Seed Science Research ( IF 2.1 ) Pub Date : 2023-06-27 , DOI: 10.1017/s0960258523000144 Jose M. Rojas-Villa , Mario A. Quijano-Abril
Seed dormancy is a key trait used around the world to help understand the ecological dynamics of plant species, however, in some ecosystems such as the Andean forests of Colombia, the identification of dormancy class remains poorly known. To address this, we described the morphology, anatomy and dormancy class of the seeds and fruits of 14 species using microtome sections, light microscopy and scanning electron microscopy. Five native pioneer species showed Morphophysiological Dormancy, three Physical Dormancy + Physiological Dormancy and two Physical Dormancy, whereas two invasive species showed Physiological Dormancy. Only the species of the genus Cecropia had seeds with PY + PD that was promoted by the anatomical structure of the achenes. Of the analysed species, 85% showed dormancy and followed a pattern like other tropical montane ecosystems in the world. The anatomy of achenes and development of seed dormancy play important roles in the capacity of Cecropia species to contribute to the natural regeneration of Andean ecosystems. Additionally, seed dormancy may promote the high invasiveness of Thunbergia alata and Ulex europaeus in the Andean forests of the Central Cordillera of Colombia.
中文翻译:
哥伦比亚安第斯山地森林 14 个物种的种子解剖学和休眠等级
种子休眠是世界各地用来帮助了解植物物种生态动态的一个关键性状,然而,在哥伦比亚安第斯森林等一些生态系统中,休眠类别的识别仍然鲜为人知。为了解决这个问题,我们使用切片机切片、光学显微镜和扫描电子显微镜描述了 14 个物种的种子和果实的形态、解剖学和休眠类别。5 个本土先锋物种表现出形态生理休眠,3 个物理休眠+生理休眠和2 个物理休眠,而2 个入侵物种则表现出生理休眠。仅天蚕属物种具有 PY + PD 的种子,这是由瘦果的解剖结构促进的。在分析的物种中,85% 表现出休眠状态,并遵循与世界其他热带山地生态系统类似的模式。瘦果的解剖结构和种子休眠的发展对于天蚕物种促进安第斯生态系统自然更新的能力发挥着重要作用。此外,种子休眠可能会促进哥伦比亚中部科迪勒拉安第斯森林中的风藤和欧洲荆豆的高度入侵。