Home > Publications database > Threshold response of stomatal closing ability to leaf abscisic acid concentration during growth > print |
001 | 141037 | ||
005 | 20210129212834.0 | ||
024 | 7 | _ | |a 10.1093/jxb/eru216 |2 doi |
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041 | _ | _ | |a English |
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100 | 1 | _ | |a Giday, H. |0 P:(DE-HGF)0 |b 0 |e Corresponding author |
245 | _ | _ | |a Threshold response of stomatal closing ability to leaf abscisic acid concentration during growth |
260 | _ | _ | |a Oxford |c 2014 |b Univ. Press |
336 | 7 | _ | |a Journal Article |b journal |m journal |0 PUB:(DE-HGF)16 |s 141037 |2 PUB:(DE-HGF) |
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520 | _ | _ | |a Leaf abscisic acid concentration ([ABA]) during growth influences morpho-physiological traits associated with the plant’s ability to cope with stress. A dose–response curve between [ABA] during growth and the leaf’s ability to regulate water loss during desiccation or rehydrate upon re-watering was obtained. Rosa hybrida plants were grown at two relative air humidities (RHs, 60% or 90%) under different soil water potentials (–0.01, –0.06, or –0.08MPa) or upon grafting onto the rootstock of a cultivar sustaining [ABA] at elevated RH. Measurements included [ABA], stomatal anatomical features, stomatal responsiveness to desiccation, and the ability of leaves, desiccated to varying degrees, to recover their weight (rehydrate) following re-watering. Transpiration efficiency (plant mass per transpired water) was also determined. Soil water deficit resulted in a lower transpiration rate and higher transpiration efficiency at both RHs. The lowest [ABA] was observed in well-watered plants grown at high RH. [ABA] was increased by soil water deficit or grafting, at both RHs. The growth environment-induced changes in stomatal size were mediated by [ABA]. When [ABA] was increased from the level of (well-watered) high RH-grown plants to the value of (well-watered) plants grown at moderate RH, stomatal responsiveness was proportionally improved. A further increase in [ABA] did not affect stomatal responsiveness to desiccation. [ABA] was positively related to the ability of dehydrated leaves to rehydrate. The data indicate a growth [ABA]-related threshold for stomatal sensitivity to desiccation, which was not apparent either for stomatal size or for recovery (rehydration) upon re-watering. |
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700 | 1 | _ | |a Ottosen, C. -O. |0 P:(DE-HGF)0 |b 4 |
773 | _ | _ | |a 10.1093/jxb/eru216 |g Vol. 65, no. 15, p. 4361 - 4370 |0 PERI:(DE-600)1466717-4 |n 15 |p 4361 - 4370 |t The @journal of experimental botany |v 65 |y 2014 |x 0022-0957 |
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