Variations in water use efficiency and carbon and nitrogen concentrations in red heart Chinese fir

IF 4.2 3区 生物学 Q1 PLANT SCIENCES Plant Biology Pub Date : 2024-07-16 DOI:10.1111/plb.13694
R. You, Y. Liu, X. Deng, Y. Hu, S. Ouyang, L. Chen, W. Xiang, H. He
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红心冷杉水分利用效率和碳氮浓度的变化。
温度会对红心杉的生长产生重要影响(P i)。红心冷杉(Cunninghamia lanceolata)是中国最重要的生态和经济种植树种之一。然而,关于红心杉在生长季节应对温度升高和降水时空分布不均的用水策略却鲜有报道。在一个 7 年树龄的长春花种植园中,采用 anova 方法分析了 WUEi 和不同器官中 C 和 N 浓度的差异,并测定了不同树高茎干中的δ13C 稳定同位素、C 和 N 浓度。利用逐步回归和方差膨胀因子去除自相关因子,然后利用结构方程模型探讨WUEi与气候和生物因子之间的关系。在不同的标准化降水蒸散指数(SPEI)下,叶片和枝条的 WUEi 有显著差异。WUEi 和氮浓度随着年龄的增长而降低。2020 年(SPEI = 0.00),枝条和叶片的最高 WUEi 分别为 92.7 和 88.4 μmol-mol-1。δ13C随相对树高增加,但氮浓度和C/N比未受影响。2014 至 2020 年间,气温有所上升。WUEi 和氮浓度随着枝叶年龄的增加而降低,但碳浓度有所增加。SPEI 对 WUEi 有明显的正向影响(P i 与 C 浓度明显负相关,这与 C 和水之间的权衡一致。
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来源期刊
Plant Biology
Plant Biology 生物-植物科学
CiteScore
8.20
自引率
2.60%
发文量
109
审稿时长
3 months
期刊介绍: Plant Biology is an international journal of broad scope bringing together the different subdisciplines, such as physiology, molecular biology, cell biology, development, genetics, systematics, ecology, evolution, ecophysiology, plant-microbe interactions, and mycology. Plant Biology publishes original problem-oriented full-length research papers, short research papers, and review articles. Discussion of hot topics and provocative opinion articles are published under the heading Acute Views. From a multidisciplinary perspective, Plant Biology will provide a platform for publication, information and debate, encompassing all areas which fall within the scope of plant science.
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