| Effects of three\|salt stress on the growth of maize seedlings and the accumulation of antioxidant enzymes and ions in leaves |
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| DOI：10.7606/j.issn.1000-7601.2020.03.15 |
| Key Words: salt stress maize seedling ion accumulation antioxidant enzyme activity |
| Author Name | Affiliation | | Shabeer Ahmed | Laboratory of Plant Cell Engineering, Southwest Sci. & Tech. University, Mianyang, Sichuan 621010, China
College of Environment and Resources, Southwest Sci. & Tech. University, Mianyang, Sichuan 621010, China | | SHEN Yanhe | Laboratory of Plant Cell Engineering, Southwest Sci. & Tech. University, Mianyang, Sichuan 621010, China | | MA wenhao | Laboratory of Plant Cell Engineering, Southwest Sci. & Tech. University, Mianyang, Sichuan 621010, China | | DONG Jiangbo | Laboratory of Plant Cell Engineering, Southwest Sci. & Tech. University, Mianyang, Sichuan 621010, China | | QU Xinyu | Laboratory of Plant Cell Engineering, Southwest Sci. & Tech. University, Mianyang, Sichuan 621010, China | | CAO Ying | Laboratory of Plant Cell Engineering, Southwest Sci. & Tech. University, Mianyang, Sichuan 621010, China | | HU Shanglian | Laboratory of Plant Cell Engineering, Southwest Sci. & Tech. University, Mianyang, Sichuan 621010, China | | LUO Xuegang | College of Environment and Resources, Southwest Sci. & Tech. University, Mianyang, Sichuan 621010, China |
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| Abstract: |
| In this study, two maize cultivars, Jinyu 819 and Jindan 999, were used. The effects of different salinities (NaCl, Na2SO4, and NaNO3) on the growth, biochemical and mineral contents (K+, Na+, and Ca2+) accumulation in maize seedlings were investigated. The results showed that three different types of Na+ stress led to the decrease of fresh weight of maize seedlings. The decrease in fresh weight was more than 28.6% for Jinyu 819 and more than 18% for Jindan 999. The SOD activity increased more than 2.1 times and the POD activity increased up to 4.5 times. The APX increased 2.1 times and the CAT increased 2.2 times. With Jindan 999 under the stress, the SOD activity increased up to 2.1 times, APX 1.6 times, and CAT 1.9 times. With both genotypes under the stress, Na+ content in leaves increased 4.5~6.3 times, K+/Na+ decreased 90%~93% compared with that of the control, while K+/ Na+ decreased 78%~82% under the treatment of Na2SO4, and Ca2+/Na+ of Jinyu 819 and Jin\|dan 999 decreased 85%~90% and 92%~94%, respectively, compared with the control. The comprehensive analysis showed that the secondary salt damage caused by NO-3 was harmful to maize production. And it was clear that Jinyu 819 was more sensitive than Jindan 999 to the salt stress. When treated with the same Na+ concentration, the fresh weight and SOD activity of Jinyu 819 significantly decreased and the ratio of K+/Na+ and Ca2+/Na+ were decreased. |
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