NaCl胁迫对甘薯植株体内K^+、Na^+和Cl^-含量及生长的影响

Effect of Na Cl Stress on the Content of K^+,Na^+and Cl^- and the Growth of Sweet Potato Plants

研究Na Cl处理下耐盐性不同基因型甘薯植株K^+、Na^+和Cl^-含量及生长情况,以探讨不同器官K^+、Na^+和Cl^-含量变化对植株生长的影响,为耐盐材料的鉴定及耐盐机理的研究提供依据。以商薯19(CK)和EMS诱变创新材料T06、T11为试验材料,分析Na Cl胁迫处理下,甘薯植株根、茎、叶K^+、Na^+和Cl^-含量变化及其与生长的关系。随着Na Cl处理时间的延长,CK、T06、T11根、茎、叶干重的增长速率和K^+/Na^+值均降低,Na^+、K^+、和Cl^-含量逐渐增加,但是T06和T11较CK保持较高的干重增长速率、K^+含量、K^+/Na^+值,较低的Na^+和Cl^-含量;甘薯植株干重与Na^+和Cl^-含量呈显著或极显著负相关,而与K^+含量呈显著正相关。因此,耐盐性好的甘薯基因型,在Na Cl处理后可保持较高的生长速率,根、茎、叶较低的Na^+和Cl^-含量,较高的K^+/Na^+值和K^+含量,可为耐盐材料的鉴定提供借鉴。

This paper investigated the contents of K＋ , Na＋ and Cl- and growth status of sweet potato plant with different gene type under NaCl treatment, so as to discuss the effect of K＋, Na＋ and Cl content changes in different organs on plant growth and provide basis for identification of salt tolerant materials and studies on salt tolerant mechanism. Taking Shangshul9 as CK, TO6 and T11 mutation by EMS as material, this experiment analyzed the K＋ ,Na＋ and Cl- contents changes in sweet potato root, stem and leaves under NaCl stress and their relation with sweet potato plant growth. The results showed that with the NaCl treatment time prolonging, the dry weight and the ratio of K＋/Na＋ of root, stem and leaf in all materials were decreased, while the content of Na＋ ,K＋ ,Cl-was gradually increased. But T06 and T11 kept the higher dry weight increasing rate and K＋ content and K＋ ,Na＋ value, and lower Na＋ and Cl-content than that of the CK. There were nagatively significant and extreme significant correlation between the content of Na＋ and Cl- in plant, while the correlation with K＋ content was significant positively. So the NaCl treatment could keep higher plant growth rate,lower Cl- and Na＋ contents, higher K＋/Na＋ value. These indicators could provide reference for salt tolerance identification.