Effect of NaCl Stress on Physiological Responses and Anatomical Structure of Salix spp. Seedlings
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    Abstract:

    In order to understand the effects of NaCl stress on the seedling growth of Salix spp., the survival rate, physiological response and anatomical structure of half-year-old Salix spp. seedlings were studied under salt stress by pot-culture method. The results showed that the growth of seedlings was well treated with 0.25% NaCl (light salt stress), while it was inhibited treated with more than 0.5% NaCl (moderate and severe salt stress). It was deduced that the salt tolerant threshold of Salix spp. was 0.5%. The relative water content, the content of Chl a, Chl a+b and Chl a/b decreased as salt stress enhanced, while the Chl b, proline and malondialdehyde (MDA) contents increased gradually. The activity of superoxide dismutase (SOD) and soluble protein content increased under light salt stress, but significantly declined under moderate and severe salt stress. The thickness, cuticle, palisade tissue of leaf and the diameter and periderm of root were the biggest treated with 0.25% NaCl, while under moderate salt stress, the cell length in palisade tissue of leaf decreased with loose arrangement and the cells in transfusion tissue of root was abnormal. Therefore, it was suggested that Salix spp. had tolerance to light salt stress, and undergrowth at moderate and severe salt stress.

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洪文君,申长青,庄雪影,黄久香.盐胁迫对竹柳幼苗生理响应及结构解剖的研究[J].热带亚热带植物学报,2017,25(5):489~496

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  • Received:March 23,2017
  • Revised:May 12,2017
  • Online: September 12,2017
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