| Physiology response of roots of pakchoi varieties to salt stress |
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| DOI：10.7606/j.issn.1000-7601.2017.03.28 |
| Key Words: pakchoi salt-resistance root growth physiology response |
| Author Name | Affiliation | | XU Fen-fen | Life Science College, Shangrao Normal University, Shangrao, Jiangxi 334001, China | | YE Li-min | Life Science College, Shangrao Normal University, Shangrao, Jiangxi 334001, China | | XIA Xiao-lei | Life Science College, Shangrao Normal University, Shangrao, Jiangxi 334001, China |
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| Abstract: |
| With pakchoi varieties, i.e. a salt-resistance variety ‘tetraploid Aijiaohuang’ and a salt-sensitive variety ‘Improvement 605’, as the experimental materials, this study were carried out to investigate and report the response of root morphology, root cell membrane damage, root osmotic adjustment substance content and its scavenging system of reactive oxygen under the different salt tolerance hydroponic solution. The results showed that the root length, number of branches roots and root hair diameter of the ‘tetraploid Aijiaohuang’ under salt stress was decreased by 0.71 cm, 0.6 number·plant-1, 0.28 mm and 2.5 μm, respectively. But the root hair density was increased by 3 number·mm-1 compared with that of CK. The root hair length decreased significantly while other indexes did not changed markedly. In addition, ‘Improvment 605’ had no new hairs and branch roots under the salt stress. Physiological analysis showed increase in proline content, soluble sugar content, the relative conductivity Na+/K+ ratio, and reactive oxygen accumulation, whereas revealed decrease in protecting enzyme activity for both varieties. And the variation of physiological indexes were lower for the salt-sensitive variety ‘Improvement 605’ than the tolerant variety ‘tetraploid Aijiaohuang’. |
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