Table 4: Influence of salinity stress on water relation and biochemical parameters of grape rootstocks during various stages of stress cycle.

Rootstocks/salinity levels5th day15th day25th day
OP
(MPa)
WP
(Mpa)
Red sugar
(mg g−1)
Proteins
(mg g−1)
Phenols
(mg g−1)
OP
(MPa)
WP
(Mpa)
Red sugar
(mg g−1)
Proteins
(mg g−1)
Phenols
(mg g−1)
OP
(MPa)
WP
(Mpa)
Red sugar
(mg g−1)
Proteins
(mg g−1)
Phenols
(mg g−1)

Salinity levels

2 dS m−10.8861.085112.67122.497.440.6390.950106.45118.5010.060.6540.743127.47155.9510.927
4 dS m−10.8361.038136.18126.167.150.6710.960110.01111.208.640.6430.874131.50185.549.626

Level of significance*0.00230.4079<0.00010.65610.34630.0030.8280.3700.089<0.00010.3770.110<0.0001<0.0001<0.0001

Rootstocks

1103P0.881.20114.29136.287.350.620.9286.67123.3112.340.690.908133.37173.3611.00
110R0.931.17173.08154.268.070.711.08140.89132.3610.770.670.753133.67235.9912.85
1613C0.791.0493.7597.045.890.650.86111.0587.976.540.621.038100.76146.638.97
99R0.870.98132.99147.519.840.641.03118.69130.3511.370.690.65699.50190.579.20
B2-560.910.98139.38144.307.410.680.87108.75113.548.610.640.500109.84153.6910.68
Dogridge0.871.05102.6095.075.940.601.03106.25123.038.20.590.77676.42135.527.54
Salt Creek0.721.0389.7585.094.970.640.83104.3792.477.090.630.92895.96138.088.86
Teleki 5A0.811.00123.76134.386.860.641.0388.1888.856.700.630.920117.70152.8410.24
V. longii 0.911.07150.24124.869.340.690.90109.23141.7412.590.640.811125.67210.1413.10

Level of significance*<0.0001<0.0001<0.00010.0009<0.00010.00020.106<0.0001<0.0001<0.00010.00580.1200.0016<0.0001<0.0001

Interaction effect (rootstock × salinity)

Level of significance*<0.00010.2656<0.00010.00260.00240.00020.0018<0.00010.0004<0.00010.03600.2414<0.0001<0.0001<0.0001

Values below 0.05 indicate significance at . OP: osmotic potential; WP: water potential.