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Sorghum and Salinity

I. Response of Growth, Water Relations, and Ion Accumulation to NaCl Salinity

^a Department of Botany, Faculty of Science, Maseno University, P.O. Private Bag, Maseno, Kenya
^b Department of Plant Physiology, University of Bayreuth, Universitätstraße 30, 95440, Bayreuth, Germany

View larger version (24K): [in a new window]   Fig. 1. Effects of increasing NaCl concentration in the irrigation medium on plant dry weight of sorghum varieties Serena and Seredo. Means of 4 replicates ±SD. [LSD (0.05) = 0.45.]

View larger version (45K): [in a new window]   Fig. 2. Effects of increasing NaCl concentration in the irrigation medium on dry weight of leaf blades (A and B) and leaf sheaths (C and D) of sorghum varieties Serena and Seredo. Means of 4 replicates ±SD. Leaf 5 is the oldest and leaf 9 is the youngest. [LSD (0.05) = 0.08.]

View larger version (65K): [in a new window]   Fig. 3. Effects of increasing NaCl concentration in the irrigation medium on concentration of sodium ions of roots (A), stems (B), leaf blades (C and D), and leaf sheaths (E and F) of sorghum varieties Serena and Seredo. Means of 4 replicates ±SD. [LSD (0.05) = 161.3 (A), 184.4 (B), 16.9 (C and D), and 32.2 (E and F)].

View larger version (45K): [in a new window]   Fig. 4. Effects of increasing NaCl concentration in the irrigation medium on concentration of potassium ions of roots (A), stems (B), and leaf sheaths (C and D) of the sorghum varieties Serena and Seredo. Means of 4 replicates ±SD. [LSD (0.05) = 12.5 (A), 11.6 (B), and 303.3 (C and D)].

View larger version (65K): [in a new window]   Fig. 5. Effects of increasing NaCl concentration in the irrigation medium on concentration of calcium ions of roots (A), stems (B), leaf blades (C and D), and leaf sheaths (E and F) of sorghum varieties Serena and Seredo. Means of 4 replicates ±SD. [LSD (0.05) = 19.9 (A), 10.8 (B), 55.4 (C and D), and 17.0 (E and F)].

View larger version (67K): [in a new window]   Fig. 6. Effects of increasing NaCl concentration in the irrigation medium on concentration of magnesium ions of roots (A), stems (B), leaf blades (C and D), and leaf sheaths (E and F) of sorghum varieties Serena and Seredo. Means of 4 replicates ±SD. [LSD (0.05) = 21.5 (A), 29.1 (B), 51.5 (C and D), and 50.6 (E and F)].