The interaction between nonstructural carbohydrate reserves and xylem hydraulics in Korean pine trees across an altitudinal gradient
文献类型：期刊论文
| 作者 | Wang, Ai-Ying1,2; Han, Shi-Jie2,3; Zhang, Jun-Hui2; Wang, Miao2; Yin, Xiao-Han2; Fang, Li-Dong2; Yang, Da2; Hao, Guang-You2 |
| 刊名 | TREE PHYSIOLOGY
 |
| 出版日期 | 2018-12-01 |
| 卷号 | 38期号:12页码:1792-1804 |
| ISSN号 | 0829-318X |
| 关键词 | cavitation embolism freezing NSC winter embolism xylem |
| DOI | 10.1093/treephys/tpy119 |
| 英文摘要 | Nonstructural carbohydrates (NSC) have been proposed to play an important role in maintaining the hydraulic integrity of trees, particularly in environments with high risks of embolism formation, but knowledge about the interaction between NSC reserves and xylem hydraulics is still very limited. We studied the variation of NSC reserves and hydraulic traits in Pinus koraiensis Sieb. et Zucc. (Korean pine) in March and June across a relatively large altitudinal gradient in Changbai Mountain of Northeast China. One of the major aims was to investigate the potential role NSC plays in maintaining hydraulic integrity of overwintering stems in facing freezing-induced embolism. Consistent with our hypotheses, substantial variations in both NSC contents and hydraulic traits were observed across altitudes and between the two seasons. In March, when relatively high degrees of winter embolism exist, the percentage loss of conductivity (PLC) showed an exponential increase with altitude. Most notably, positive correlations between branch and trunk soluble sugar content and PLC (P = 0.053 and 0.006) were observed across altitudes during this period. These correlations could indicate that more soluble sugars are required for maintaining stem hydraulic integrity over the winter by resisting or refilling freezing-induced embolism in harsher environments, although more work is needed to establish a direct causal relationship between NSC dynamics and xylem hydraulics. If the correlation is indeed directly associated with varying demands for maintaining hydraulic integrity across environmental gradients, greater carbon demands may compromise tree growth under conditions of higher risk of winter embolism leading to a trade-off between competitiveness and stress resistance, which may be at least partially responsible for the lower dominance of Korean pine trees at higher altitudes. |
| 资助项目 | National Natural Science Foundation of China[41575153] ; National Natural Science Foundation of China[31722013] ; National Natural Science Foundation of China[31870593] ; National Natural Science Foundation of China[31500222] ; National Key Research and Development Program of China[2016YFA0600803] ; Hundred-Talents Program ; Chinese Academy of Sciences[QYZDJ-SSW-DQC027] |
| WOS研究方向 | Forestry |
| 语种 | 英语 |
| 出版者 | OXFORD UNIV PRESS |
| WOS记录号 | WOS:000454356800004 |
| 源URL | [http://210.72.129.5/handle/321005/123847]  |
| 专题 | 中国科学院沈阳应用生态研究所 |
| 通讯作者 | Han, Shi-Jie; Hao, Guang-You |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Appl Ecol, CAS Key Lab Forest Ecol & Management, Shenyang 110164, Liaoning, Peoples R China 3.Henan Univ, Sch Life Sci, Kaifeng 475004, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Ai-Ying,Han, Shi-Jie,Zhang, Jun-Hui,et al. The interaction between nonstructural carbohydrate reserves and xylem hydraulics in Korean pine trees across an altitudinal gradient[J]. TREE PHYSIOLOGY,2018,38(12):1792-1804. |
| APA | Wang, Ai-Ying.,Han, Shi-Jie.,Zhang, Jun-Hui.,Wang, Miao.,Yin, Xiao-Han.,...&Hao, Guang-You.(2018).The interaction between nonstructural carbohydrate reserves and xylem hydraulics in Korean pine trees across an altitudinal gradient.TREE PHYSIOLOGY,38(12),1792-1804. |
| MLA | Wang, Ai-Ying,et al."The interaction between nonstructural carbohydrate reserves and xylem hydraulics in Korean pine trees across an altitudinal gradient".TREE PHYSIOLOGY 38.12(2018):1792-1804. |
入库方式： OAI收割
来源：沈阳应用生态研究所
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