stemlet

% Germination Mean Daily Germination Speed Germination Speed [t.sub.0] 97 a 14.17 a 13.85 a [t.sub.1] 94.3 a 13.65 b 13.46 b [t.sub.2] 89 b 11.28 c 12.7 c [t.sub.3] 60.3 c 6.83 d 8.6 d [t.sub.4] 42 d 3.87 e 5.9 e Seedling Rootlet Stemlet vigor length length index (cm) [t.sub.0] 24.9 a 15.5 a 10.1 a [t.sub.1] 21.1 b 15.4 b 6.7 b [t.sub.2] 11.09 c 9.6 c 2.7 c [t.sub.3] 3.6 d 4.5 d 1.1 d [t.sub.4] 0.99 e 1.1 e 0.3 e Rootlet Stemlet Root/ dry weight dry weight shoot (mg) ratio [t.sub.0] 0.68 a 0.99 a 1.54 e [t.sub.1] 0.57 b 0.72 b 2.41 d [t.sub.2] 0.41 c 0.37 c 4.03 b [t.sub.3] 0.24 d 0.14 d 4.49 a [t.sub.4] 0.06 e 0.01 e 3.81 c Table 3: Mean value of various trits of wheat doubled haploid genotypes under different stress levels tested at laboratory (Duncan).

The stemlets and rootlets of each treatment were separately placed under 75[degrees]C for 48 hours and then their dry weights were measured.

There was a significant difference between weeds in rootlet, stemlet and plantlet length in (Table 1).

Stemlet to rootlet ratio, cell membrane permeability and concentration of malondialdehyde: