Effects of NaCl stress on cation contents in different pumplin cultivars' seedlings

Wei Xin Li, Gui Lin Chen, Liang Yu Ren, Peng Wang

Research output: Contribution to journalArticlepeer-review


With the seedlings of 19 pumpkin cultivars as test materials, this paper studied ihe variations of Na+, K+, Ca2+, Na+/K+, Na+/Ca2+, SNa+,K+ and S Na+,Ca2+ in their shoots and roots under the stress of 300 mmol NaCl · L-1. The results showed that after an 8-day exposure to 300 mmol NaCl · L-1, the Na+ content in the seedlings increased significantly while the K+ content decreased, resulting in the brokenness of ion balance. The root Na+ content, shoot Na+/ K+ and Na+/Ca2+ ratios, and SNa+,K+ and SNa+,Ca2+ of Cucurbita moschata (Q1) were significantly higher than those of C. maxima (H2) and C. ficifolia (H3). The variation tendency of these parameters of different pumpkin cultivars' seedlings were nearly consistent with the salt injury index of the seedlings under NaCl stress, which further proved that the strong salt-tolerance of Q1 was related to the lower values of shoot Na+/K++, Na+/Ca2+, SNa+,K+ and SNa+,Ca2+, and the high contents of K+ and Ca2+, while the salt-sensitivity of H2 and H3 was related to the higher values of shoot Na+/K+, Na+/Ca2+, SNa+,K+ and SNa+,Ca2+, and low contents of K+ and Ca2+ under NaCl stress.

Original languageEnglish
Pages (from-to)569-574
Number of pages6
JournalChinese Journal of Applied Ecology
Issue number3
StatePublished - Mar 2008
Externally publishedYes


  • Ion
  • Na/Ca
  • Na/K
  • NaCl stress
  • Pumpkin


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