Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2020, Vol. 36 ›› Issue (32): 8-16.doi: 10.11924/j.issn.1000-6850.casb2020-0041

Special Issue: 生物技术 园艺

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The Physiological and Proteomics Analysis of Salt-resistance Sugar Beet Under Salt Stress

Wen Zhang1(), Geng Gui1, Wang Yuguang1, Sun Fei2, Wang Xiwei1, Yu Lihua1()   

  1. 1Key Laboratory of Sugar Beet Genetic Breeding of Heilongjiang Province/College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080
    2Hokkaido University, Sapporo Japan 060-0808
  • Received:2020-04-25 Revised:2020-06-09 Online:2020-11-15 Published:2020-11-19
  • Contact: Yu Lihua E-mail:1309592486@qq.com;32307812@qq.com

Abstract:

The aim is to explore the growth and proteomics difference of sugar beet under salt stress. In hydroponics indoor, the salt tolerant beet‘T510’was used as the experimental material, and the differences of physiological index and proteome of sugar beet were analyzed in the nutrition solution with 0, 140 and 280 mmol/L NaCl stress. The results showed that the dry matter, stress index and chlorophyll content significantly decreased along with the increase of salt concentration. In contrast, the content of malondialdehyde and soluble protein were significantly increased. A total of 514, 579 and 562 proteins were detected in the control, low salt treatment (140 mmol/L NaCl) and high salt treatment (280 mmol/L NaCl), respectively. There were 17, 40 and 21 significantly changed proteins (fold change > 2 and P value < 0.05) found between control vs. low salt treatment, control vs. high salt stress and low salt treatment vs. high salt treatment, respectively. By mass spectrometry, 12, 23 and 11 differential expression proteins were successfully identified. These proteins were mainly involved in photosynthesis and material metabolism. In addition, we found the abundance of PEPC, Zn-binding dehydrogenase family protein isoform 1 and ATP synthase gamma chain had a high level of fold change in response to salt stress. Therefore, for salt tolerant sugar beet, salt stress mainly affects the protein expression related to photosynthesis and material metabolism, in which PEPC, Zn binding dehydrogenase family protein subtype 1 and γ chain of ATPase play an important role. These results could present a theoretical basis for salt tolerance breeding of sugar beet and other crops.

Key words: salt stress, sugar beet, physiology and biochemistry, dimensional electrophoresis

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