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生态学杂志 ›› 2020, Vol. 39 ›› Issue (10): 3231-3236.doi: 10.13292/j.1000-4890.202010.022

• 研究报告 • 上一篇    下一篇

高黎贡山不同海拔大百合种子权衡策略的比较

陈凯1,2*,杨艳3,徐玲1,2,刘霞1   

  1. (1保山学院, 云南省高校滇西昆虫资源保护与利用重点实验室, 云南保山 678000;2保山学院, 高黎贡山生物研究所, 云南保山 678000; 3保山市质量技术监督综合检测中心, 云南保山 678000)
  • 出版日期:2020-10-10 发布日期:2021-04-09

Comparison of seed trade-off strategies among Cardiocrinum giganteum populations along an elevational gradient in Gaoligong Mountains.

CHEN Kai1,2*, YANG Yan3, XU Ling1,2, LIU Xia1   

  1. (1Key Laboratory of Insect Resources Conservation and Utilization in Western Yunnan, Baoshan University, Baoshan 678000, Yunnan, China; 2Gaoligong Mountains Institution of Biology, Baoshan University, Baoshan 678000, Yunnan, China; 3Baoshan Comprehensive Inspection Center of Quality and Technical Supervision, Baoshan 678000, Yunnan, China).
  • Online:2020-10-10 Published:2021-04-09

摘要: 为揭示种子资源分配的权衡关系及其随海拔的变化,本研究在高黎贡山不同海拔采集大百合(Cardiocrinum giganteum)种子,并测定每个海拔的种子数量、种翅宽度、百粒重、种子脂肪与多酚含量;利用方差分析和多重比较,分析不同海拔大百合种子功能性状的差异,进一步借助主成分分析比较不同海拔种子的权衡策略。结果表明:低海拔的大百合种子比高海拔种子种翅更宽(P<0.001)、多酚含量更高(P<0.001)、脂肪含量更低(P<0.001);PC1与PC2共同解释79.61%的种子功能性状变异,在PC1与PC2的平面上低海拔种子归为一组,高海拔种子归为另一组;种子的资源分配在扩散、定植与防御之间进行权衡,低海拔种子投入更多资源至扩散与防御结构,高海拔种子储存更多能量用于定植。

关键词: 资源分配, 扩散, 定植, 防御

Abstract: To reveal trade-offs in resource allocation of plant seeds and their variation with elevation, we collected Cardiocrinum giganteum seeds along an elevational gradient and measured seed number, width of seed wings, 100-seed weight, and contents of fat and polyphenol. We analyzed the differences of seed traits among different elevations with ANOVA and multiple comparison, and assessed strategic divergence ofC. giganteum populations with principal component analysis. The results showed that seeds at low elevation had wider wings (P<0.001), higher polyphenol content (P<0.001), but lower fat content (P<0.001) compared with seeds at high elevation. PC1 and PC2, which together explained 79.61% variation of seed traits, displayed that seeds at different elevations belonged to different groups. Our results indicated that there were tradeoffs in resource allocation to dispersal, colonization and defense of seeds. Seeds at low elevation allocated more resources into diffused and defensive structures, but those at high elevation saved more energy to enhance the colonization ability of seedlings.

Key words: resource allocation, dispersal, colonization, defense.