Effects of Leymus racemosus Chromosome to the Salt Tolerance of Common Wheat Seed

HU Wen-hua;ZHANG Ya-li;WANG Lin-sheng;College of Agriculture,Hena University of Science & Technology;

Triticum aestivum;;Leymus racemosus;;alien addition line;;NaCl stress;;seed germination;;seedlings growth

The effects of NaCl stress on seed germination and seedlings growth were studied,using Chinese Spring, Triticum aestivum-Leymus racemosus heterochromosome lines such as DA5 Lr,DA7Lr,AddLr11″,AddLr2″,DA7Lr#1S and DA5Lr#1L as materials. Results showed that germination rate,germination potential,germination index, activity index,bud length, per plant fresh weight, per plant dry weight and relative growth rate of coleoptile were inhibited,and The inhibitory degree of DA7 Lr is obviously lower than other materials. Under salt stress by 100 mmol/L NaCl, The decline rate of germination rate,germination potential,germination index, activity index and bud length of DA7 Lr seed was 22.92%,16.28%,57.38%,69.39% and 25.54%respectively,and compared to Chinese Spring, these decline rate declined 32.64,49.78,23.25,4.31 and 10.66 percentage points, respectively. Under salt stress after 48 h, the relative growth rate of coleoptile was 0.267 mm/h,and the increasing rate of that compared to Chinese Spring was 117.1%. Under salt stress after 9d, per plant fresh weight and per plant dry weight of DA7 Lr was 76.4mg and 10.6mg respectively, the increasing rate of that compared to Chinese Spring was 7.1% and 82.8%rspectively. DA7 Lr have high salt tolerance characters of seedlings.