Abstract
Phosphorus (P) is an essential macronutrient, and an important component of plant metabolism. However, little is known about the effects of low P availability on P absorption, the photosynthetic electron transport chain, and the antioxidant system in cotton. This study used cotton genotypes (sensitive FJA and DLNTDH and tolerant BX014 and LuYuan343) with contrasting low-P tolerance in a hydroponic experiment under 15 µM, 50 µM, and 500 μM P concentrations. The results showed that low P availability reduced plant development and leaf area, shoot length, and dry weight in FJA and DLNADH, compared to BX014 and LuYuan343. The low P availability decreased the gas-exchange parameters such as the net photosynthetic rate, transpiration rate, and stomatal conductance, and increased the intercellular CO2 concentration. Chlorophyll a fluorescence demonstrated that the leaves’ absorption and trapped-energy flux were largely steady. In contrast, considerable gains in absorption and trapped-energy flux per reaction center resulted from decreases in the electron transport per reaction center under low-P conditions. In addition, low P availability reduced the activities of antioxidant enzymes and increased the content of malondialdehyde in the cotton genotypes, especially in FJA and DLNTDH. Moreover, low P availability reduced the activity of PEPC and generated a decline in the content of ATP and NADPH. Our research can provide a theoretical physiological basis for the growth and tolerance of cotton under low-P conditions.
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Claims 10
Claim · model-written summary
Low P reduced development, leaf area, shoot length and dry weight more in sensitive cotton genotypes than tolerant genotypes.
- Taxon
- cotton
Gossypium hirsutume1 - Material
- FJA and DLNADHe0
- Treatment
- low P availabilitye0
- Outcome
- plant development and leaf area, shoot length, and dry weighte0
- Direction
- reducede0
- Comparator
- BX014 and LuYuan343e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low P availability reduced plant development and leaf area, shoot length, and dry weight in FJA and DLNADH, compared to BX014 and LuYuan343”
e1“in cotton. This study used cotton genotypes”
Claim · model-written summary
Low P decreased net photosynthetic rate, transpiration rate and stomatal conductance in cotton.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- low P availabilitye0
- Outcome
- net photosynthetic rate, transpiration rate, and stomatal conductancee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The low P availability decreased the gas-exchange parameters such as the net photosynthetic rate, transpiration rate, and stomatal conductance”
e1“in cotton. This study used cotton genotypes”
Claim · model-written summary
Low P increased intercellular CO2 concentration in cotton.
- Taxon
- cottonGossypium hirsutume2
- Treatment
- low P availabilitye1
- Outcome
- intercellular CO2 concentratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased the intercellular CO2 concentration”
e1“The low P availability decreased the gas-exchange parameters”
e2“in cotton. This study used cotton genotypes”
Claim · model-written summary
Cotton leaf absorption and trapped energy flux remained largely steady under low P.
- Taxon
- cottonGossypium hirsutume2
- Treatment
- low-P conditionse1
- Outcome
- absorption and trapped-energy fluxe0
- Direction
- largely steadye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the leaves’ absorption and trapped-energy flux were largely steady”
e1“under low-P conditions. In addition”
e2“in cotton. This study used cotton genotypes”
Claim · model-written summary
Under low P, absorption and trapped energy flux per reaction center gained in cotton.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- low-P conditionse0
- Outcome
- absorption and trapped-energy flux per reaction centere0
- Direction
- gainse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“considerable gains in absorption and trapped-energy flux per reaction center resulted from decreases in the electron transport per reaction center under low-P conditions”
e1“in cotton. This study used cotton genotypes”
Claim · model-written summary
Electron transport per reaction center decreased under low P in cotton.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- low-P conditionse0
- Outcome
- electron transport per reaction centere0
- Direction
- decreasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreases in the electron transport per reaction center under low-P conditions”
e1“in cotton. This study used cotton genotypes”
Claim · model-written summary
Low P reduced antioxidant enzyme activities in cotton, especially FJA and DLNTDH.
- Taxon
- cottonGossypium hirsutume0
- Material
- FJA and DLNTDHe0
- Treatment
- low P availabilitye0
- Outcome
- activities of antioxidant enzymese0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low P availability reduced the activities of antioxidant enzymes and increased the content of malondialdehyde in the cotton genotypes, especially in FJA and DLNTDH”
Claim · model-written summary
Low P increased malondialdehyde content in cotton, especially FJA and DLNTDH.
- Taxon
- cottonGossypium hirsutume0
- Material
- FJA and DLNTDHe0
- Treatment
- low P availabilitye0
- Outcome
- content of malondialdehydee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low P availability reduced the activities of antioxidant enzymes and increased the content of malondialdehyde in the cotton genotypes, especially in FJA and DLNTDH”
Claim · model-written summary
Low P reduced PEPC activity in cotton.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- low P availabilitye0
- Gene
- PEPCe0
- Outcome
- activity of PEPCe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low P availability reduced the activity of PEPC and generated a decline in the content of ATP and NADPH”
e1“in cotton. This study used cotton genotypes”
Claim · model-written summary
Low P decreased ATP and NADPH content in cotton.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- low P availabilitye0
- Outcome
- content of ATP and NADPHe0
- Direction
- declinee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low P availability reduced the activity of PEPC and generated a decline in the content of ATP and NADPH”
e1“in cotton. This study used cotton genotypes”
The same questions in other papers
phosphorus · nutrient: content · Gossypium hirsutum (cotton)Results differ
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- positive
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This paper is about lacking the nutrient, so it counts the other way round here.
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7 papers in the same direction as this paper · 2 in the opposite direction
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
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See all 10 papers →phosphorus · physiology: photosynthesis · Gossypium hirsutum (cotton)Positive and negative results
7 papers in the same direction as this paper · 4 in the opposite direction
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See all 12 papers →phosphorus · physiology: antioxidant enzymes · Gossypium hirsutum (cotton)Results agree
1 paper in the same direction as this paper
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
phosphorus · physiology: oxidative · Gossypium hirsutum (cotton)Results agree
2 papers in the same direction as this paper
This paper is about lacking the nutrient, so it counts the other way round here.
- 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.