Abstract
Waterlogging is a serious environmental stress on winter wheat ( Triticum aestivum L.) grown in the Gulf Coast region. We hypothesized that waterlogging tolerance differs in currently available lines and cultivars and that suitability of physiological parameters to distinguish yield responses could be evaluated. Three types of studies were conducted: a 2‐yr greenhouse study of eight cultivars, a 4‐yr irrigated field study of 20 cultivars and breeding lines, and a 3‐yr field study of six cultivars under rain‐excluding shelters which allowed comparison of performance under waterlogged and well‐drained conditions. In the rainshelter study, waterlogging caused a 45% decrease in grain weight, resulting from a 45% decrease in number of kernels and a 5% decrease in kernel weight. Cultivars differed for grain yield under waterlogged conditions in the field ( P = 0.1), and Coker 9877 and line LA 862A16‐3‐3‐X yielded 32 and 33% above the mean, respectively. Greenhouse measures of photosynthesis under waterlogging were weakly predictive of yield ( r 2 = 0.61) and correlated to measures under well‐drained conditions ( r 2 = 0.87). Yield was well correlated with biomass ( r 2 = 0.84) and root mineral content (Fe + Mn + P) ( r 2 = 0.94). Waterlogged yields × cultivar did not correlate with yield under well‐drained conditions ( r 2 = 0.14) and the same differential response to waterlogging was shown for biomass and root mineral content. The negative correlation between root mineral content and yield was attributed to processes involved in the formation of a mineral plaque on the surface of the wheat roots. This emphasizes the need to explore differences in root function when selecting wheat lines for enhanced waterlogging tolerance.
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Claims 15
Claim · model-written summary
Waterlogging decreased grain weight by 45%.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- waterlogginge0
- Outcome
- grain weighte0
- Direction
- decreasee0
- Value
- 45%e0
- Comparator
- well‐drained conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“waterlogging caused a 45% decrease in grain weight”
e1“waterlogged and well‐drained conditions”
t0“Wheat”
Claim · model-written summary
Waterlogging decreased kernel number by 45%.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- waterlogginge1
- Outcome
- number of kernelse0
- Direction
- decreasee0
- Value
- 45%e0
- Comparator
- well‐drained conditionse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a 45% decrease in number of kernels”
e1“waterlogging caused”
e2“waterlogged and well‐drained conditions”
t0“Wheat”
Claim · model-written summary
Waterlogging decreased kernel weight by 5%.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- waterlogginge1
- Outcome
- kernel weighte0
- Direction
- decreasee0
- Value
- 5%e0
- Comparator
- well‐drained conditionse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a 5% decrease in kernel weight”
e1“waterlogging caused”
e2“waterlogged and well‐drained conditions”
t0“Wheat”
Claim · model-written summary
Cultivars differed in waterlogged field grain yield.
- Taxon
- wheatTriticum aestivumt0
- Material
- Cultivarse0
- Outcome
- grain yielde0
- Direction
- differede0
- Setting
- in the fielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cultivars differed for grain yield under waterlogged conditions in the field ( P = 0.1)”
t0“Wheat”
Claim · model-written summary
Coker 9877 yielded 32% above the mean.
- Taxon
- WheatTriticum aestivumt0
- Material
- Coker 9877e0
- Outcome
- yieldede0
- Direction
- abovee0
- Value
- 32e1
- Comparator
- the meane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Coker 9877 and line LA 862A16‐3‐3‐X yielded 32 and 33% above the mean, respectively”
e1“32 and 33%”
t0“Wheat”
Claim · model-written summary
LA 862A16‐3‐3‐X yielded 33% above the mean.
- Taxon
- WheatTriticum aestivumt0
- Material
- LA 862A16‐3‐3‐Xe0
- Outcome
- yieldede0
- Direction
- abovee0
- Value
- 33%e0
- Comparator
- the meane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Coker 9877 and line LA 862A16‐3‐3‐X yielded 32 and 33% above the mean, respectively”
t0“Wheat”
Claim · model-written summary
Greenhouse photosynthesis under waterlogging weakly predicted yield.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- waterlogginge0
- Outcome
- yielde0
- Value
- r 2 = 0.61e0
- Qualifier
- weakly predictivee0
- Setting
- Greenhousee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Greenhouse measures of photosynthesis under waterlogging were weakly predictive of yield ( r 2 = 0.61)”
t0“Wheat”
Claim · model-written summary
Photosynthesis under waterlogging correlated with well-drained measures.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- waterlogginge1
- Outcome
- measurese0
- Value
- r 2 = 0.87e0
- Comparator
- well‐drained conditionse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“correlated to measures under well‐drained conditions ( r 2 = 0.87)”
e1“photosynthesis under waterlogging”
t0“Wheat”
Claim · model-written summary
Yield correlated with biomass.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- waterlogginge1
- Outcome
- Yielde0
- Value
- r 2 = 0.84e0
- Qualifier
- biomasse0
Not reportedOrgan / stageDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield was well correlated with biomass ( r 2 = 0.84)”
e1“the same differential response to waterlogging”
t0“Wheat”
Claim · model-written summary
Yield correlated with root mineral content.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- roote0
- Compound
- Fe + Mn + Pe0
- Outcome
- Yielde0
- Value
- r 2 = 0.94e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield was well correlated with biomass ( r 2 = 0.84) and root mineral content (Fe + Mn + P) ( r 2 = 0.94)”
t0“Wheat”
Claim · model-written summary
Waterlogged cultivar yields did not correlate with well-drained yields.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- Waterlogged yieldse0
- Value
- r 2 = 0.14e0
- Comparator
- yield under well‐drained conditionse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Waterlogged yields × cultivar did not correlate with yield under well‐drained conditions ( r 2 = 0.14)”
t0“Wheat”
Claim · model-written summary
Biomass showed the same differential response to waterlogging.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- waterlogginge0
- Outcome
- biomasse0
- Direction
- differential responsee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the same differential response to waterlogging was shown for biomass and root mineral content”
t0“Wheat”
Claim · model-written summary
Root mineral content showed the same differential response to waterlogging.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- roote0
- Treatment
- waterlogginge0
- Outcome
- root mineral contente0
- Direction
- differential responsee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the same differential response to waterlogging was shown for biomass and root mineral content”
t0“Wheat”
Claim · model-written summary
The negative root mineral content-yield correlation was attributed to mineral plaque formation.
- Taxon
- wheatTriticum aestivume0
- Outcome
- negative correlation between root mineral content and yielde0
- Qualifier
- formation of a mineral plaque on the surface of the wheat rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The negative correlation between root mineral content and yield was attributed to processes involved in the formation of a mineral plaque on the surface of the wheat roots”
Claim · model-written summary
The authors recommend exploring root function when selecting waterlogging-tolerant lines.
- Taxon
- wheatTriticum aestivume0
- Outcome
- explore differences in root function when selecting wheat lines for enhanced waterlogging tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the need to explore differences in root function when selecting wheat lines for enhanced waterlogging tolerance”
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