| Effects of the continuous salt stress on the growth of Capscium |
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| DOI：10.7606/j.issn.1000-7601.2016.05.06 |
| Key Words: continuous salt stress capscium growth indicator physiological index salt resistance |
| Author Name | Affiliation | | JI Xue-hua | Agricultural College, Shihezi University, Shihezi, Xinjiang 832003, China | | ZHENG Qun | Agricultural College, Shihezi University, Shihezi, Xinjiang 832003, China | | PANG Sheng-qun | Agricultural College, Shihezi University, Shihezi, Xinjiang 832003, China | | LI Ge | Agricultural College, Shihezi University, Shihezi, Xinjiang 832003, China |
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| Abstract: |
| Three dried pepper cultivars (Gailiangjiaxian, Chifengbanjiao, and Ribenjinta) were used in this paper to investigate the effects salt stress on the growth the pepper by employing continual NaHCO3 treatments at four concentrations during the budding period. During the treatment, growth indicators and physiological indexes were analyzed to determine the sensitivities of different varieties to alkaline salt. The results indicated that short-term salinity stresses by 30 mmol·L-1 and 60 mmol·L-1 NaHCO3 promoted the growth of Gailiangjiaxian and Ribenjinta. 30 mmol·L-1 NaHCO3 also promoted the chlorophyll content of Gailiangjiaxian and Ribenjinta. Under the 60 mmol·L-1 NaHCO3 stress, chlorophyll content of Gailiangjiaxianand Ribenjinta were not decreased significantly. However, under stress of low salt concentration, the growth and chlorophyll content of Chifengbanjiao became decreased. Under 90 mmol·L-1 NaHCO3 salinity stress, the growth and chlorophyll contents of three dried pepper varieties were all inhibited. MDA contents and membrane permeability of these three varieties became increased with the increase of stress level, which indicated the more serious the salt stress, the heavier damage the plasma membrane suffered. Chifengbanjiao accumulated more MDA than Gailiangjiaxian and Ribenjinta by the same salt concentration. Under salt stress, the proline content of stressed peppers leaf were higher than that of CK, and the accumulation of proline content was increased with the increase of salt stress intensity. Gailiangjiaxian and Ribenjintahad had stronger capacity in proline accumulation than Chifengbanjiao. After all, the results indicated that Gailiangjiaxian and Ribenjinta possessed higher tolerance to salt than Chifengbanjiao. |
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