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Open AccessArticle

Effects of Water Deficits on Prosopis tamarugo Growth, Water Status and Stomata Functioning

by 1,2,* and 2,*
1
Programa Magister en Ciencias Agropecuarias, Facultad de Ciencias Agronómicas, Universidad de Chile, Santa Rosa, La Pintana, Santiago 11315, Chile
2
Laboratory Relation Soil-Water-Plant (SAP), Department of Agricultural Production, Faculty of Agronomic Sciences, University of Chile, Santiago 1004, Chile
*
Authors to whom correspondence should be addressed.
Plants 2021, 10(1), 53; https://doi.org/10.3390/plants10010053
Received: 11 December 2020 / Revised: 22 December 2020 / Accepted: 22 December 2020 / Published: 29 December 2020
(This article belongs to the Special Issue Effects of Abiotic Stress on Plants 2020–2021)
The effect of water deficit on growth, water status and stomatal functioning of Prosopis tamarugo was investigated under controlled water conditions. The study was done at the Antumapu Experiment Station of the University of Chile. Three levels of water stress were tested: (i) well-watered (WW), (ii) medium stress intensity (low-watered (LW)) and (iii) intense stress (non-watered (NW)), with 10 replicates each level. All growth parameters evaluated, such as twig growth, specific leaf area and apical dominance index, were significantly decreased under water deficit. Tamarugo twig growth decreased along with twig water potential. The stomatal conductance and CO2 assimilation decreased significantly under the water deficit condition. Tamarugo maintained a high stomatal conductance at low leaf water potential. In addition, tamarugo reduced its leaf area as a strategy to diminish the water demand. These results suggest that, despite a significant decrease in water status, tamarugo can maintain its growth at low leaf water potential and can tolerate intense water deficit due to a partial stomatal closing strategy that allows the sustaining of CO2 assimilation in the condition of reduced water availability. View Full-Text
Keywords: water potential; drought; water depletion; twig elongation water potential; drought; water depletion; twig elongation
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MDPI and ACS Style

Time, A.; Acevedo, E. Effects of Water Deficits on Prosopis tamarugo Growth, Water Status and Stomata Functioning. Plants 2021, 10, 53. https://doi.org/10.3390/plants10010053

AMA Style

Time A, Acevedo E. Effects of Water Deficits on Prosopis tamarugo Growth, Water Status and Stomata Functioning. Plants. 2021; 10(1):53. https://doi.org/10.3390/plants10010053

Chicago/Turabian Style

Time, Alson; Acevedo, Edmundo. 2021. "Effects of Water Deficits on Prosopis tamarugo Growth, Water Status and Stomata Functioning" Plants 10, no. 1: 53. https://doi.org/10.3390/plants10010053

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