›› 2019, Vol. 31 ›› Issue (9): 1531-1540.DOI: 10.3969/j.issn.1004-1524.2019.09.18

• Environmental Science • Previous Articles     Next Articles

Evaluation of salt and alkali resistance of Pennisetum giganteum Z. X. Lin seedlings based on principal component analysis and membership function method

YAN Jingqiuzi1, LI Gangtie1,*, LIU Yujun2, MA Yunxia1, YANG Ying1   

  1. 1. College of Desert Control Science and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China;
    2. Xinglongzhao Forest Farm, Naimanqi Forestry Bureau of Tongliao City, Tongliao 028300, China
  • Received:2019-04-01 Online:2019-09-25 Published:2019-10-11

Abstract: The plant height increase (H), water content (MC), relative water content (RWC), water saturation deficit (WSD), malondialdehyde content (MDA), catalase activity (CAT), superoxide dismutase activity (SOD), soluble sugar content (SS), free proline content (Pro), soluble protein content (SP), chlorophyll content (Chl) (including chlorophyll a content Chla, and chlorophyll b content Chlb) of Pennisetum giganteum Z. X. Lin seedlings were determined under simulated saline-alkali stress, and comprehensive evaluation of saline-alkali resistance was also carried out. It was shown that with the increase of saline-alkali concentration, H, RWC decreased, while the activities of CAT, SOD, and contents of SS, SP, Pro varied differently. When the concentration of test solution was 30 mmol·L-1, and the ratio of NaCl, Na2SO4, NaHCO3 concentration was 1:2:1, the comprehensive score of membership function was the highest (0.893), indicating good tolerance of Pennisetum giganteum Z. X. Lin under this simulated environment.

Key words: Pennisetum giganteum Z. X. Lin, salt tolerance of seedlings, principal component analysis, membership function

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