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- W3107229687 abstract "Drought is one of the most important constraints to crop productivity worldwide. Control of plant responses to drought is very complex. The mechanisms and their intensity may differ between species and/or genotypes ultimately conditioning tolerance or susceptibility. We explore here the strategy set up by two oat cultivars to cope with drought based on root morphological, anatomical, physiological and molecular studies. A dramatic and rapid abscisic acid increase in the susceptible genotype resulted in a tight and rapid reduction of stomatal conductance. Despite of this, leaf water potential decreased concomitantly due to a decrease in root hydraulic conductivity. By contrast, the resistant genotype, showed a mild and slow increase in abscisic acid that allowed maintaining transpiration longer. This response was linked to an increase in root hydraulic conductance through an increase in total root length and in the length of the thinnest roots as well as a rise in root conductivity. This was also coupled with anatomical changes leading to a reduction of metabolic cost. These changes allowed the resistant genotype to maintain higher water potential reducing drought symptoms and promoting growth under water deficit conditions." @default.
- W3107229687 created "2020-12-07" @default.
- W3107229687 creator A5003493293 @default.
- W3107229687 creator A5019065211 @default.
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- W3107229687 creator A5040813192 @default.
- W3107229687 creator A5082010498 @default.
- W3107229687 creator A5082592623 @default.
- W3107229687 date "2021-02-01" @default.
- W3107229687 modified "2023-10-11" @default.
- W3107229687 title "Drought resistance in oat involves ABA-mediated modulation of transpiration and root hydraulic conductivity" @default.
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