Effects of Pb Stress on Seed Germination and Seedling Growth of Durum Wheat
The effects of Pb stress on seed germination and seedling growth of durum wheat were studied with zhongyin 1320 as material .The results showed that the seed germination and seedling growth of durum wheat were promoted by lower concentration of Pb and inhibited by higher concentration of Pb .For example , the germination rate,germination potential,germination index,coleoptile length, bud length,root length,fresh weight and dry weight of seedlings were promoted by 50 mg/L Pb2+,and the vigor index was sensitive to Pb stress .The germination rate ,germination potential ,coleoptile length ,bud length , root length ,vigor index , fresh weight and dry weight of seedlings were obviously inhibited by 200 mg/L Pb2+, while the germination index increased to some extent .The inhibition of Pb stress on root was bigger than that on bud .
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