Abstract
The objective of this study was to determine the effect of hybridisation with Trifolium uniflorum L. on drought resistance of Trifolium repens L. (white clover). Shoot dry weight of backcross 1 (BC1) hybrids was reduced less by water stress than for backcross 2 (BC2) hybrids and white clover, as were key morphological traits such as leaf area. Under water stress, important differences for the BC1 generation compared to white clover also included lower senescence, higher stolon density, increased root dry weight, and a higher maximum nodal root diameter. Drought decreased the net photosynthetic rate by up to 48% in BC2 and white clover, but there was no significant effect on the BC1 generation. BC1 hybrids were therefore more resistant to water stress than white clover. Smaller effects on stolon morphology suggest BC1 hybrids were better able to maintain cell turgor and growth, and maintenance of photosynthesis under drought may have contributed to smaller reductions in productivity. The findings suggest that BC1 hybrids may be able to maintain higher water uptake during drought than white clover by increased allocation to root biomass.
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Claims 11
Claim · model-written summary
Shoot dry weight of BC1 hybrids was reduced less by water stress than that of BC2 hybrids and white clover.
- Taxon
- white clover
Trifolium repense0 - Material
- backcross 1 (BC1) hybridse0
- Treatment
- water stresse0
- Outcome
- Shoot dry weighte0
- Direction
- reduced lesse0
- Comparator
- backcross 2 (BC2) hybrids and white clovere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot dry weight of backcross 1 (BC1) hybrids was reduced less by water stress than for backcross 2 (BC2) hybrids and white clover”
Claim · model-written summary
Leaf area of BC1 hybrids was also reduced less by water stress than that of BC2 hybrids and white clover.
- Taxon
- white cloverTrifolium repense0
- Material
- backcross 1 (BC1) hybridse0
- Treatment
- water stresse0
- Outcome
- leaf areae1
- Direction
- reduced lesse0
- Comparator
- backcross 2 (BC2) hybrids and white clovere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot dry weight of backcross 1 (BC1) hybrids was reduced less by water stress than for backcross 2 (BC2) hybrids and white clover”
e1“as were key morphological traits such as leaf area”
Claim · model-written summary
Under water stress, BC1 plants showed lower senescence than white clover.
- Taxon
- white cloverTrifolium repenst0
- Treatment
- water stresse0
- Outcome
- senescencee1
- Direction
- lowere1
- Comparator
- white clovert0
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“white clover”
e0“Under water stress”
e1“lower senescence”
Claim · model-written summary
Under water stress, BC1 plants had higher stolon density than white clover.
- Taxon
- white cloverTrifolium repenst0
- Treatment
- water stresse0
- Outcome
- stolon densitye1
- Direction
- highere1
- Comparator
- white clovert0
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“white clover”
e0“Under water stress”
e1“higher stolon density”
Claim · model-written summary
Under water stress, BC1 plants had increased root dry weight compared with white clover.
- Taxon
- white cloverTrifolium repenst0
- Treatment
- water stresse0
- Outcome
- root dry weighte1
- Direction
- increasede1
- Comparator
- white clovert0
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“white clover”
e0“Under water stress”
e1“increased root dry weight”
Claim · model-written summary
Under water stress, BC1 plants had a higher maximum nodal root diameter than white clover.
- Taxon
- white cloverTrifolium repenst0
- Treatment
- water stresse0
- Outcome
- maximum nodal root diametere1
- Direction
- highere1
- Comparator
- white clovert0
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“white clover”
e0“Under water stress”
e1“a higher maximum nodal root diameter”
Claim · model-written summary
Drought decreased the net photosynthetic rate by up to 48% in BC2 hybrids and white clover.
- Taxon
- white cloverTrifolium repense0
- Material
- BC2e0
- Treatment
- Droughte0
- Outcome
- net photosynthetic ratee0
- Direction
- decreasede0
- Value
- 48%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“white clover”
e0“Drought decreased the net photosynthetic rate by up to 48% in BC2 and white clover”
Claim · model-written summary
Drought had no significant effect on the net photosynthetic rate of the BC1 generation.
- Taxon
- white cloverTrifolium repenst0
- Material
- BC1 generatione1
- Treatment
- Droughte0
- Outcome
- net photosynthetic ratee0
- Direction
- no significant effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“white clover”
e0“Drought decreased the net photosynthetic rate”
e1“there was no significant effect on the BC1 generation”
Claim · model-written summary
BC1 hybrids were concluded to be more resistant to water stress than white clover.
- Taxon
- white cloverTrifolium repense0
- Material
- BC1 hybridse0
- Treatment
- water stresse0
- Outcome
- more resistant to water stresse0
- Direction
- more resistante0
- Comparator
- white clovere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BC1 hybrids were therefore more resistant to water stress than white clover”
Claim · model-written summary
Smaller effects on stolon morphology suggest that BC1 hybrids were better able to maintain cell turgor and growth.
- Taxon
- white cloverTrifolium repenst0
- Material
- BC1 hybridse0
- Outcome
- maintain cell turgor and growthe0
- Qualifier
- Smaller effects on stolon morphologye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“white clover”
e0“Smaller effects on stolon morphology suggest BC1 hybrids were better able to maintain cell turgor and growth”
Claim · model-written summary
BC1 hybrids may maintain higher water uptake during drought than white clover through increased allocation to root biomass.
- Taxon
- white cloverTrifolium repense0
- Material
- BC1 hybridse0
- Treatment
- droughte0
- Outcome
- higher water uptakee0
- Qualifier
- increased allocation to root biomasse0
- Comparator
- white clovere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BC1 hybrids may be able to maintain higher water uptake during drought than white clover by increased allocation to root biomass”
The same questions in other papers
drought · growth · Trifolium repens (white clover)Results differ
6 papers in the same direction as this paper · 21 in the opposite direction
- negative
- negative
- no effect
24 papers more in this group
See all 28 papers →drought · physiology: photosynthesis · Trifolium repens (white clover)Positive and negative results
5 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
4 papers more in this group
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.