| Na+ accumulation characteristics in a hybrid sweet sorghum variety |
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| DOI：10.7606/j.issn.1000-7601.2021.05.07 |
| Key Words: NaCl stress hybrid sweet sorghum Na+ concentration Na+ uptake biomass |
| Author Name | Affiliation | | JIANG Bo | Institute of Physical Science and Information Technology, Anhui University, Hefei, Anhui 230039, China
Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China | | WANG Qi | Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China | | LI Wenjian | Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China | | WU Yuejin | Institute of Physical Science and Information Technology, Anhui University, Hefei, Anhui 230039, China
Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China | | DONG Xicun | Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China | | YANG Yang | Institute of Physical Science and Information Technology, Anhui University, Hefei, Anhui 230039, China
Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China |
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| Abstract: |
| In this study, sweet sorghum varieties ‘BJ0603’ (a hybrid) and ‘623B’ (the control) were used as test crops, and different salt stress treatments were set under pot and field conditions during 2020 to analyze the Na+ accumulation characteristics in the sweet sorghum varieties. The results showed that, as salt stress increased from 0.9 g·kg-1 to 6.9 g·kg-1, the plant Na+ concentration in ‘623B’ increased from 0.395 g·kg-1 to 1.104 g·kg-1, while the plant Na+ concentration in ‘BJ0603’ increased from 0.321 g·kg-1 to 0.759 g·kg-1. Under the same salt stress level, the plant Na+ concentration in ‘BJ0603’ was 4.1%~44.5% which was lower than that in ‘623B’. The biomass of ‘BJ0603’ was 73.5%~193.8% higher than that of ‘623B’ (P<0.05). Under different salt stresses, the root Na+ concentrations in ‘BJ0603’ were 46.9%~346.2%, 104.3%~461.3%, and 51.6%~156.3% higher than the leaf, leaf sheath, and stem Na+ concentrations, respectively. Compared with non\|stress (0.9 g·kg-1), light salt stress (1.5 g·kg-1) increased the biomass of ‘623B’ and ‘BJ0603’ by 38.0% and 24.5%, respectively (P<0.05). Further increasing in salt stress (to 6.9 g·kg-1) reduced the biomass of ‘623B’ and ‘BJ0603’ by 56.1% and 31.0%, respectively. As the salt stress levels increased, the root dry matter mass of ‘623B’ gradually decreased from 22.67 g·plant-1 to 9.26 g·plant-1, while that of ‘BJ0603’ showed no significant decline. Under salt stress, hybrid sweet sorghum variety ‘BJ0603’ had higher biomass and Na+ enrichment capacity, and thus it was suitable for popularization in salinized areas and promoting the bioremediation of saline soils. |
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