生态学杂志2024，Vol.43Issue(4)：1102-1112,11.DOI:10.13292/j.1000-4890.202403.017
我国三种含羞草属入侵植物种子休眠释放对温度的响应
Response of seed dormancy release to temperature in three Mimosa species in China
摘要
Abstract
The response of seed dormancy and germination to temperature is closely related to species distribution.Understanding the response of weed seed germination to temperature is of great significance for predicting its poten-tial invtsion area and preventing and controlling.In this study,we examined the response of seed dormancy and germination of three common tropical Mimosa species(M.pudia,M.diplotricha and M.diplotricha var.inermis)to temperature variation(25,30,35 and 40 ℃).The results showed that:(1)Seeds of three Mimosa species had physical dormancy.The seed hardness percentage of M.pudia,M.diplotricha,and M.diplotricha var.inermis were 91％,96％,and 100％,respectively.(2)High temperature(40 ℃)could effectively promote the release of phy-sical dormancy of M.pudia seeds.According to the observation of seed coat microstructure,under the palisade layer of M.diplotricha and M.diplotricha var.inermis seeds were composed of a layer of osteosclereids with thickened and lignified cell walls and several layers of hardened parenchyma tissue.There were only a few layers of hardened pa-renchyma tissue under the palisade layer of M.pudia seeds.High temperature increased the permeability of seed coat structure of special parts,such as lens,hilum,and micropyle,thereby effectively breaking the physical dor-mancy of M.pudia seeds.Our results can provide basic theoretical reference for resisting the further invasion of this species in China and reducing its ecological harm.关键词
含羞草属/休眠释放/萌发/高温/入侵杂草Key words
Mimosa/dormancy release/germination/high temperature/invasive weed引用本文复制引用
吴延娜,唐丽,万琪,郭长林,骆凯,陈银华,张瑞..我国三种含羞草属入侵植物种子休眠释放对温度的响应[J].生态学杂志,2024,43(4):1102-1112,11.基金项目
海南省自然科学基金青年基金项目(320QN195)和国家木薯产业体系-hncyh(No.CARS-11-hncyh)资助. （320QN195）
