Early morning fluctuations in trunk diameter are highly sensitive to water stress in nectarine trees
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Knowledge AreaProducción Vegetal
SponsorsThis research was supported by the Spanish Ministry of Science of Innovation (AGL2010-19201-C04-04), European project SIRRIMED (FP7-KBBE-2009-3-245159) and also by the Regional Science Agency of Murcia Region (08845/PI/08). We thank E. Fereres for editorial comments.
Bibliographic CitationDe la Rosa, J.M., Dodd, I.C., Domingo, R. et al. Early morning fluctuations in trunk diameter are highly sensitive to water stress in nectarine trees. Irrig Sci 34, 117–128 (2016) doi:10.1007/s00271-016-0491-y
Water stress integral
The sensitivity to water stress of different plant water status indicators was evaluated during two consecutive years in early nectarine trees grown in a semi-arid region. Measurements were made post-harvest and two irrigation treatments were applied: a control treatment (CTL), irrigated at 120 % of crop evapotranspiration demand to achieve non-limiting water conditions, and a deficit irrigation treatment, that applied around 37 % less water than CTL during late postharvest. The plant water status indicators evaluated were midday stem water potential (Ψ stem) and indices derived from trunk diameter fluctuations: maximum daily shrinkage (MDS), trunk daily growth rate, early daily shrinkage measured between 0900 and 1200 hours solar time (EDS), and late daily shrinkage that occurred between 1200 hours solar time and the moment that minimum trunk diameter was reached (typically 1600 hours solar time). The most sensitive [highest ratio of signal intensity (SI) to noise] indices to water ...
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