Distinct Carbon and Nitrogen Metabolism of Two Contrasting Poplar Species in Response to Different N Supply Levels
AbstractPoplars have evolved various strategies to optimize acclimation responses to environmental conditions. However, how poplars balance growth and nitrogen deficiency remains to be elucidated. In the present study, changes in root development, carbon and nitrogen physiology, and the transcript abundance of associated genes were investigated in slow-growing Populus simonii (Ps) and fast-growing Populus euramericana (Pe) saplings treated with low, medium, and high nitrogen supply. The slow-growing Ps showed a flourishing system, higher δ15N, accelerated C export, lower N uptake and assimilation, and less sensitive transcriptional regulation in response to low N supply. The slow-growing Ps also had greater resistance to N deficiency due to the transport of photosynthate to the roots and the stimulation of root development, which allows survival. To support its rapid metabolism and growth, compared with the slow-growing Ps, the fast-growing Pe showed greater root development, C/N uptake and assimilation capacity, and more responsive transcriptional regulation with greater N supply. These data suggest that poplars can differentially manage C/N metabolism and photosynthate allocation under different N supply conditions. View Full-Text
- Supplementary File 1:
PDF-Document (PDF, 1208 KB)
Share & Cite This Article
Meng, S.; Wang, S.; Quan, J.; Su, W.; Lian, C.; Wang, D.; Xia, X.; Yin, W. Distinct Carbon and Nitrogen Metabolism of Two Contrasting Poplar Species in Response to Different N Supply Levels. Int. J. Mol. Sci. 2018, 19, 2302.
Meng S, Wang S, Quan J, Su W, Lian C, Wang D, Xia X, Yin W. Distinct Carbon and Nitrogen Metabolism of Two Contrasting Poplar Species in Response to Different N Supply Levels. International Journal of Molecular Sciences. 2018; 19(8):2302.Chicago/Turabian Style
Meng, Sen; Wang, Shu; Quan, Jine; Su, Wanlong; Lian, Conglong; Wang, Dongli; Xia, Xinli; Yin, Weilun. 2018. "Distinct Carbon and Nitrogen Metabolism of Two Contrasting Poplar Species in Response to Different N Supply Levels." Int. J. Mol. Sci. 19, no. 8: 2302.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.