Journal
SCIENTIFIC REPORTS
Volume 12, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41598-022-08971-x
Keywords
-
Categories
Funding
- China Agriculture Research System of MOF [CARS-21]
- Guangxi Innovation-Driven Development Project [GuiKe AA18242040]
- Guangxi Natural Science Foundation of China [2020GXNSFAA159025]
- China Agriculture Research System of MARA [CARS-21]
Ask authors/readers for more resources
Exogenous sucrose concentration has significant effects on the growth and metabolism of Andrographis paniculata plants. Moderate concentration of sucrose promotes plant growth, increases carbon supply and nitrogen uptake. However, high concentration of sucrose uncouples carbon and nitrogen metabolism, reduces nitrogen metabolism and induces plant senescence.
The effects of exogenous sucrose (Suc) concentrations (0, 0.5, 1, 5, 10 mmol L-1) on carbon (C) and nitrogen (N) metabolisms were investigated in a medicinal plant Andrographis paniculata (Chuanxinlian). Suc application with the concentration of 0.5-5 mmol L-1 significantly promoted plant growth. In contrast, 10 mmol L-1 Suc retarded plant growth and increased contents of anthocyanin and MDA and activity of SOD in comparison to 0.5-5 mmol L-1 Suc. Suc application increased contents of leaf soluble sugar, reducing sugar and trerhalose, as well as isocitrate dehydrogenase (ICDH) activity, increasing supply of C-skeleton for N assimilation. However, total leaf N was peaked at 1 mmol L-1 Suc, which was consistent with root activity, suggesting that exogenous Suc enhanced root N uptake. At 10 mmol L-1 Suc, total leaf N and activities of glutamine synthase (GS), glutamate synthase (GOGAT), NADH-dependent glutamate dehydrogenase (NADH-GDH) and glutamic-pyruvic transaminase (GPT) were strongly reduced but NH4+ concentration was significantly increased. The results revealed that exogenous Suc is an effective stimulant for A. paniculata plant growth. Low Suc concentration (e.g. 1 mmol L-1) increased supply of C-skeleton and promoted N uptake and assimilation in A. paniculata plant, whereas high Suc concentration (e.g. 10 mmol L-1) uncoupled C and N metabolisms, reduced N metabolism and induced plant senescence.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available