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天然型藜麦品种抗盐碱生理特性比较研究
许斌1, 牛娜1, 赵文瑜1, 缪建2, 赵耕毛*1
1.南京农业大学资源与环境科学学院;2.南通穗邦农业科技发展有限公司
摘要:
本文以天然型黑色和黄色藜麦品种为试验材料,研究了盐碱度对两藜麦品种生长、抗氧化系统和无机渗透调节离子的影响,解析了不同藜麦品种对盐碱胁迫的耐受能力。结果表明:盐碱胁迫促进了两藜麦品种根系的生长,但明显抑制了茎叶生长,抑制程度:黑色藜麦品种>黄色藜麦品种。高浓度处理下,黄色藜麦品种过氧化氢酶(CAT)活性急剧升高,且不同处理下总抗氧化能力(T-AOC)均高于黑色藜麦,表明黄色藜麦品种具有更强的清除活性氧能力。盐碱处理前后离子选择吸收参数K+/Na+ 有明显差异,处理前黑色藜麦K+/Na+ 高于黄色藜麦,处理后K+/Na+差异逐渐缩小;在高浓度处理下,黄色藜麦K+/Na+ 显著高于黑色藜麦。由此可见,黄色藜麦耐盐碱能力强于黑色藜麦品种,更适合在滨海盐碱地种植。
关键词:  藜麦幼苗  盐碱胁迫  生长  抗氧化系统  离子吸收
DOI:10.13758/j.cnki.tr.2020.01.012
分类号:Q945
基金项目:国家自然科学基金项目(31370422,31400464)、江苏省重点研发计划项目(BE2017337)和江苏省农业科技自主创新资金项目(CX(17)—1001)资助。
Comparative Study on Physiological Characteristics of Natural Quinoa Varieties Against Salt-Alkali Stress
Xu Bin1, Niu Na1, Zhao Wenyu1, MIAO Jian2, Zhao Gengmao1
1.College of Resources and Environment Sciences,Nanjing Agricultural University;2.Nantong SuiBang Agricultural Science and Technology Development Co,Ltd
Abstract:
Natural black and yellow quinoa varieties were used as experimental materials to study the effects of different salinity and alkalinity concentrations on the growth, antioxidant system and osmotic ion adjustment, the aim of which is to compare the tolerance of natural quinoa varieties to salt-alkali stress. The results showed that Salt-alkali stress promoted the root growth of two quinoa cultivars, but significantly inhibited the growth of stems and leaves, and the inhibitory effect exhibited higher for the black quinoa variety than for the yellow one. The CAT activity of the yellow quinoa variety increased damatically under high Salt-alkali concentration treatment, and its total antioxidant capacities (T-AOC) under different treatments were much higher than those of the black one, showing stronger scavenging ability of reactive oxygen of yellow quinoa variety. The ion selective absorption ratio (K+/Na+) were significantly different between before and after salt-alkali treatment. Before salt-alkali treatment, K+/Na+ of the black quinoa was higher than that of the yellow one; while after salt-alkali treatment, the K+/Na+ of the difference between the two quinoa varieties was gradually narrowed. Totally, K+/Na+ of the yellow quinoa variety was significantly higher than that of the black one under the high salt-alkali treatments, indicating the former was more resistant to salt-alkali stress than the latter. In conclusion, yellow quinoa is more salt-resistant and more suitable for cultivating in coastal salt-alkali soils.
Key words:  Quinoa seedlings  Salt-alkali stress  Growth  Antioxidant system  Ion absorption

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