Abstract
A significant effect of soil drought on the morphometric parameters of the leaves of barley plants of the Brovar variety, as well as the content of photosynthetic pigments (chlorophyll, carotenoids) in them was established. However, a significant decrease in plant growth indicators under drought conditions, a decrease in the amount of chlorophyll and, to a greater extent, carotenoids occurred against the background of the absence of a change in the content of pheophytin. We assume that the decrease in the number of pigments is mainly associated not with destruction due to stress, but with a decrease in their synthesis, which can be an adaptive reaction of plants, which minimizes the likelihood of formation of reactive oxygen species in photosynthetic membranes under conditions of drought, and also optimizes the use of light energy for photosynthetic processes under such conditions, as indicated by the predominant decrease in carotenoids such as neoxanthin, violaxanthin and β-carotene, which are actively involved in light harvesting and energy transfer to reaction centers.
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Claims 8
Claim · model-written summary
Soil drought significantly affected leaf morphometric parameters.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaree0 - Material
- Brovare0
- Organ / stage
- leavese0
- Treatment
- soil droughte0
- Outcome
- morphometric parameterse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“A significant effect of soil drought on the morphometric parameters of the leaves of barley plants of the Brovar variety”
Claim · model-written summary
Drought significantly decreased plant growth indicators.
- Taxon
- barleyHordeum vulgaret0
- Material
- Brovart0
- Treatment
- drought conditionse0
- Outcome
- plant growth indicatorse0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a significant decrease in plant growth indicators under drought conditions”
t0“barley plants of the Brovar variety”
Claim · model-written summary
Drought decreased chlorophyll content.
- Taxon
- barleyHordeum vulgaret0
- Material
- Brovart0
- Treatment
- soil droughte1
- Outcome
- amount of chlorophylle0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a decrease in the amount of chlorophyll”
e1“soil drought”
t0“barley plants of the Brovar variety”
Claim · model-written summary
Drought decreased carotenoids more strongly.
- Taxon
- barleyHordeum vulgaret0
- Material
- Brovart0
- Treatment
- soil droughte1
- Outcome
- carotenoidse0
- Direction
- decreasee2
- Qualifier
- to a greater extente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“and, to a greater extent, carotenoids occurred against the background of the absence of a change in the content of pheophytin”
e1“soil drought”
e2“a significant decrease in plant growth indicators under drought conditions”
t0“the content of photosynthetic pigments in barley plants of the Brovar variety”
Claim · model-written summary
Pheophytin content did not change under drought.
- Taxon
- barleyHordeum vulgaret0
- Material
- Brovart0
- Treatment
- soil droughte1
- Outcome
- content of pheophytine0
- Direction
- absence of a changee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the absence of a change in the content of pheophytin”
e1“soil drought”
t0“the content of photosynthetic pigments in barley plants of the Brovar variety”
Claim · model-written summary
Neoxanthin, violaxanthin and β-carotene decreased preferentially under drought.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- soil droughte1
- Outcome
- carotenoids such as neoxanthin, violaxanthin and β-carotenee0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the predominant decrease in carotenoids such as neoxanthin, violaxanthin and β-carotene”
e1“soil drought”
t0“the content of photosynthetic pigments in barley plants of the Brovar variety”
Claim · model-written summary
Authors hypothesize that reduced synthesis, rather than pigment destruction, explains pigment decreases.
- Taxon
- barleyHordeum vulgaret0
- Outcome
- decrease in the number of pigmentse0
- Qualifier
- decrease in their synthesise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the decrease in the number of pigments is mainly associated not with destruction due to stress, but with a decrease in their synthesis”
t0“barley plants of the Brovar variety”
Claim · model-written summary
Authors suggest pigment decline may minimize reactive oxygen species formation and optimize light use during drought.
- Taxon
- barleyHordeum vulgaret0
- Outcome
- formation of reactive oxygen speciese0
- Qualifier
- optimizes the use of light energye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which minimizes the likelihood of formation of reactive oxygen species in photosynthetic membranes under conditions of drought, and also optimizes the use of light energy for photosynthetic processes”
t0“barley plants of the Brovar variety”
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