| Response of seedling growth and physiological characteristics of quinoa germplasm to saline\|alkali stress and evaluation of saline\|alkali tolerance |
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| DOI：10.7606/j.issn.1000-7601.2023.06.03 |
| Key Words: quinoa, saline\|alkali stress, physiological characteristic, saline\|alkali tolerance |
| Author Name | Affiliation | | LIU Ruimin | College of life science and technology, Gansu Agricultural University, Lanzhou, Gansu 730070, China
Key Laboratory of Crop Science in arid habitat of Gansu Province, Lanzhou, Gansu 730070, China | | MA Xuejun | Institute of livestock grass and green agriculture, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China
Chenopodium album breeding and cultivation technology and comprehensive development Engineering Research Center, Lanzhou, Gansu 730070, China | | LIU Wenyu | Institute of livestock grass and green agriculture, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China
Chenopodium album breeding and cultivation technology and comprehensive development Engineering Research Center, Lanzhou, Gansu 730070, China | | WANG Wangtian | College of life science and technology, Gansu Agricultural University, Lanzhou, Gansu 730070, China
Key Laboratory of Crop Science in arid habitat of Gansu Province, Lanzhou, Gansu 730070, China | | YANG Farong | Institute of livestock grass and green agriculture, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China
Chenopodium album breeding and cultivation technology and comprehensive development Engineering Research Center, Lanzhou, Gansu 730070, China | | HUANG Jie | Institute of livestock grass and green agriculture, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China
Chenopodium album breeding and cultivation technology and comprehensive development Engineering Research Center, Lanzhou, Gansu 730070, China | | WEI Yuming | Institute of livestock grass and green agriculture, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China
Chenopodium album breeding and cultivation technology and comprehensive development Engineering Research Center, Lanzhou, Gansu 730070, China |
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| Abstract: |
| Taking quinoa as the research object, potted seedling rearing method was used, and 3 mixed salt and alkali (NaCl∶NaHCO3=1∶1) concentrations were set at 0 (CK), 150 and 300 mmol·L-1. The effects of saline\|alkali stress on the growth and physiological characteristics of quinoa germplasm seedlings were studied by measuring fresh weight, dry weight, leaf chlorophyll, soluble sugar, proline, malondialdehyde content and antioxidant enzyme activity. The results showed that the plant height and root length of Q1 increased by 3 cm from 150 mmol·L-1 to 300 mmol·L-1, while the fresh weight decreased by 0.19 g from 300 mmol·L-1 to 150 mmol·L-1 compared with the control. The content of Q6 in leaf chlorophyll increased from 2.7 mg·g-1 at 150 mmol·L-1 to 4 mg·g-1 and decreased to 2 mg·g-1 at 300 mmol·L-1. The soluble sugar of Q1 increased from 30.8 mg·g-1 to 37.59 mg·g-1 at 150 mmol·L-1 for CK and 89.84 mg·g-1 at 300 mmol·L-1. The soluble protein content of Q1 increased from 30.87 mg·g-1 for CK to 37.59 mg·g-1 for 150 mmol·L-1 and reached a maximum of 89.84 mg·g-1 when the concentration was 300 mmol·L-1. The content of proline in leaves of quinoa seedlings was significantly higher than that of the control under all salt and alkali treatments, and Q7 increased from 95.12 μg·g-1 for CK to 216.17 μg·g-1 for 300 mmol·L-1 . There was no significant difference in malondialdehyde content between quinoa seedlings and the control when the salt and alkali concentration was 150 mmol·L-1. The superoxide dismutase activity of Q1 increased from 4.76 U·g-1 in CK to 5.94 U·g-1 and then decreased to 4.91 U·g-1, and the peroxidase activity increased from 0.13 U·g-1 in CK to 3.66 U·g-1. Catalase activity increased from 2.13 U·g-1 to 3.36 U·g-1 at 300 mmol·L-1 and then decreased to 2.5 U·g-1 at 300 mmol·L-1. With the increase of concentration, the overall concentration showed a trend of first increasing and then decreasing. Based on the comprehensive evaluation, HZLM-15-1 was the most salt\|alkali resistant material, followed by HJL-33-1, and HJL34-1 and LZLM-4 were the most salt\|alkali sensitive materials. |
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