Carbon and nitrogen metabolism in arbuscular mycorrhizal maize plants under low-temperature stress; Carbon and nitrogen metabolism in arbuscular mycorrhizal maize plants under low-temperature stress | |
X. C. Zhu; F. B. Song; F. L. Liu; S. Q. Liu; C. J. Tian | |
刊名 | Crop & Pasture Science ; Crop & Pasture Science |
2015 ; 2015 | |
卷号 | 66期号:1页码:62-70 |
通讯作者 | 朱先灿 ; 朱先灿 |
中文摘要 | Effects of the arbuscular mycorrhizal (AM) fungus Glomus tortuosum on carbon (C) and nitrogen (N) metabolism of Zea mays L. grown under low-temperature stress was investigated. Maize plants inoculated or not inoculated with AM fungus were grown in a growth chamber at 25 degrees C for 4 weeks and subsequently subjected to two temperature treatments (15 degrees C, low temperature; 25 degrees C, ambient control) for 2 weeks. Low-temperature stress significantly decreased AM colonisation, plant height and biomass. Total N content and activities of glutamate oxaloacetate transaminase and glutamate pyruvate transaminase of AM plants were higher than those of non-AM plants. AM plants had a higher net photosynthetic rate (Pn) than non-AM plants, although low temperature inhibited the Pn. Compared with non-AM plants, AM plants exhibited higher leaf soluble sugars, reducing sugars, root sucrose and fructose contents, and sucrose phosphate synthase and amylase activities at low temperature. Moreover, low-temperature stress increased the C : Nratio in the leaves of maize plants, and AM colonisation decreased the root C : N ratio. These results suggested a difference in the C and N metabolism of maize plants at ambient and low temperature regimes. AM symbiosis modulated C metabolic enzymes, thereby inducing an accumulation of soluble sugars, which may have contributed to an increased tolerance to low temperature, and therefore higher Pn in maize plants.; Effects of the arbuscular mycorrhizal (AM) fungus Glomus tortuosum on carbon (C) and nitrogen (N) metabolism of Zea mays L. grown under low-temperature stress was investigated. Maize plants inoculated or not inoculated with AM fungus were grown in a growth chamber at 25 degrees C for 4 weeks and subsequently subjected to two temperature treatments (15 degrees C, low temperature; 25 degrees C, ambient control) for 2 weeks. Low-temperature stress significantly decreased AM colonisation, plant height and biomass. Total N content and activities of glutamate oxaloacetate transaminase and glutamate pyruvate transaminase of AM plants were higher than those of non-AM plants. AM plants had a higher net photosynthetic rate (Pn) than non-AM plants, although low temperature inhibited the Pn. Compared with non-AM plants, AM plants exhibited higher leaf soluble sugars, reducing sugars, root sucrose and fructose contents, and sucrose phosphate synthase and amylase activities at low temperature. Moreover, low-temperature stress increased the C : Nratio in the leaves of maize plants, and AM colonisation decreased the root C : N ratio. These results suggested a difference in the C and N metabolism of maize plants at ambient and low temperature regimes. AM symbiosis modulated C metabolic enzymes, thereby inducing an accumulation of soluble sugars, which may have contributed to an increased tolerance to low temperature, and therefore higher Pn in maize plants. |
WOS记录号 | WOS:000349077100006 |
内容类型 | 期刊论文 |
源URL | [http://159.226.123.10/handle/131322/6421] |
专题 | 东北地理与农业生态研究所_作物生理与栽培学科组_期刊论文 |
推荐引用方式 GB/T 7714 | X. C. Zhu,F. B. Song,F. L. Liu,et al. Carbon and nitrogen metabolism in arbuscular mycorrhizal maize plants under low-temperature stress, Carbon and nitrogen metabolism in arbuscular mycorrhizal maize plants under low-temperature stress[J]. Crop & Pasture Science, Crop & Pasture Science,2015, 2015,66, 66(1):62-70, 62-70. |
APA | X. C. Zhu,F. B. Song,F. L. Liu,S. Q. Liu,&C. J. Tian.(2015).Carbon and nitrogen metabolism in arbuscular mycorrhizal maize plants under low-temperature stress.Crop & Pasture Science,66(1),62-70. |
MLA | X. C. Zhu,et al."Carbon and nitrogen metabolism in arbuscular mycorrhizal maize plants under low-temperature stress".Crop & Pasture Science 66.1(2015):62-70. |
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