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@ARTICLE{Dodd:187907,
author = {Dodd, I. C. and Puertolas, J. and Huber, K. and
Perez-Perez, J. G. and Wright, H. R. and Blackwell, M. S.
A.},
title = {{T}he importance of soil drying and re-wetting in crop
phytohormonal and nutritional responses to deficit
irrigation},
journal = {The journal of experimental botany},
volume = {1},
number = {1},
issn = {0022-0957},
address = {Oxford},
publisher = {Univ. Press},
reportid = {FZJ-2015-01420},
pages = {eru532},
year = {2015},
abstract = {Soil drying and re-wetting (DRW) occurs at varying
frequencies and intensities during crop production, and is
deliberately used in water-saving irrigation techniques that
aim to enhance crop water use efficiency. Soil drying not
only limits root water uptake which can (but not always)
perturb shoot water status, but also alters root synthesis
of phytohormones and their transport to shoots to regulate
leaf growth and gas exchange. Re-wetting the soil rapidly
restores leaf water potential and leaf growth (minutes to
hours), but gas exchange recovers more slowly (hours to
days), probably mediated by sustained changes in root to
shoot phytohormonal signalling. Partial rootzone drying
(PRD) deliberately irrigates only part of the rootzone,
while the remainder is allowed to dry. Alternating these wet
and dry zones (thus re-wetting dry soil) substantially
improves crop yields compared with maintaining fixed wet and
dry zones or conventional deficit irrigation, and modifies
phytohormonal (especially abscisic acid) signalling.
Alternate wetting and drying (AWD) of rice can also improve
yield compared with paddy culture, and is correlated with
altered phytohormonal (including cytokinin) signalling. Both
PRD and AWD can improve crop nutrition, and re-wetting dry
soil provokes both physical and biological changes which
affect soil nutrient availability. Whether this alters crop
nutrient uptake depends on competition between plant and
microbes for nutrients, with the rate of re-wetting
determining microbial dynamics. Nevertheless, studies that
examine the effects of soil DRW on both crop nutritional and
phytohormonal responses are relatively rare; thus,
determining the cause(s) of enhanced crop yields under AWD
and PRD remains challenging.},
cin = {IBG-3},
ddc = {580},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {255 - Terrestrial Systems: From Observation to Prediction
(POF3-255) / 255 - Terrestrial Systems: From Observation to
Prediction (POF3-255)},
pid = {G:(DE-HGF)POF3-255 / G:(DE-HGF)POF3-255},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000353895000012},
pubmed = {pmid:25628330},
doi = {10.1093/jxb/eru532},
url = {https://juser.fz-juelich.de/record/187907},
}