Abstract
Pearl millet is better adapted to hot and semi-arid conditions than most other major cereals. The objective of this study was to compare the deep water uptake ability and water use efficiency (WUE) of pearl millet among millet species. First, the WUE of six millet species was evaluated in pots under waterlogging, well-watered (control), and drought conditions. Secondly, the water uptake from deep soil layers by pearl millet and barnyard millet, which showed the highest drought and waterlogging tolerance, respectively, was compared in long tubes which consisted of three parts (two loose soil layers separated by a hardpan and a Vaseline layer). Soil moisture was adjusted to well-watered and drought conditions in the upper (topsoil) layer, while the lower (deep) layer was always kept wet. WUE was significantly reduced in all millet species by waterlogging but not by drought. The ratio of WUE to the control condition indicated that pearl millet had the highest and lowest resistances to drought and waterlogging conditions, respectively, while barnyard millet was the most stable under both conditions. The deuterium concentration in xylem sap water, relative water uptake from deep soil layers, and water uptake efficiency of deep roots were significantly increased in barnyard millet but not in pearl millet by drought in topsoil layers. In conclusion, the drought resistance of pearl millet is explained by higher WUE but not by increased water uptake efficiency in deep soil layers as compared to barnyard millet, another drought-resistant millet species.
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Claims 11
Claim · model-written summary
Waterlogging significantly reduced WUE in all millet species.
Not reportedComparator
Verbatim
e0“WUE was significantly reduced in all millet species by waterlogging but not by drought”
Claim · model-written summary
Drought did not significantly reduce WUE in millet species.
Not reportedComparator
Verbatim
e0“WUE was significantly reduced in all millet species by waterlogging but not by drought”
Claim · model-written summary
Pearl millet had the highest resistance to drought among millet species.
- Taxon
- pearl millet
Cenchrus americanuse0 - Outcome
- resistances to droughte0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pearl millet had the highest and lowest resistances to drought and waterlogging conditions, respectively”
Claim · model-written summary
Pearl millet had the lowest resistance to waterlogging among millet species.
- Taxon
- pearl milletCenchrus americanuse0
- Outcome
- waterlogging conditionse0
- Direction
- loweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pearl millet had the highest and lowest resistances to drought and waterlogging conditions, respectively”
Claim · model-written summary
Barnyard millet had the most stable WUE under drought and waterlogging.
Verbatim
e0“barnyard millet was the most stable under both conditions”
e1“The ratio of WUE to the control condition”
Claim · model-written summary
Topsoil drought significantly increased deuterium concentration in barnyard millet xylem sap water.
- Taxon
- barnyard millete0
- Treatment
- drought in topsoil layerse0
- Outcome
- deuterium concentration in xylem sap watere0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“The deuterium concentration in xylem sap water, relative water uptake from deep soil layers, and water uptake efficiency of deep roots were significantly increased in barnyard millet but not in pearl millet by drought in topsoil layers”
Claim · model-written summary
Topsoil drought significantly increased relative deep-soil water uptake in barnyard millet.
- Taxon
- barnyard millete0
- Treatment
- drought in topsoil layerse0
- Outcome
- relative water uptake from deep soil layerse0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“relative water uptake from deep soil layers, and water uptake efficiency of deep roots were significantly increased in barnyard millet but not in pearl millet by drought in topsoil layers”
Claim · model-written summary
Topsoil drought significantly increased deep-root water uptake efficiency in barnyard millet.
- Taxon
- barnyard millete0
- Treatment
- drought in topsoil layerse0
- Outcome
- water uptake efficiency of deep rootse0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“water uptake efficiency of deep roots were significantly increased in barnyard millet but not in pearl millet by drought in topsoil layers”
Claim · model-written summary
Topsoil drought did not significantly increase deep-water uptake measures in pearl millet.
- Taxon
- pearl milletCenchrus americanuse0
- Treatment
- drought in topsoil layerse0
- Outcome
- deuterium concentration in xylem sap water, relative water uptake from deep soil layers, and water uptake efficiency of deep rootse0
- Direction
- no_changeinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The deuterium concentration in xylem sap water, relative water uptake from deep soil layers, and water uptake efficiency of deep roots were significantly increased in barnyard millet but not in pearl millet by drought in topsoil layers”
Claim · model-written summary
Authors attribute pearl millet drought resistance to higher WUE than barnyard millet.
- Taxon
- pearl milletCenchrus americanuse0
- Outcome
- drought resistancee0
- Qualifier
- higher WUEe0
- Comparator
- barnyard millete0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought resistance of pearl millet is explained by higher WUE but not by increased water uptake efficiency in deep soil layers as compared to barnyard millet”
Claim · model-written summary
Authors do not attribute pearl millet drought resistance to increased deep-soil water uptake efficiency.
- Taxon
- pearl milletCenchrus americanuse0
- Outcome
- drought resistancee0
- Qualifier
- increased water uptake efficiency in deep soil layerse0
- Comparator
- barnyard millete0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought resistance of pearl millet is explained by higher WUE but not by increased water uptake efficiency in deep soil layers as compared to barnyard millet”
The same questions in other papers
drought · physiology: water · Cenchrus americanus (pearl millet)Positive and negative results
7 papers in the same direction as this paper · 2 in the opposite direction
- negative
- positive
- positive
6 papers more in this group
See all 10 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.