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Physiological and Biochemical Changes to Salt Stress in Hydropically Cultured Salix psammophila Seedlings(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2015年05
Page:
71-78
Research Field:
Publishing date:

Info

Title:
Physiological and Biochemical Changes to Salt Stress in Hydropically Cultured Salix psammophila Seedlings
Author(s):
YANG Jin1; YU Zhen-wen2; LI Zi-qin2; JIN Xing-zi3
（1.Science and Technology Park，Vocational and Technical College，Inner Mongolia Agricultural University，Baotou，Inner Mongolia 014109；2.Inner Mogolia Chifeng Hexigten Banner Center Complete Primary School，Chifeng，Inner Mongolia 024000；3.Gansu Province Tianshui Lyuyuanlong Agriculture Development Co.Ltd.，Tianshui，Gansu 741000）
Keywords:
morphological changes; enzyme solution macroscopic changes; enzyme activity; endogenous hormones
PACS:
-
DOI:
10.11937/bfyy.201505024
Abstract:
Taking  Salix psammophila seedlings as test materials，the effect of NaCl concentration (0 mM（CK），50 mM，100 mM and 150 mM) on morphological changes and the activities of SOD，CAT，POD，and endogenous hormone content of Salix psammophila seedlings were measured in this study.The results showed that the growth was strongly depressed by 100 mM or less NaCl concentration.Contents of ABA，IAA，GA3 were relatively stable.By measuring content of endogenous hormones,it was found that the Salix psammophila seedlings growth decreased under 100 mM NaCl salt stress，the impact of more than 100 mM NaCl concentration salt stress on Salix psammophila seedling was significant，the highest NaCl concentration that the cuttings could withstand was between 100 mM and 150 mM.Under 150 mM NaCl salt treatment，Salix psammophila seedlings between the first day and three days of metabolic disorders extent reached its limit of tolerable degree，the following days the plants gradually died.When the Salix psammophila seedlings at the brink of death，which did not increase significantly in ABA content，this was different from the common plants.The IAA，GA3 showed in a short time quickly reached maximum content，their contents were reduced in the next few days.Under high concentrations of NaCl stress，the SOD activity decreased rapidly in a short period of time，and later continued substantial increase，when Salix psammophila seedling died，the SOD activity reached the highest.When the Salix psammophila seedlings were stressed by NaCl，its CAT was more sensitive than SOD and POD，the CAT activity been affected more significantly.

References:

 

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Last Update: 2015-06-24