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模拟和沉积对二元植物 (Populus cathayana) 的生长和防御特征的影响

Junyu Li^1,2, Yongmei Liao², Wanrong Wei^2,3

¹College of Geography and Geomatics, Xuchang University, Xuchang 461000, China.

Plants (Basel, Switzerland)

|April 26, 2025

概括

不平衡的和沉积会影响双胞胎植物. 雌性Populus cathayana表现出更大的生物质增加,而雄性对营养变化的防御反应表现出更高的敏感性.

科学领域:

生态生态学生态生态学
植物生理学植物生理学
环境科学环境科学

背景情况:

人类活动导致大气 (N) 和 (P) 沉积失衡,改变土壤营养素并影响陆地生态系统.
双质植物,具有性别特异的反应和倾斜的性别比率,易受气候变化和营养沉积等环境变化的影响.
关于不平衡的N和P沉积如何影响二元植物,特别是它们的防御机制的研究有限.

研究的目的:

研究不同N和P沉积水平对双胞胎植物*Populus cathayana*生长和防御特征之间的关系的影响.
了解对营养沉积的反应性二态,专注于生物质分配和防御物质积累.

主要方法:

模拟的梯度N和P沉积处理应用于*Populus cathayana*.
测量了生物质积累,分配 (根与叶),以及物理和化学防御物质的度.
分析了防御物质,营养含量,非结构性碳水化合物 (NSC) 和干燥生物质之间的相关性.

主要成果:

两种性别都显示了N和P沉积的生物量增加,与男性相比 (47%),女性在较低和较高 (LNHP) 条件下表现出明显更高的增加 (112%) .
雌性将更多的生物质分配给叶子,而雄性则表现出更明显的根生物质减少,随着营养物质的可用性增加.
防御物质度随着N和P沉积的增加而降低,但雄性在防御物质,营养物质,NSC和生物质之间显示出更强的相关性,这表明灵敏度更高.

结论:

在Populus cathayana对不平衡的N和P沉积的反应中存在显著的性二态,影响生长,生物质分配和防御策略.
与女性相比,男性在营养压力下对防御物质调节的变化更敏感.
这些发现为预测双胞胎植物的种群动态和在未来环境条件下管理树种植园提供了基础.

关键词:

N 和 P 的存款.防务物质是指防务物质.二氧化基二氧化基增长防御特征的成长

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