Linking root respiration to chemistry and morphology across species
Linking root respiration to chemistry and morphology across species
复制标题
将根呼吸与跨物种的化学和形态联系起来
DOI：
10.1111/gcb.15391
复制
发表时间：
2020-10-28
影响因子：
11.6
通讯作者：
Zhu, Biao
中科院分区：
文献类型：
--
作者：
Han, Mengguang;Zhu, Biao
根系呼吸是影响根系资源获取策略的重要生理特性，但在根系性状综合征中的表现较少。在这里，我们编制了一个大型数据集的根呼吸与根化学和形态性状从245种植物。我们的研究结果表明，根呼吸与根氮浓度（RNC）呈正相关，与根组织密度（RTD）呈负相关。而根系呼吸与比根长和比根粗的相关性较弱甚至不显著。这种根系呼吸性状的关系并不完全符合根经济谱（RES）的预测。主成分分析表明，根性状综合征是多维度的。木本植物根呼吸与RNC-RTD轴（经典RES）的相关性比与正交SRL-RD轴的相关性更强，但非木本植物则不然。总的来说，根的生理，化学和形态性状的联系提供了更好地理解根性状的协变和根资源的获取策略。
Root respiration is a critical physiological trait involved in root resource acquisition strategies, yet it is less represented in root trait syndrome. Here we compiled a large dataset of root respiration associated with root chemical and morphological traits from 245 plant species. Our results demonstrated that root respiration correlated positively with root nitrogen concentration (RNC) and negatively with root tissue density (RTD) across and within woody and non‐woody species. However, the relationships between root respiration and specific root length (SRL) and root diameter (RD) were weak or even insignificant. Such root respiration–traits relationships were not completely in line with predictions by the root economics spectrum (RES). Furthermore, the principal component analysis showed that root trait syndrome was multidimensional. Root respiration was associated more strongly with the RNC‐RTD axis (the classical RES) than with the orthogonal SRL‐RD axis for woody species, but not for non‐woody species. Collectively, the linkages of root physiological, chemical, and morphological traits provide a better understanding of root trait covariation and root resource acquisition strategies.