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Effects of Postharvest Water Deficits on the Physiological Behavior of Early-Maturing Nectarine Trees
- Source :
- Digital.CSIC. Repositorio Institucional del CSIC, instname, Plants, Plants, Vol 9, Iss 1104, p 1104 (2020), Volume 9, Issue 9
- Publication Year :
- 2020
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2020.
-
Abstract
- © 2020 by the authors.<br />The physiological performance of early-maturing nectarine trees in response to water deficits was studied during the postharvest period. Two deficit irrigation treatments were applied, moderate and severe, and these were compared with a control treatment (fully irrigated). Stem water potential and leaf gas exchange (net CO2 assimilation rate, ACO2; transpiration rate, E; and stomatal conductance, gs) were measured frequently. Drought avoidance mechanisms included a decrease in stomatal conductance, especially in the case of the severe deficit treatment, which also showed a strong dependence of ACO2 on gs. Intrinsic water-use efficiency (ACO2/gs) was more sensitive than instantaneous water-use efficiency (ACO2/E) as an indicator to detect water deficit situations in nectarine trees. However, in contrast to the results obtained for other deciduous fruit trees, a poor correlation was found between ACO2/E and ACO2/gs, despite the important relation between E and gs. ACO2/E was also weakly correlated with gs, although this relationship clearly improved when the vapor pressure deficit (VPD) was included, along with gs as the independent variable. This fact reveals that apart from stomatal closure, E depends on the boundary layer conductance (gb), which is mediated by VPD through changes in wind speed. This suggests low values of the decoupling coefficient for this water-resilient species.<br />This research was supported by the Spanish Research Agency and co-financed by European Union FEDER funds (AEI/FEDER-UE, AGL2016-77282-C3-1R and PID2019-106226RB-C2-1) and “Fundación Séneca, Agencia de Ciencia y Tecnología” of the Region of Murcia under the Excellence Group Program (19903/GERM/15) projects.
- Subjects :
- 0106 biological sciences
Stomatal conductance
Vapour Pressure Deficit
Deficit irrigation
Midday stem water potential
Plant Science
Biology
01 natural sciences
midday stem water potential
Water deficit
Article
Vapor pressure deficit
Ecology, Evolution, Behavior and Systematics
Transpiration
water deficit
Ecology
Transpiration efficiency
vapor pressure deficit
Botany
Conductance
04 agricultural and veterinary sciences
Prunus persica L
Horticulture
Deciduous
transpiration efficiency
stomatal conductance
QK1-989
040103 agronomy & agriculture
Postharvest
0401 agriculture, forestry, and fisheries
010606 plant biology & botany
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Digital.CSIC. Repositorio Institucional del CSIC, instname, Plants, Plants, Vol 9, Iss 1104, p 1104 (2020), Volume 9, Issue 9
- Accession number :
- edsair.doi.dedup.....e79bf44fee7e20c641e36244bc103ec0