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Updated: Feb 1, 2026

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进化约束和气候变异性共同塑造木质植物中粉糖平衡
Weibin Li1, Nate G McDowell2,3
1State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems; Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs; Engineering Research Center of Grassland Industry, Ministry of Education; College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, China.
The New phytologist
|January 31, 2026
概括
植物碳分配策略,用粉与可溶糖的比率 (St:Su) 来衡量,与生长和弹性有关. 这项全球性研究揭示了木质植物如何在器官和生物群中分离非结构性碳水化合物 (NSC).
科学领域:
- 植物生理学 植物生理学
- 生态生态学 生态生态学
- 全球变化生物学
背景情况:
- 非结构性碳水化合物 (NSC) 对植物碳平衡至关重要.
- 在全球范围内理解NSC分区 (粉与可溶糖) 是至关重要的,但具有挑战性.
- 粉与可溶糖的比率 (St:Su) 是碳分配的一个关键指标.
研究的目的:
- 在木质植物中调查NSC分区的全球模式.
- 为St:Su引入一个无维度索引以标准化测量.
- 将St:Su与植物生长,器官特定策略和环境因素联系起来.
主要方法:
- 编制了St:Su的全球数据集,涵盖220个地点的308个木质物种.
- 开发了一个无维度索引,将存储和需求整合起来.
- 分析了跨器官,生物体,植物系和气候的St:Su变化.
主要成果:
- St:Su与植物生长有很强的相关性,这表明它在碳分配中的作用.
- 叶片通常比木质组织具有较低的St:Su,区分短暂和储存池.
- 针叶树在粉积累方面与芽植物不同; 叶子习惯和菌根菌也会影响St:Su.
- 圣苏在生物群中叶子/根的变化有限,但在热带地区的更高的茎圣苏.
- 树系学影响茎的储存;气候变化,而不是平均条件,驱动了叶子/根的分配.
结论:
- St:Su是一个强大的功能特征,连接碳分配,增长和弹性.
- 这些发现改善了用于预测气候变化下的森林生产率和死亡率的植被模型.
- 全球St:Su模式揭示了木质植物对碳管理和适应的各种策略.
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