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Table 2 Effect of cysteine (0, 20, and 40 mg/l) on photosynthetic pigments (mg/g fresh weight) and proline content (mg/100 g dry weight) of soybean leaf tissues irrigated with saline water (0, 3000, and 6000 mg/l). Results are means of two successive seasons

From: Physiological and biochemical responses of soybean (Glycine max L.) to cysteine application under sea salt stress

Treatment Chlorophyll a Chlorophyll b Carotenoid Proline
Salinity (mg/l) Cysteine (mg/l)
0 0 2.26 bc 0.72 ab 0.41 abcd 8.2 e
20 2.66 ab 0.794 ab 0.485 abc 9.8 d
40 3.20 a 1.19 a 0.42 abcd 10.7 d
3000 0 2.22 bc 0.36 bc 0.34 abcd 13.7 c
20 2.61 ab 0.69 abc 0.52 a 14.2 bc
40 2.54 ab 0.78 ab 0.49 ab 15.6 b
6000 0 1.75 c 0.15 bc 0.30 cd 17.6 a
20 2.14 bc 0.35 bc 0.31 bcd 18.7 a
40 2.04 bc 0.02 c 0.24 d 18.4 a
  1. Mean values (n = 3) in each column followed by a different letter are significantly different at ≤ 0.05 by Duncan’s multiple range test