Homeostatic responses and growth of Leymus chinensis under incrementally increasing saline-alkali stress
文献类型：期刊论文
| 作者 | Li, Shujie1,2; Huang, Yujin1,3; Li, Yuefen1,2 |
| 刊名 | PEERJ
 |
| 出版日期 | 2021-03-01 |
| 卷号 | 9页码:15 |
| 关键词 | Saline-alkali stress Stoichiometric homeostasis Ecological stoichiometry Specific growth rate L. chinensis Nitrogen and phosphorus |
| ISSN号 | 2167-8359 |
| DOI | 10.7717/peerj.10768 |
| 通讯作者 | Li, Yuefen(yfli@jlu.edu.cn) |
| 英文摘要 | Despite considerable tolerance to salt and alkali stress, Leymus chinensis populations on the southwestern Songnen Plain in northern China are threatened by increasing soil salinity and alkalinity. To explore the species' responses to saline-alkali stress, we grew it in substrates with varying concentrations of nitrogen (N) and phosphorus (P) while applying varying levels of saline-alkali stress (increasing in 14-, 17- or 23-day intervals). We measured the plants' contents of N and P, and the N:P ratio, and calculated their homeostasis indices (HN, HP and HN:P) under each nutrient and saline-alkali stress treatment. The N content was found to be more sensitive to saline-alkali stress than the P content. The N and P contents were highest and the N:P ratio was stable at pH 8.4. At both pH 8.1 and 8.4, H-N:P > H-N > H-P, but the indices and their relations differed at other pH values. Exposure to saline-alkali stress for the 14-day incremental interval had weaker effects on the plants. Rapid changes in salinity-alkalinity weakened both the positive effects of the weakly alkaline conditions (pH 7.5-8.4) and the negative effects of more strongly alkaline conditions (pH 8.7 or 9.3) on L. chinensis. When L. chinensis plants lack N, applying N fertilizer will be extremely efficient. The optimal concentrations of N and P appeared to be 16 and 1.2 mmol/L, respectively. When the L. chinensis plants were N- and P-limited, the specific growth rate correlated positively with N:P, when limited by N it correlated positively with the environmental N concentration, and when limited by P it was weakly positively correlated with the environmental P concentration. |
| WOS关键词 | ECOLOGICAL STOICHIOMETRY ; BIOLOGICAL STOICHIOMETRY ; SOIL ; PATTERNS |
| 资助项目 | Science and Technology Strategy and Planning Research of Jilin Science and Technology Department[20200101119FG] |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000623548300003 |
| 出版者 | PEERJ INC |
| 资助机构 | Science and Technology Strategy and Planning Research of Jilin Science and Technology Department |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/160471]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Li, Yuefen |
| 作者单位 | 1.Jilin Univ, Coll Earth Sci, Changchun, Peoples R China 2.Minist Land & Resources, Key Lab Mineral Resources Evaluat Northeast Asia, Changchun, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Shujie,Huang, Yujin,Li, Yuefen. Homeostatic responses and growth of Leymus chinensis under incrementally increasing saline-alkali stress[J]. PEERJ,2021,9:15. |
| APA | Li, Shujie,Huang, Yujin,&Li, Yuefen.(2021).Homeostatic responses and growth of Leymus chinensis under incrementally increasing saline-alkali stress.PEERJ,9,15. |
| MLA | Li, Shujie,et al."Homeostatic responses and growth of Leymus chinensis under incrementally increasing saline-alkali stress".PEERJ 9(2021):15. |
入库方式： OAI收割
来源：地理科学与资源研究所
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