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Table 3 Predawn leaf water potentials (Ψpd) measured in field tests of C. arabica.

From: RBCS1 expression in coffee: Coffea orthologs, Coffea arabica homeologs, and expression variability between genotypes and under drought stress

Cultivar Y Irrigated (I)   Non-Irrigated (NI)  
   U WS   U WS  
I59 2008 -0.23 ± 0.09 -0.38 ± 0.10   -0.21 ± 0.05 -0.80 ± 0.12  
Rubi 2008 -0.19 ± 0.02 -0.22 ± 0.07   -0.19 ± 0.06 -1.88 ± 0.26  
I59 2009 -0.06 ± 0.02 -0.12 ± 0.00   -0.07 ± 0.02 -0.59 ± 0.03  
Rubi 2009 -0.06 ± 0.02 -0.11 ± 0.00   -0.13 ± 0.04 -1.20 ± 0.16  
Icatú 2010 nd <-4.0
Rubi 2010   <-4.0
Obatã 2010   <-4.0
I59 2010   <-4.0
Cultivar Y Irrigated (I) Non-Irrigated (NI)
   U1 WS U2 U1 WS U2
I59 2008 -0.41 ± 0.03 -0.37 ± 0.05 -0.14 ± 0.03 -0.66 ± 0.03 -1.35 ± 0.09 -0.15 ± 0.03
Rubi 2008 -0.28 ± 0.05 -0.20 ± 0.04 -0.17 ± 0.04 -0.45 ± 0.04 -1.96 ± 0.13 -0.18 ± 0.03
  1. Young (top) and adult (bottom) plants were grown under irrigated (I) or non-irrigated (NI) conditions. Ψpd values are expressed in mega-Pascal (MPa) and standard deviations (n = 9 leaves) are also indicated. For young plants, Ψpd was measured during the rainy season (U: unstressed) and the dry season (WS: water stress). For adult plants, Ψpd were measured only during the dry season (WS) under irrigated (I) or with the irrigation suspended for 90 days (NI) conditions. The points U1, WS and U2 corresponded to measurements before, during and after the return of irrigation, respectively. nd: Ψpd potentials were not determined but ranged from -0.1 to -0.2 MPa under irrigation. The year of analysis (Y) is also indicated.