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通过种子萌发试验和盆栽试验,探讨了盐胁迫对黄蜀葵种子发芽、生长发育、植株体内离子分布以及金丝桃苷含量的影响。结果表明,盐胁迫对黄蜀葵种子萌发有一定的抑制作用,随着盐浓度的增加,其发芽率呈下降趋势;低浓度NaCl胁迫有利于黄蜀葵生长,其中,0.3%的NaCl处理下生长发育较好;盐处理后,黄蜀葵根中Na+和K+含量显著高于茎与叶,Ca2+含量、K+/Na+和Ca2+/Na+值显著低于茎与叶;随NaCl浓度提高,根中Na+含量逐渐增加,各个器官中Ca2+和K+含量均呈上升趋势。盐胁迫对黄蜀葵花冠中金丝桃苷含量影响显著,当NaCl浓度为0.3%时,金丝桃苷含量达到最高,但当NaCl浓度为0.7%时,金丝桃苷含量急剧下降。认为黄蜀葵为耐盐植物,适度的盐胁迫可以提高黄蜀葵花冠中金丝桃苷的含量。
The effects of salt stress on seed germination, growth and development, ion distribution in plant and the content of hyperoside of salvia were studied by seed germination test and pot experiment. The results showed that salt stress inhibited the seed germination of hollyhock, and its germination rate decreased with the increase of salt concentration. Low NaCl stress was beneficial to the growth of hollyhock, of which 0.3% NaCl had better growth and development ; After salt treatment, the contents of Na + and K + in roots of S. salsa were significantly higher than those in stems and leaves, and the contents of Ca2 +, K + / Na + and Ca2 + / Na + were significantly lower than those in stems and leaves. With the increase of NaCl concentration, Na + The content of Ca2 + and K + in organs showed an upward trend. Under salt stress, the content of hyperoside in corolla was significantly affected. When the concentration of NaCl was 0.3%, the content of hyperoside reached the highest, but the content of hyperoside decreased sharply when the concentration of NaCl was 0.7%. The yellow hollyhock is considered as a salt-tolerant plant, and moderate salt stress can increase the content of hyperoside in the hollyhock corolla.