light intensity, regardless of drought treatment”
Claim · model-written summary
Drought under high light significantly reduced stomatal conductance after 14 days.
- Taxon
- sweet basilOcimum basilicumt0
- Treatment
- drought treatment under high light intensitye0
- Outcome
- stomatal conductancee0
- Direction
- reducede0
- Qualifier
- Fourteen dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fourteen days after drought treatment under high light intensity, stomatal conductance and the photosynthetic rate significantly reduced”
t0“Sweet Basil (Ocimum basilicum L.)”
Claim · model-written summary
Drought under high light significantly reduced photosynthetic rate after 14 days.
- Taxon
- sweet basilOcimum basilicumt0
- Treatment
- drought treatment under high light intensitye0
- Outcome
- photosynthetic ratee0
- Direction
- reducede0
- Qualifier
- Fourteen dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fourteen days after drought treatment under high light intensity, stomatal conductance and the photosynthetic rate significantly reduced”
t0“Sweet Basil (Ocimum basilicum L.)”
Claim · model-written summary
Under low light, stomatal conductance and photosynthetic rate were similar with and without drought.
- Taxon
- sweet basilOcimum basilicumt0
- Treatment
- drought treatmente0
- Outcome
- stomatal conductance and photosynthetic ratese0
- Direction
- similare0
- Qualifier
- low light intensitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants under low light intensity showed similar stomatal conductance and photosynthetic rates regardless of drought treatment”
t0“Sweet Basil (Ocimum basilicum L.)”
Claim · model-written summary
Drought reduced shoot and root dry weight more under high than low light.
- Taxon
- sweet basilOcimum basilicumt0
- Treatment
- droughte0
- Outcome
- shoot and root dry weightse0
- Direction
- declinee0
- Qualifier
- high light intensitye0
- Comparator
- low light intensitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“shoot and root dry weights revealed that plant growth decline caused by drought was more pronounced under high light intensity than under low light intensity”
t0“Sweet Basil (Ocimum basilicum L.)”
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