Abstract
Banana (Musa spp.), an important staple food in the tropical and subtropical regions, is highly susceptible to drought. Developing drought-tolerant bananas using available germplasm offers a long-term solution to mitigate drought effects. The East and Central Africa Banana Germplasm Collection in Uganda contains genetically diverse genotypes whose potential for drought tolerance breeding is yet to be established. This study aimed to determine the response of 14 Musa spp. genotypes to drought stress using phenotypic and physiological traits in order to select promising genotypes for use in breeding. Two genotypes with a known reaction to water deficit conditions were included as local checks. Three-month-old tissue culture-derived plantlets were completely deprived of water for four weeks while control plants were regularly irrigated back to field capacity, and both sets maintained under screen-house conditions. Drought stress resulted in significant reductions in plant height, total leaf area, number of leaf cigars and functional leaves, total dry matter, chlorophyll and relative water content. Water use efficiency (WUE) of 12 genotypes increased under stress conditions. Stomatal conductance was affected by the genotype-porometer reading time interaction. Genotype “ITC.0987” was the most tolerant, considering that moisture stress had the least effect on its above-ground growth. Among the improved diploids, “TMB2x9722-1” had the least total dry matter reduction and highest WUE, while “TMB2x9172” showed the least decrease in relative water content and highest root-shoot ratio increase under stress. Thus, “ITC.0987”, “TMB2x9722-1” and “TMB2x9172” are essential drought-tolerant candidates that may be utilized in breeding.
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Claims 10
Claim · model-written summary
Drought significantly reduced plant height, total leaf area and leaf numbers.
- Treatment
- Drought stresse0
- Outcome
- plant height, total leaf area, number of leaf cigars and functional leavese0
- Direction
- reductionse0
MusaNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress resulted in significant reductions in plant height, total leaf area, number of leaf cigars and functional leaves, total dry matter, chlorophyll and relative water content.”
t0“banana ( Musa spp.)”
Claim · model-written summary
Drought significantly reduced total dry matter, chlorophyll and relative water content.
- Treatment
- Drought stresse0
- Outcome
- total dry matter, chlorophyll and relative water contente0
- Direction
- reductionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress resulted in significant reductions in plant height, total leaf area, number of leaf cigars and functional leaves, total dry matter, chlorophyll and relative water content.”
t0“banana ( Musa spp.)”
Claim · model-written summary
Water use efficiency increased under stress in 12 genotypes.
- Treatment
- stress conditionse0
- Outcome
- Water use efficiency (WUE)e0
- Direction
- increasede0
- Qualifier
- 12 genotypese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water use efficiency (WUE) of 12 genotypes increased under stress conditions.”
t0“banana ( Musa spp.)”
Claim · model-written summary
Stomatal conductance depended on the interaction between genotype and porometer reading time.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stomatal conductance was affected by the genotype-porometer reading time interaction.”
t0“banana ( Musa spp.)”
Claim · model-written summary
ITC.0987 was most tolerant, with the least effect on above-ground growth.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Genotype “ITC.0987” was the most tolerant, considering that moisture stress had the least effect on its above-ground growth.”
t0“banana ( Musa spp.)”
Claim · model-written summary
TMB2x9722-1 had the least total dry matter reduction among improved diploids.
- Material
- TMB2x9722-1e0
- Treatment
- stresse0
- Outcome
- total dry mattere0
- Direction
- least total dry matter reductione0
- Comparator
- improved diploidse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among the improved diploids, “TMB2x9722-1” had the least total dry matter reduction and highest WUE, while “TMB2x9172” showed the least decrease in relative water content and highest root-shoot ratio increase under stress.”
t0“banana ( Musa spp.)”
Claim · model-written summary
TMB2x9722-1 had the highest water use efficiency among improved diploids.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among the improved diploids, “TMB2x9722-1” had the least total dry matter reduction and highest WUE, while “TMB2x9172” showed the least decrease in relative water content and highest root-shoot ratio increase under stress.”
t0“banana ( Musa spp.)”
Claim · model-written summary
TMB2x9172 had the least decrease in relative water content under stress.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0““TMB2x9172” showed the least decrease in relative water content and highest root-shoot ratio increase under stress.”
t0“banana ( Musa spp.)”
Claim · model-written summary
TMB2x9172 had the highest increase in root-shoot ratio under stress.
- Material
- TMB2x9172e0
- Treatment
- stresse0
- Outcome
- root-shoot ratioe0
- Direction
- highest root-shoot ratio increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0““TMB2x9172” showed the least decrease in relative water content and highest root-shoot ratio increase under stress.”
t0“banana ( Musa spp.)”
Claim · model-written summary
ITC.0987, TMB2x9722-1 and TMB2x9172 were identified as drought-tolerant breeding candidates.
- Outcome
- drought-tolerant candidates that may be utilized in breedinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0““ITC.0987”, “TMB2x9722-1” and “TMB2x9172” are essential drought-tolerant candidates that may be utilized in breeding.”
t0“banana ( Musa spp.)”
The same questions in other papers
drought · growth · MusaResults differ
2 papers in the same direction as this paper · 9 in the opposite direction
- negative
- negative
- positive
8 papers more in this group
See all 12 papers →drought · physiology: water · MusaPositive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- negative
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.