红豆杉幼树异龄叶的功能性状

doi:10.13287/j.1001-9332.202202.003

应用生态学报 ›› 2022, Vol. 33 ›› Issue (2): 329-336.doi: 10.13287/j.1001-9332.202202.003

红豆杉幼树异龄叶的功能性状

杨克彤, 陈国鹏^*

甘肃农业大学林学院, 兰州 730070

收稿日期:2021-03-24 修回日期:2021-08-25 出版日期:2022-02-15 发布日期:2022-08-15
通讯作者: *E-mail: chgp1986@gmail.com
作者简介:杨克彤, 男, 1996年生, 硕士研究生。主要从事园林植物功能性状研究。E-mail: yangkt1996@126.com
基金资助:
国家自然科学基金项目(31800352)、甘肃农业大学科技创新基金项目(GSAU-STS-1734, GSAU-RCZX201708)和全国、甘肃省大学生创新创业训练计划项目(201710733029, 2017-500)资助。

Functional traits of leaves with different ages of Taxus wallichiana var. chinensis saplings.

YANG Ke-tong, CHEN Guo-peng^*

College of Forestry, Gansu Agricultural University, Lanzhou 730070, China

Received:2021-03-24 Revised:2021-08-25 Online:2022-02-15 Published:2022-08-15

摘要/Abstract

摘要： 植物叶片功能性状随叶龄的变化体现了植物的生活史策略,反映着植物对有限资源的权衡与配置特征。本研究以红豆杉幼树异龄叶为对象,测定了3个年龄段叶片的14个功能性状,分析红豆杉叶片老化过程中生态策略的调整方式。结果表明: 1年生叶的比叶面积显著大于2、3年生叶,3年生叶的叶厚、叶面积、叶体积、叶鲜重和叶干重显著大于1、2年生叶;1年生叶氮、磷含量与氮磷比显著高于2、3年生叶,碳氮比显著低于3年生叶;1年生叶的叶含水量与叶干重、叶厚与叶面积,3年生叶的叶厚与叶面积均表现为斜率显著小于1.0的异速生长关系,2年生叶片的多组叶性状间均显著表现为斜率不等于1.0的异速生长关系。红豆杉1年生叶倾向于光合能力提升,2年生叶侧重于干物质积累,3年生叶注重防御体系构建,异龄叶间功能性状的协调与互补对于维持个体稳态与生存具有重要意义。

关键词: 功能性状, 化学计量特征, 叶龄, 异速生长, 红豆杉

Abstract: Variations of functional traits with leaf age reflect plant life history strategy and indicate allocation pattern and trade-off characteristics in the limiting resource. In this study, leaves with different ages of Taxus wallichiana var. chinensis saplings were taken as experimental materials. Fourteen leaf functional traits of leaves at three differebt ages were measured in order to reveal changes of the saplings' ecological strategies with leaf aging. The results showed that one-year-old leaves had significantly higher specific leaf area than two- and three-year-old lea-ves, while three-year-old leaves had significantly greater leaf thickness, leaf area, volume, fresh weight and dry weight than leaves at other ages. In addition, one-year-old leaves had significantly greater nitrogen content (N), phosphorus content (P) and N:P than two- and three-year-old leaves, but lower C:N than three-old-year leaves. The slope of allometric relationship between leaf water content and dry weight, leaf thickness and leaf area of one-year-old leaves, leaf thickness and leaf area of three-year-old leaves were all significantly lower than 1.0. Two-year-old leaves showed significantly allometric relationships between many leaf traits, with slope being not equal to 1.0. In conclusion, one-year-old leaves of T. wallichiana var. chinensis saplings tended to have higher photosynthetic capacity, two-year-old leaves had stronger dry matter accumulation, and three-year-old leaves would construct defense system. The coordination and complementation of functional traits among leaves with different ages might have great significance for maintaining individual homeostasis and survival.

Key words: functional trait, stoichiometry, leaf age, allometry, Taxus wallichiana var. chinensis

杨克彤, 陈国鹏. 红豆杉幼树异龄叶的功能性状[J]. 应用生态学报, 2022, 33(2): 329-336.

YANG Ke-tong, CHEN Guo-peng. Functional traits of leaves with different ages of Taxus wallichiana var. chinensis saplings.[J]. Chinese Journal of Applied Ecology, 2022, 33(2): 329-336.

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红豆杉幼树异龄叶的功能性状

Functional traits of leaves with different ages of Taxus wallichiana var. chinensis saplings.

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