同期生长在种源地与异地同质园刨花楠叶性状分析

为辨别环境变化与遗传因素对植物叶片主要功能性状的影响，以同期生长在4种源地母树林下及异地同质园的1.5年生刨花楠苗木为研究对象，对其叶片表型及养分性状进行对比分析。结果显示：(1)刨花楠叶面积、叶厚、叶干物质含量等叶片表型性状受遗传与环境因素共同影响；叶片碳(C)含量受遗传因素调控，环境对其影响较小；叶片氮、磷(N、P)含量主要受环境因素影响；(2)不同种源刨花楠比叶面积、叶厚、叶干物质含量、叶形指数等性状变异系数较大(8.85%—37.03%),其中江西遂川种源变异系数相对较大，而湖南茶陵种源则相对较小，各种源都倾向于通过调节比叶面积、叶厚、叶片氮磷含量等性状以适应生境变化；(3)种源地与同质园刨花楠的比叶面积虽均与叶厚呈显著负相关，但同质园刨花楠比叶面积与叶形指数呈显著正相关，与叶片氮含量无明显相关，而种源地刨花楠比叶面积则与叶形指数无明显相关，与叶片氮含量则呈显著负相关；(4)不同种源苗木叶性状指标在种源地与同质园间存在不同的协调与权衡，体现了植物在不同生境下的适应策略。其中湖南茶陵种源在两种生境下都具有更保守的资源获取策略，而江西安福种源对环境变化则更为敏感，资源获取策略更为灵...

Leaf traits of Machilus pauhoi growing in the same period differ between the common garden and the provenances

To identify the effects of environmental changes and genetic factors on the functional traits of leaves, 1.5-year-old M. pauhoi seedlings grew in the same period under the seed trees of four provenances and in the common garden, were studied for comparative analysis of leaf phenotypic traits and their nutrient concentrations. The results showed that:(1) leaf phenotypic traits such as leaf area, leaf thickness, and leaf dry matter content of M. pauhoi were influenced by both genetic and environmental factors; leaf C content was regulated by genetic factors and was less influenced by the environment; leaf N and P content were mainly influenced by the environmental factors. (2) The coefficient of variation of traits such as specific leaf area, leaf thickness, leaf dry matter content, and leaf shape index was large in different provenances (8.85%-37.03%), among which the coefficient of variation was relatively large in Suichuan, Jiangxi, and relatively small in Chaling, Hunan, but all provenances tended to adapt to habitat changes by adjusting specific leaf area, leaf thickness, and leaf nitrogen and phosphorus content. (3) Although leaf area was significantly negatively correlated with leaf thickness in both the provenances and common gardens, leaf area was significantly positively correlated with leaf shape index and not significantly correlated with leaf nitrogen content in the common garden, while leaf area was not significantly correlated with leaf shape index and negatively correlated with leaf nitrogen content in the provenances. (4) Different coordination and trade-offs existed between seedlings from different provenances and the common garden, which reflected the adaptive strategies of plants in different habitats. Among them, Chaling provenance in Hunan had a more conservative resource acquisition strategy, while the Anfu source in Jiangxi was more sensitive to the environmental changes and had a more flexible resource acquisition strategy. The results of this study provide the preliminary insights into the adaptation strategies of leaf traits of M. pauhoi seedlings to genetic and environmental changes, which can provide the theoretical basis and practical reference for selecting suitable plantation environments and carrying out efficient management of M. pauhoi plantations.