Effects of Warming on Chlorophyll Degradation and Carbohydrate Accumulation of Alpine Herbaceous Species during Plant Senescence on the Tibetan Plateau
文献类型：期刊论文
| 作者 | Shi, Changguang ; Sun, Geng ; Zhang, Hongxuan ; Xiao, Bingxue ; Ze, Bai ; Zhang, Nannan ; Wu, Ning |
| 刊名 | PLOS ONE
 |
| 出版日期 | 2014 |
| 卷号 | 9期号:9页码:e107874(1-10) |
| 产权排序 | 1 |
| 通讯作者 | Sun, G (reprint author), Chinese Acad Sci, Chengdu Inst Biol, Key Lab Mt Ecol Restorat & Bioresource Utilizat, Chengdu, Peoples R China. |
| 合作状况 | 其它 |
| 英文摘要 | Plant senescence is a critical life history process accompanied by chlorophyll degradation and has large implications for nutrient resorption and carbohydrate storage. Although photoperiod governs much of seasonal leaf senescence in many plant species, temperature has also been shown to modulate this process. Therefore, we hypothesized that climate warming would significantly impact the length of the plant growing season and ultimate productivity. To test this assumption, we measured the effects of simulated autumn climate warming paradigms on four native herbaceous species that represent distinct life forms of alpine meadow plants on the Tibetan Plateau. Conditions were simulated in open-top chambers (OTCs) and the effects on the degradation of chlorophyll, nitrogen (N) concentration in leaves and culms, total non-structural carbohydrate (TNC) in roots, growth and phenology were assessed during one year following treatment. The results showed that climate warming in autumn changed the senescence process only for perennials by slowing chlorophyll degradation at the beginning of senescence and accelerating it in the following phases. Warming also increased root TNC storage as a result of higher N concentrations retained in leaves; however, this effect was species dependent and did not alter the growing and flowering phenology in the following seasons. Our results indicated that autumn warming increases carbohydrate accumulation, not only by enhancing activities of photosynthetic enzymes (a mechanism proposed in previous studies), but also by affecting chlorophyll degradation and preferential allocation of resources to different plant compartments. The different responses to warming can be explained by inherently different growth and phenology patterns observed among the studied species. The results implied that warming leads to changes in the competitive balance among life forms, an effect that can subsequently shift vegetation distribution and species composition in communities. |
| 学科主题 | Multidisciplinary Sciences |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2016-02-26 |
| 源URL | [http://210.75.237.14/handle/351003/26498]  |
| 专题 | 成都生物研究所_生态研究 |
| 推荐引用方式 GB/T 7714 | Shi, Changguang,Sun, Geng,Zhang, Hongxuan,et al. Effects of Warming on Chlorophyll Degradation and Carbohydrate Accumulation of Alpine Herbaceous Species during Plant Senescence on the Tibetan Plateau[J]. PLOS ONE,2014,9(9):e107874(1-10). |
| APA | Shi, Changguang.,Sun, Geng.,Zhang, Hongxuan.,Xiao, Bingxue.,Ze, Bai.,...&Wu, Ning.(2014).Effects of Warming on Chlorophyll Degradation and Carbohydrate Accumulation of Alpine Herbaceous Species during Plant Senescence on the Tibetan Plateau.PLOS ONE,9(9),e107874(1-10). |
| MLA | Shi, Changguang,et al."Effects of Warming on Chlorophyll Degradation and Carbohydrate Accumulation of Alpine Herbaceous Species during Plant Senescence on the Tibetan Plateau".PLOS ONE 9.9(2014):e107874(1-10). |
入库方式： OAI收割
来源：成都生物研究所
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