Abstract
Hypoxia tolerance studies in cotton are very rare in Pakistan. Unpredicted and excessive rainfalls result in severe losses to cotton crop in many regions of the country due to lack of hypoxia tolerance in current cotton varieties. The genotypes that can tolerate flooding are not reported earlier. The studies were conducted to explore hypoxia tolerance in local germplasm which will help to develop hypoxia tolerant cotton varieties. An experiment with randomized complete blocks was designed to study the hypoxia tolerance in different cotton varieties. The genotypes were given two treatments i.e., water logged and non-water logged conditions. The genotypes showed significant variability for yield, fiber and physiological traits. The hypoxia studies revealed that there is significant reduction for plant height in water sensitive genotype LRA-5166. The genotype MNH-786 showed better yield and MNH-556 showed superior ginning outturn percentage under water logged conditions. Staple length, strength and micronaire values also decreased under hypoxia. Similar pattern of negative effects were observed for Chlorophyll a, b contents and chl a/b ratio. Two hypoxia tolerant cultivars CIM-573 and MNH-564 had significantly higher chlorophyll a (1.664, 1.551) than other cultivars under both normal and waterlogged conditions. There was a significant decrease in total free amino acids in all genotypes/cultivars due to waterlogging. Free amino acid contents were significantly higher in two waterlogging sensitive cultivars, CEDIX and N-KRISHMA, than other cultivars under both non-waterlogged and waterlogged conditions. Waterlogging caused a significant reduction in shoot soluble proteins and increase in shoot proline. The genotype LRA-5166 was the highest in shoot soluble proteins content and showed significant decrease in shoot proline. With respect to yield MNH-786 showed better results and regarding ginning outturn percentage MNH-556 exhibited superior performance. The genotypes CIM-573 and MNH-564 showed higher chlorophyll a values. The above said genotypes may be exploited for further studies related to hypoxia tolerance.
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Claims 16
Claim · model-written summary
Cotton genotypes varied significantly in yield, fiber and physiological traits.
- Taxon
- cotton
Gossypium hirsutumt0 - Outcome
- yield, fiber and physiological traitse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The genotypes showed significant variability for yield, fiber and physiological traits”
t0“cotton (Gossypium hirsutum L.)”
Claim · model-written summary
Waterlogging significantly reduced height of LRA-5166.
- Taxon
- cottonGossypium hirsutumt0
- Material
- LRA-5166e0
- Treatment
- water loggede1
- Outcome
- plant heighte0
- Direction
- reductione0
- Comparator
- non-water logged conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant reduction for plant height in water sensitive genotype LRA-5166”
e1“water logged and non-water logged conditions”
t0“cotton (Gossypium hirsutum L.)”
Claim · model-written summary
MNH-786 had better yield under waterlogging.
- Taxon
- cottonGossypium hirsutumt0
- Material
- MNH-786e0
- Outcome
- yielde0
- Direction
- bettere0
- Qualifier
- water logged conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The genotype MNH-786 showed better yield”
e1“under water logged conditions”
t0“cotton (Gossypium hirsutum L.)”
Claim · model-written summary
MNH-556 had superior ginning outturn percentage under waterlogging.
- Taxon
- cottonGossypium hirsutumt0
- Material
- MNH-556e0
- Outcome
- ginning outturn percentagee0
- Direction
- superiore0
- Qualifier
- water logged conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MNH-556 showed superior ginning outturn percentage under water logged conditions”
t0“cotton (Gossypium hirsutum L.)”
Claim · model-written summary
Hypoxia decreased staple length, strength and micronaire.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- hypoxiae0
- Outcome
- Staple length, strength and micronaire valuese0
- Direction
- decreasede0
- Comparator
- non-water logged conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Staple length, strength and micronaire values also decreased under hypoxia”
e1“water logged and non-water logged conditions”
t0“cotton (Gossypium hirsutum L.)”
Claim · model-written summary
Hypoxia decreased chlorophyll a, chlorophyll b and their ratio.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- hypoxiae1
- Outcome
- Chlorophyll a, b contents and chl a/b ratioe0
- Direction
- decreaseinferrede0
- Comparator
- non-water logged conditionse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Similar pattern of negative effects were observed for Chlorophyll a, b contents and chl a/b ratio”
e1“under hypoxia”
e2“water logged and non-water logged conditions”
t0“cotton (Gossypium hirsutum L.)”
Claim · model-written summary
CIM-573 had significantly higher chlorophyll a than other cultivars in normal and waterlogged conditions.
