Kim Hyeon Min, Kim Jun Hyeok, Lee Mi Hyun, Kim Gun Mo, Park Chung Youl, Lee Da Hyun, Na Chae Sun
Division of Wild Plant and Seeds, Baekdudaegan National Arboretum, Bonghwa 36209, Republic of Korea.
Experiment & Analysis Division, Incheon International Airport Regional Office, Animal and Plant Quarantine Agency, Incheon 22382, Republic of Korea.
Plants (Basel). 2024 Feb 26;13(5):648. doi: 10.3390/plants13050648.
(Thunb.) Makino is known to have a seed dispersal that is thick and stony (endocarp + seeds) and has potential as a landscaping tree seed. In several Rosaceae species, seeds are covered with a hard endocarp, making the internal seeds water-impermeable and germination difficult. Here, we analyzed the morphoanatomical traits and germination properties of . seeds. To identify ideal seed propagation conditions, we immersed . seeds in sulfuric acid for varying durations and subjected them to phytohormone (gibberellic acid A3 and fluridone) and a cold stratification (CS) (5 °C) treatment after endocarp removal (ER). The . stony seeds did not increase in mass by ≥25.0%. Following ER, the seed mass increased by ≥50.0% with water absorption when compared to the initial dry mass. Seed surfaces showed damage and cracks through scarification after 1 h of immersion in sulfuric acid, failing to germinate. A combination of ER, phytohormone treatment, and CS improved seed germination compared to ER alone (26.0 ± 5.3%). Overall, . seeds showed a dispersal with a hard endocarp from the parent plant, and a pre-treatment with ER, phytohormones, and CS was required for effective seed propagation.
（拇指状）牧野氏蔷薇已知具有厚实且坚硬的种子传播结构（内果皮 + 种子），有作为园林树木种子的潜力。在几种蔷薇科物种中，种子被坚硬的内果皮覆盖，使得内部种子不透水且难以发芽。在此，我们分析了[物种名称]种子的形态解剖特征和发芽特性。为确定理想的种子繁殖条件，我们将[物种名称]种子浸泡在硫酸中不同时长，并在去除内果皮（ER）后对其进行植物激素（赤霉酸A3和氟啶酮）和冷层积（CS）（5℃）处理。[物种名称]的坚硬种子质量增加未达到≥25.0%。去除内果皮后，与初始干质量相比，种子质量因吸水增加了≥50.0%。种子表面在硫酸中浸泡1小时后通过划破处理出现损伤和裂缝，未能发芽。与单独的去除内果皮处理（26.0 ± 5.3%）相比，去除内果皮、植物激素处理和冷层积处理相结合提高了种子发芽率。总体而言，[物种名称]种子表现出从母株传播时带有坚硬内果皮的情况，并且为实现有效的种子繁殖需要进行去除内果皮、植物激素和冷层积的预处理。
