Abstract
The dynamics of the photosynthetic pigments content and parameters of oxidative stress with an increasing water deficit in the leaves of 40-days-old plants of two amaranth species - Amaranthus paniculatus L. (cv. Rubin) and Amaranthus caudatus L. (cv. Chyrvony aksamit), grown in a pot culture, was studied. Specific features of the development of water deficiency in amaranth leaves were revealed: amaranth plants Amaranthus paniculatus L. showed a stronger development of water deficit in leaves than Amaranthus caudatus L. after 4-days soil drought, which after 8 days increased in two species to 73.7 and 55.7 %, respectively. Under moderate drought, the amount of photosynthetic pigments (chlorophyll (Chl) and carotenoids) based on dry leaf weight increased in two amaranth species, but after 8 days of soil drought, the content of Chl ( a + b ) was reduced by 2.0-2.1 times, and carotenoids - 1.8-1.9 times relative to the physiological level. As a result of a 4-days soil drought in the leaves of Amaranthus paniculatus L., there was a significant decrease in the content of reactive oxygen species (ROS) and the activity of lipid peroxidation (LPO), while in Amaranthus caudatus L. an increase in the levels of ROS and LPO was observed. With an increase in the pressure of the stress factor in the leaves of amaranth of the two studied species, a decrease in the ROS content and LPO activity relative to physiological values was revealed. A conclusion was made about the different mechanisms of ROS generation and the flow of LPO processes at different stages of soil drought in the leaves of different amaranth species.
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Claims 10
Claim · model-written summary
After four days drought, A. paniculatus developed stronger leaf water deficit than A. caudatus.
- Taxon
- Amaranthus paniculatus L.
Amaranthus paniculatuse0 - Outcome
- water deficit in leavese0
- Direction
- strongere0
- Qualifier
- after 4-days soil droughte0
- Comparator
- Amaranthus caudatus L.e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Amaranthus paniculatus L. showed a stronger development of water deficit in leaves than Amaranthus caudatus L. after 4-days soil drought”
Claim · model-written summary
After eight days, A. paniculatus leaf water deficit reached 73.7%.
- Taxon
- Amaranthus paniculatus L.Amaranthus paniculatuse1
- Outcome
- water deficit in leavese1
- Direction
- increasede0
- Value
- 73.7e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“after 8 days increased in two species to 73.7 and 55.7 %, respectively”
e1“amaranth plants Amaranthus paniculatus L. showed a stronger development of water deficit in leaves than Amaranthus caudatus L.”
Claim · model-written summary
After eight days, A. caudatus leaf water deficit reached 55.7%.
- Taxon
- Amaranthus caudatus L.
.JPG?width=60)
Amaranthus caudatuse1 - Outcome
- increasede0
- Direction
- increasede0
- Value
- 55.7 %e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.JPG?width=500)
Verbatim
e0“after 8 days increased in two species to 73.7 and 55.7 %, respectively”
e1“Amaranthus caudatus L. (cv. Chyrvony aksamit)”
Claim · model-written summary
Moderate drought increased chlorophyll and carotenoids in both species.
- Taxon
- amaranthAmaranthus caudatuse0
- Outcome
- photosynthetic pigments (chlorophyll (Chl) and carotenoids)e0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under moderate drought, the amount of photosynthetic pigments (chlorophyll (Chl) and carotenoids) based on dry leaf weight increased in two amaranth species”
Claim · model-written summary
Eight days drought reduced chlorophyll content by 2.0-2.1 times.
- Taxon
- amaranthAmaranthus caudatuse1
- Outcome
- content of Chl ( a + b )e0
- Direction
- reducede0
- Value
- 2.0-2.1 timese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“after 8 days of soil drought, the content of Chl ( a + b ) was reduced by 2.0-2.1 times”
e1“in two amaranth species, but after 8 days of soil drought”
Claim · model-written summary
Eight days drought reduced carotenoids by 1.8-1.9 times.
- Taxon
- amaranthAmaranthus caudatust0
- Outcome
- carotenoidse0
- Direction
- reducede1
- Value
- 1.8-1.9 timese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“carotenoids - 1.8-1.9 times relative to the physiological level”
e1“after 8 days of soil drought, the content of Chl ( a + b ) was reduced by 2.0-2.1 times”
t0“amaranth species”
Claim · model-written summary
Four days drought decreased ROS content and LPO activity in A. paniculatus.
- Taxon
- Amaranthus paniculatus L.Amaranthus paniculatuse0
- Outcome
- content of reactive oxygen species (ROS) and the activity of lipid peroxidation (LPO)e0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the leaves of Amaranthus paniculatus L., there was a significant decrease in the content of reactive oxygen species (ROS) and the activity of lipid peroxidation (LPO)”
Claim · model-written summary
Four days drought increased ROS and LPO in A. caudatus.
- Taxon
- Amaranthus caudatus L.Amaranthus caudatuse0
- Outcome
- levels of ROS and LPOe0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in Amaranthus caudatus L. an increase in the levels of ROS and LPO was observed”
Claim · model-written summary
Greater stress reduced ROS content and LPO activity in both amaranth species.
- Taxon
- amaranthAmaranthus caudatuse0
- Outcome
- ROS content and LPO activitye0
- Direction
- decreasee0
- Comparator
- physiological valuese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the leaves of amaranth of the two studied species, a decrease in the ROS content and LPO activity relative to physiological values was revealed”
Claim · model-written summary
Authors infer different ROS generation and LPO mechanisms across drought stages and species.
- Taxon
- amaranthAmaranthus caudatuse0
- Outcome
- ROS generation and the flow of LPO processese0
- Qualifier
- different mechanismse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“different mechanisms of ROS generation and the flow of LPO processes at different stages of soil drought in the leaves of different amaranth species”