Seed dormancy,germination and storage behavior of Magnolia sinica,a plant species with extremely small populations of Magnoliaceae

• 作者: Liang Lin Lei Cai Lei Fan Jun-Chao Ma Xiang-Yun Yang Xiao-Jian Hu
• 来源期刊: 植物多样性（英文版）
• 年，卷（期）: 2022,（1）
• 所属期刊栏目: Articles
• 页码范围: 94-100
• 页数: 7页
• 语种: 英文

摘要

Magnolia sinica is one of the most endangered Magnoliaceae species in China.Seed biology information concerning its long-term ex situ conservation and utilization is insufficient.This study investigated dormancy status,germination requirements and storage behavior of M.sinica.Freshly matured seeds germinated to ca.86.5％ at 25/15 ℃ but poorly at 30 ℃;GA3 and moist chilling promoted germination significantly at 20 ℃.Embryos grew at temperatures (alternating or constant) between 20 ℃ and 25 ℃,but not at 5 ℃ or 30 ℃.Our results indicate that M.sinica seeds possibly have non-deep simple mor-phophysiological dormancy (MPD).Seeds survived desiccation to 9.27％o and 4.85％ moisture content (MC)as well as a further 6-month storage at-20 ℃ and in liquid nitrogen,including recovery in vitro as excised embryos.The established protocol ensured that at least 58％ of seedlings were obtained after both cold storage and cryopreservation.These results indicate that both conventional seed banking and cryopreservation have potential as long-term ex situ conservation methods,although further optimized approaches are recommended for this critically endangered magnolia species.