The Scientific World Journal / 2012 / Article / Tab 2

Research Article

Differential Responses of Two Broccoli (Brassica oleracea L. var Italica) Cultivars to Salinity and Nutritional Quality Improvement

Table 2

Effects of salt stress on ion levels in the shoots and roots of cultivars Parthenon and Naxos treated with different concentrations of NaCl for 15 days. Values are means ± standard errors ( 𝑛 = 5 ). Means followed by different letters are significantly different according to Tukey's test at 𝑃 < 0 . 0 5 . The significance of the difference between the two cultivars is given according to the Student’s t-test, with * 𝑃 < 0 . 0 5 , ** 𝑃 < 0 . 0 1 , *** 𝑃 < 0 . 0 0 1 ; n.s: non-significant.

Plant partCultivarNaCl (mM)Cations (mmol kg DW−1)Anions (mmol kg DW−1)
N a + K + C a 2 + M g 2 + C l N O 3 P O 4 3 S O 4 2

Shoots
Parthenon04 ± 0.15 a1292 ± 19.81 a902 ± 14.50 a143 ± 4.08 a11.61 ± 0.69 a86.32 ± 1.17 a5.05 ± 0.33 a14.39 ± 0.29 b
30901 ± 25.13 b920 ± 11.26 b727 ± 11.20 b121 ± 2.12 b58.58 ± 3.62 b74.56 ± 1.28 b6.51 ± 0.06 b16.18 ± 0.38 c
601438 ± 16.94 c663 ± 21.41 c645 ± 11.29 c109 ± 1.81 b84.64 ± 4.11 c60.67 ± 0.42 c6.53 ± 0.12 b14.05 ± 0.06 b
901878 ± 73.24 d540 ± 20.86 d588 ± 26.16 c112 ± 5.30 b145.26 ± 10.90 d48.44 ± 3.40 d6.34 ± 0.34 b10.43 ± 0.51 a
Naxos019 ± 2.53 a1290 ± 32.74 a884 ± 11.51 a159 ± 2.28 a10.38 ± 0.67 a76.22 ± 5.01 a2.84 ± 0.65 a12.56 ± 0.74 a
301023 ± 50.65 b795 ± 17.81 b743 ± 6.21 b139 ± 1.74 b48.05 ± 6.37 b57.21 ± 1.90 b4.37 ± 0.20 b11.66 ± 0.47 a
601536 ± 43.54 c669 ± 8.10 c696 ± 12.00 c140 ± 2.46 b68.37 ± 2.03 c50.47 ± 3.90 bc5.07 ± 0.22 b11.27 ± 0.08 ab
902120 ± 86.19 d546 ± 25.90 d557 ± 10.08 d128 ± 1.61 c154.83 ± 5.64 d43.46 ± 1.17 c5.08 ± 0.19 b9.23 ± 0.80 b
0 **n.s.n.s. *n.s.n.s. *n.s.
Significance between the two30n.s. ***n.s. ***n.s. *** *** ***
cultivars for the shoot ion composition60n.s.n.s. * *** **n.s. ** ***
90n.s.n.s.n.s. *n.s.n.s. *n.s.

Roots
Parthenon08 ± 1.10 a1295 ± 79.35 a255 ± 26.65 a99 ± 6.96 a6.75 ± 2.01 a48.72 ± 4.73 a9.75 ± 0.15 a6.45 ± 0.28 a
30388 ± 31.49 b995 ± 77.89 b144 ± 17.33 b85 ± 5.86 a31.55 ± 1.35 b28.98 ± 2.47 b5.93 ± 0.17 b5.14 ± 0.25 b
60592 ± 32.52 c919 ± 60.36 b94 ± 2.41 b88 ± 4.19 a44.42 ± 2.44 c19.95 ± 1.07 bc6.09 ± 0.17 b4.95 ± 0.21 b
90786 ± 35.21 d756 ± 60.72 b88 ± 3.36 b84 ± 3.93 a61.73 ± 2.63 d14.90 ± 3.00 c5.60 ± 0.40 b4.62 ± 0.38 b
Naxos026 ± 2.09 a1376 ± 10.07 a253 ± 43.70 a96 ± 2.80 a7.72 ± 2.44 a31.44 ± 4.06 a6.67 ± 0.30 a5.18 ± 0.21 a
30418 ± 18.45 b1162 ± 25.48 b176 ± 24.39 ab96 ± 1.29 a42.74 ± 2.57 b23.13 ± 1.64 ab5.93 ± 0.25 a4.50 ± 0.14 a
60616 ± 30.70 c1055 ± 51.20 bc111 ± 3.19 b95 ± 4.51 a47.75 ± 3.89 b22.22 ± 1.50 ab5.50 ± 0.29 a4.51 ± 0.12 a
90881 ± 38.22 d991 ± 24.82 c98 ± 7.80 b105 ± 2.49 a66.26 ± 3.52 c17.59 ± 2.26 b4.69 ± 0.85 a3.38 ± 0.45 b
0 ***n.s.n.s.n.s.n.s. * *** **
Significance between the two30n.s.n.s.n.s.n.s. **n.s.n.s.n.s.
cultivars for the root ion composition60n.s.n.s. **n.s.n.s.n.s.n.s.n.s.
90n.s. *n.s. ***n.s.n.s.n.s.n.s.