Abstract
Sugarcane ( Saccharum spp.) in south Florida is often subjected to flooding due to intense summer rainfall or tropical storms. While there has been considerable research on the response of sugarcane cultivars to high water tables, there is a lack of information on cultivar morphological adaptation to long‐term flooding. An experiment was established in Belle Glade, FL to examine: (i) effects of a July–September flood on the morphological characters of cv. CP 80‐1743 and CP 72‐2086 and (ii) significant flood × cultivar interactions that could be used to screen sugarcane germplasm. Sugarcane leaf, stem, primary root, adventitious root, and aerenchyma development were measured in the plant cane (2003) and second ratoon crops (2005). Morphological changes in response to flooding were similar in both years, with flooding leading to a 38% reduction in leaf weight, 4 to 15 times greater adventitious root development, 108% greater aerenchyma pipe extension, and 115% greater aerenchyma pipe diameter. Both cultivars responded to flooding by producing aboveground adventitious roots at the expense of belowground primary root biomass. A significant cultivar × flood interaction on aerenchyma extension and diameter was noted. Under nonflooded conditions, CP 72‐2086 produced constitutive aerenchyma more than halfway up the stalk, whereas CP 80‐1743 produced aerenchyma only 10% up the stalk. Aerenchyma development up the stalk may be a useful screening tool to identify flood‐tolerance in sugarcane cultivars.
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Claims 10
Claim · model-written summary
Flooding reduced sugarcane leaf weight by 38%.
- Taxon
- Sugarcanet0
- Organ / stage
- leafe0
- Treatment
- floodinge0
- Outcome
- leaf weighte0
- Direction
- reductione0
- Value
- 38%e0
Not reportedComparator
Verbatim
t0“Sugarcane”
e0“flooding leading to a 38% reduction in leaf weight”
Claim · model-written summary
Flooding increased adventitious root development four to fifteenfold.
- Taxon
- Sugarcanet0
- Organ / stage
- adventitious roote0
- Treatment
- floodinge0
- Outcome
- adventitious root developmente0
- Direction
- greatere0
- Value
- 4 to 15 timese0
Not reportedComparator
Verbatim
t0“Sugarcane”
e0“flooding leading to a 38% reduction in leaf weight, 4 to 15 times greater adventitious root development”
Claim · model-written summary
Flooding increased aerenchyma pipe extension by 108%.
- Taxon
- Sugarcanet0
- Organ / stage
- aerenchymae0
- Treatment
- floodinge0
- Outcome
- aerenchyma pipe extensione0
- Direction
- greatere0
- Value
- 108%e0
Not reportedComparator
Verbatim
t0“Sugarcane”
e0“flooding leading to a 38% reduction in leaf weight, 4 to 15 times greater adventitious root development, 108% greater aerenchyma pipe extension”
Claim · model-written summary
Flooding increased aerenchyma pipe diameter by 115%.
- Taxon
- Sugarcanet0
- Organ / stage
- aerenchymae0
- Outcome
- aerenchyma pipe diametere0
- Direction
- greatere0
- Value
- 115%e0
Not reportedTreatmentComparator
Verbatim
t0“Sugarcane”
e0“115% greater aerenchyma pipe diameter”
Claim · model-written summary
Both cultivars produced aboveground adventitious roots in response to flooding.
- Taxon
- Sugarcanet0
- Organ / stage
- aboveground adventitious rootse0
- Treatment
- floodinge0
- Outcome
- producing aboveground adventitious rootse0
Not reportedComparatorDirection
Verbatim
t0“Sugarcane”
e0“Both cultivars responded to flooding by producing aboveground adventitious roots at the expense of belowground primary root biomass”
Claim · model-written summary
Both cultivars lost belowground primary root biomass in response to flooding.
- Taxon
- Sugarcanet0
- Organ / stage
- belowground primary roote0
- Treatment
- floodinge0
- Outcome
- belowground primary root biomasse0
- Direction
- at the expense ofe0
Not reportedComparator
Verbatim
t0“Sugarcane”
e0“Both cultivars responded to flooding by producing aboveground adventitious roots at the expense of belowground primary root biomass”
Claim · model-written summary
Cultivar and flooding interacted significantly for aerenchyma extension and diameter.
Not reportedDirection
Verbatim
t0“Sugarcane”
e0“A significant cultivar × flood interaction on aerenchyma extension and diameter was noted”
Claim · model-written summary
Without flooding, CP 72‐2086 produced aerenchyma more than halfway up the stalk.
- Taxon
- Sugarcanet0
- Material
- CP 72‐2086e0
- Organ / stage
- stalke0
- Outcome
- constitutive aerenchymae0
- Value
- more than halfwaye0
- Qualifier
- nonflooded conditionse0
Not reportedDirection
Verbatim
t0“Sugarcane”
e0“Under nonflooded conditions, CP 72‐2086 produced constitutive aerenchyma more than halfway up the stalk”
Claim · model-written summary
Without flooding, CP 80‐1743 produced aerenchyma only 10% up the stalk.
Not reportedDirection
Verbatim
t0“Sugarcane”
e0“whereas CP 80‐1743 produced aerenchyma only 10% up the stalk”
Claim · model-written summary
Aerenchyma development up the stalk may help screen sugarcane flood tolerance.
Verbatim
e0“Aerenchyma development up the stalk may be a useful screening tool to identify flood‐tolerance in sugarcane cultivars”
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