| The effect of nitrogen stress on carbon invertase enzyme activities in tartary buckwheat seedling stage |
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| DOI：10.7606/j.issn.1000-7601.2019.04.18 |
| Key Words: tartary buckwheat low nitrogen seedling stage soil β-glucosidase sucrase cellulase |
| Author Name | Affiliation | | CHEN Wei | College of Geographical Sciences, Shanxi Normal University, Linfen, Shanxi 041000, China | | YANG Yang | College of Geographical Sciences, Shanxi Normal University, Linfen, Shanxi 041000, China | | CUI Ya-ru | College of Geographical Sciences, Shanxi Normal University, Linfen, Shanxi 041000, China | | SUN Cong-jian | College of Geographical Sciences, Shanxi Normal University, Linfen, Shanxi 041000, China | | ZHANG Yong-qing | College of Geographical Sciences, Shanxi Normal University, Linfen, Shanxi 041000, China
College of Life Sciences, Shanxi Normal University, Linfen, Shanxi 041000, China |
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| Abstract: |
| In order to investigate the carbon invertase enzymes activities under different nitrogen (N) tolerant tartary buckwheat to low N stress in seedling stage, using Diqing tartary buckwheat (low N tolerance, DQ) and Heifeng No. 1 (low N sensitive, HF) as materials. The study was carried out in a pot experiment to evaluate the different N treatments of no N (CK), low N (N1) and normal N (N2) as the treatments. The physicochemical properties and three carbon invertase activities of tartary buckwheat seedlings were measured. The results showed that: (1) DQ had species advantages under low N stress. Plant height, stem diameter, leaf area, soil organic carbon and available N were significantly higher than that of HF, while soil moisture content and pH were lower than that of HF. (2) Both N fertilizer treatments and cultivars had significant effects on the activities of carbon related enzymes involved in the transformation in tartary buckwheat growing soil. The activities of the monosaccharide hydrolase (β-glucosidase) and disaccharidease hydrolase (sucrose) in DQ were significantly higher than that of HF under low N treatment, the monosaccharide enzyme of DQ was 58.3% higher than that of HF, and the disaccharide enzyme was 3.3 times higher than that of HF. Under normal N treatment, both enzyme activities with DQ were 19.7% and 42.8% lower than that with HF, respectively. Under different N treatments, DQ secreted more polysaccharide enzymes (cellulase) and were 66%, 40% and 22% higher than HF under 3 N treatments, respectively. In summary, the varieties of tartary buckwheat with strong ability to tolerate low N can adapt to the low N growth environment by regulating the soil enzyme activities, and may change their preference for carbon sources in this way. |
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