Abstract
A greenhouse experiment was conducted to study the adaptive mechanism of cotton and peanut under water stress conditions. Five cultivars of cotton and six cultivars of peanut were grown in pots under two water levels; the control and water stress condition, where irrigation water equal to 100% and 50% of the daily transpiration, respectively, was daily applied. Peanut showed a greater increase than cotton in leaf temperature (Tl) and non-photochemical quenching (NPQ) and a greater decrease in water content per unit leaf area (WCLA), chlorophyll content and maximum quantum yield of photosystem II (PSII) (Fv/Fm) in the water stress condition. On the other hand, the water stress lowered the transpiration rate, actual quantum yield of PSII (ΔF/F’m) and leaf area (LA) more in cotton than in peanut. Cotton showed greater reduction in LA along with little reduction in the root dry weight (RDW) leading to high WCLA, while peanut showed increased RDW with little reduction in LA under the water stress condition. It was concluded that photodamage and down regulation in PSII were induced by water stress, coinciding with increases in leaf temperature regulated mainly by transpiration. Peanut showed more severe photodamage in PSII than cotton under the water stress condition.
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Claims 10
Claim · model-written summary
Peanut: leaf temperature (Tl) and non-photochemical quenching (NPQ) greater increase under water stress relative to cotton.
- Taxon
- Peanut
Arachis hypogaeae0 - Treatment
- water stress conditione0
- Outcome
- leaf temperature (Tl) and non-photochemical quenching (NPQ)e0
- Direction
- greater increasee0
- Comparator
- cottone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Peanut showed a greater increase than cotton in leaf temperature (Tl) and non-photochemical quenching (NPQ) and a greater decrease in water content per unit leaf area (WCLA), chlorophyll content and maximum quantum yield of photosystem II (PSII) (Fv/Fm) in the water stress condition”
Claim · model-written summary
Peanut: water content per unit leaf area (WCLA), chlorophyll content and maximum quantum yield of photosystem II (PSII) (Fv/Fm) greater decrease under water stress relative to cotton.
- Taxon
- PeanutArachis hypogaeae0
- Treatment
- water stress conditione0
- Outcome
- water content per unit leaf area (WCLA), chlorophyll content and maximum quantum yield of photosystem II (PSII) (Fv/Fm)e0
- Direction
- greater decreasee0
- Comparator
- cottone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Peanut showed a greater increase than cotton in leaf temperature (Tl) and non-photochemical quenching (NPQ) and a greater decrease in water content per unit leaf area (WCLA), chlorophyll content and maximum quantum yield of photosystem II (PSII) (Fv/Fm) in the water stress condition”
Claim · model-written summary
cotton: transpiration rate, actual quantum yield of PSII (ΔF/F’m) and leaf area (LA) lowered under water stress relative to peanut.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- water stresse0
- Outcome
- transpiration rate, actual quantum yield of PSII (ΔF/F’m) and leaf area (LA)e0
- Direction
- lowerede0
- Comparator
- peanute0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the water stress lowered the transpiration rate, actual quantum yield of PSII (ΔF/F’m) and leaf area (LA) more in cotton than in peanut”
Claim · model-written summary
Cotton: LA greater reduction under water stress relative to peanut.
- Taxon
- CottonGossypium hirsutume0
- Treatment
- water stress conditione0
- Outcome
- LAe0
- Direction
- greater reductione0
- Comparator
- peanute0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton showed greater reduction in LA along with little reduction in the root dry weight (RDW) leading to high WCLA, while peanut showed increased RDW with little reduction in LA under the water stress condition”
Claim · model-written summary
Cotton: root dry weight (RDW) little reduction under water stress relative to peanut.
- Taxon
- CottonGossypium hirsutume0
- Treatment
- water stress conditione0
- Outcome
- root dry weight (RDW)e0
- Direction
- little reductione0
- Comparator
- peanute0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton showed greater reduction in LA along with little reduction in the root dry weight (RDW) leading to high WCLA, while peanut showed increased RDW with little reduction in LA under the water stress condition”
Claim · model-written summary
Cotton: WCLA high under water stress relative to peanut.
- Taxon
- CottonGossypium hirsutume0
- Treatment
- water stress conditione0
- Outcome
- WCLAe0
- Direction
- highe0
- Comparator
- peanute0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton showed greater reduction in LA along with little reduction in the root dry weight (RDW) leading to high WCLA, while peanut showed increased RDW with little reduction in LA under the water stress condition”
Claim · model-written summary
peanut: RDW increased under water stress relative to Cotton.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- water stress conditione0
- Outcome
- RDWe0
- Direction
- increasede0
- Comparator
- Cottone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton showed greater reduction in LA along with little reduction in the root dry weight (RDW) leading to high WCLA, while peanut showed increased RDW with little reduction in LA under the water stress condition”
Claim · model-written summary
peanut: LA little reduction under water stress relative to Cotton.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- water stress conditione0
- Outcome
- LAe0
- Direction
- little reductione0
- Comparator
- Cottone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton showed greater reduction in LA along with little reduction in the root dry weight (RDW) leading to high WCLA, while peanut showed increased RDW with little reduction in LA under the water stress condition”
Claim · model-written summary
Water stress induced photodamage and down regulation in PSII.
- Taxon
- Cotton and PeanutGossypium hirsutumArachis hypogaeat0
- Treatment
- water stresse0
- Outcome
- photodamage and down regulation in PSIIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photodamage and down regulation in PSII were induced by water stress”
t0“Cotton and Peanut”
Claim · model-written summary
Peanut showed more severe PSII photodamage than cotton under water stress.
- Taxon
- PeanutArachis hypogaeae0
- Treatment
- water stress conditione0
- Outcome
- photodamage in PSIIe0
- Direction
- more severee0
- Comparator
- cottone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Peanut showed more severe photodamage in PSII than cotton under the water stress condition”