WANG Ying,SHI Yibing,ZHAO Yange,et al.Investigating the Morphological and Physiological Mechanisms Responsible for Stem Brittleness in Dahlia[J].Northern Horticulture,2026,(2):53-62.[doi:10.11937/bfyy.20251832]
大丽花茎秆易折的形态和生理机制研究
- Title:
- Investigating the Morphological and Physiological Mechanisms Responsible for Stem Brittleness in Dahlia
- 文章编号:
- 1001-0009(2026)02-0053-10
- Keywords:
- dahlia; stem strength; flexural resistance; cell wall components
- 分类号:
- S682.261
- 文献标志码:
- A
- 摘要:
- 以大丽花品种‘幻觉’和‘松兰公主’为试材，采用日光温室栽培方法，研究其不同发育时期茎秆形态及细胞壁化学成分差异，探讨影响大丽花茎秆抗折力的关键指标，以期为提高大丽花的茎秆强度提供参考依据。结果表明：‘幻觉’的茎秆抗折力在3个发育时期均极显著高于‘松兰公主’（P＜0.01）。‘幻觉’茎秆更粗、节间更短、茎壁更厚，且维管束面积更大，其木质素和纤维素含量高于‘松兰公主’，可溶性果胶含量低于‘松兰公主’。综上，茎秆形态特征（如茎粗、节间长度、茎壁厚度和维管束结构）以及细胞壁成分（如木质素、纤维素和可溶性果胶含量）是影响大丽花茎秆抗折力的重要因素。
- Abstract:
- Taking the dahlia varieties ‘Ferncilff Illusion’ and ‘Pinelands Princess’ as experimental materials，the stems morphological characteristics and cell wall chemical components at different developmental stages were investigated through solar greenhouse cultivation，and the key indexes affecting the bending resistance of dahlia stems were explored,in order to provide reference for improving the strength of dahlia stems.The results showed that the bending resistance of ‘Ferncilff Illusion’ was significantly higher than that of ‘Pinelands Princess’ at three developmental stages (P<0.01).‘Ferncilff Illusion’ had thicker stems，shorter internodes，greater stem wall thickness，larger vascular bundle area and higher contents of lignin and cellulose，while lower contents of soluble pectin conten than that of ‘Pinelands Princess’.In conclusion，stem morphological characteristics (such as stem diameter，internode length，stem wall thickness and vascular bundle structure) and cell wall components (such as lignin，cellulose and soluble pectin content) were important factors affecting the bending resistance of dahlia stem.
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备注/Memo
第一作者简介：王颖（2000-），女，硕士研究生，研究方向为观赏植物抗逆生理。E-mail：13963429811@163.com.责任作者：向地英（1978-），女，博士，讲师，现主要从事观赏植物抗逆生理等研究工作。E-mail：yyxdy@hebau.edu.cn.基金项目：河北省自然科学基金资助项目(C202204240)。收稿日期：2025-05-16