- Taxon
- cottonGossypium hirsutumt0
- Material
- CIM-573e0
- Outcome
- chlorophyll ae0
- Direction
- highere0
- Value
- 1.664e0
- Qualifier
- under both normal and waterlogged conditionse0
- Comparator
- other cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CIM-573 and MNH-564 had significantly higher chlorophyll a (1.664, 1.551) than other cultivars under both normal and waterlogged conditions”
t0“cotton (Gossypium hirsutum L.)”
Claim · model-written summary
MNH-564 had significantly higher chlorophyll a than other cultivars in normal and waterlogged conditions.
- Taxon
- cottonGossypium hirsutumt0
- Material
- MNH-564e0
- Outcome
- chlorophyll ae0
- Direction
- highere0
- Value
- 1.551e0
- Qualifier
- under both normal and waterlogged conditionse0
- Comparator
- other cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CIM-573 and MNH-564 had significantly higher chlorophyll a (1.664, 1.551) than other cultivars under both normal and waterlogged conditions”
t0“cotton (Gossypium hirsutum L.)”
Claim · model-written summary
Waterlogging significantly decreased total free amino acids in all genotypes.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- waterlogginge0
- Outcome
- total free amino acidse0
- Direction
- decreasee0
- Comparator
- non-water logged conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant decrease in total free amino acids in all genotypes/cultivars due to waterlogging”
e1“water logged and non-water logged conditions”
t0“cotton (Gossypium hirsutum L.)”
Claim · model-written summary
CEDIX had significantly higher free amino acids than other cultivars under both water regimes.
- Taxon
- cottonGossypium hirsutumt0
- Material
- CEDIXe0
- Outcome
- Free amino acid contentse0
- Direction
- highere0
- Qualifier
- under both non-waterlogged and waterlogged conditionse0
- Comparator
- other cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Free amino acid contents were significantly higher in two waterlogging sensitive cultivars, CEDIX and N-KRISHMA, than other cultivars under both non-waterlogged and waterlogged conditions”
t0“cotton (Gossypium hirsutum L.)”
Claim · model-written summary
N-KRISHMA had significantly higher free amino acids than other cultivars under both water regimes.
- Taxon
- cottonGossypium hirsutumt0
- Material
- N-KRISHMAe0
- Outcome
- Free amino acid contentse0
- Direction
- highere0
- Qualifier
- under both non-waterlogged and waterlogged conditionse0
- Comparator
- other cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Free amino acid contents were significantly higher in two waterlogging sensitive cultivars, CEDIX and N-KRISHMA, than other cultivars under both non-waterlogged and waterlogged conditions”
t0“cotton (Gossypium hirsutum L.)”
Claim · model-written summary
Waterlogging significantly reduced shoot soluble proteins.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Waterlogginge0
- Outcome
- shoot soluble proteinse0
- Direction
- reductione0
- Comparator
- non-water logged conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Waterlogging caused a significant reduction in shoot soluble proteins and increase in shoot proline”
e1“water logged and non-water logged conditions”
t0“cotton (Gossypium hirsutum L.)”
Claim · model-written summary
Waterlogging increased shoot proline.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Waterlogginge0
- Outcome
- shoot prolinee0
- Direction
- increasee0
- Comparator
- non-water logged conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Waterlogging caused a significant reduction in shoot soluble proteins and increase in shoot proline”
e1“water logged and non-water logged conditions”
t0“cotton (Gossypium hirsutum L.)”
Claim · model-written summary
LRA-5166 had the highest shoot soluble protein content.
- Taxon
- cottonGossypium hirsutumt0
- Material
- LRA-5166e0
- Outcome
- shoot soluble proteins contente0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The genotype LRA-5166 was the highest in shoot soluble proteins content”
t0“cotton (Gossypium hirsutum L.)”
Claim · model-written summary
LRA-5166 showed a significant decrease in shoot proline.
- Taxon
- cottonGossypium hirsutumt0
- Material
- LRA-5166e0
- Outcome
- shoot prolinee0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LRA-5166 was the highest in shoot soluble proteins content and showed significant decrease in shoot proline”
t0“cotton (Gossypium hirsutum L.)”
Claim · model-written summary
The named tolerant genotypes may be used for further hypoxia tolerance studies.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- exploited for further studies related to hypoxia tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The above said genotypes may be exploited for further studies related to hypoxia tolerance”
t0“cotton (Gossypium hirsutum L.)”
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See all 8 papers →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.