背景:海南马氏。,中国潮湿热带雨林的指示物种,由于种群再生的困难而濒临灭绝。在这项研究中,首次对种子的生物学特性和萌发适应性进行了研究,为分析海南红豆杉的危害原因和人工栽培策略提供依据。生物学特征的影响(种群,arils,种皮,种子重量,种子水分含量)和环境因素(温度,光,干旱,基材,埋藏深度)对海南红豆杉种子萌发和幼苗生长的影响。
结论:发现果实是含有包裹在果皮和肉质假种皮中的种子的胶囊,提供保护和帮助种子传播,但也会给种子带来风险,因为果皮和肉质假种皮在高温和高湿条件下会发霉。不同群体间果实形态和萌发特性存在显著差异,以及念店村种群的种子质量,大新县,崇左市,广西壮族自治区表现较好。杨木显著抑制种子萌发,大种子发芽较好,中等种子的幼苗生长优越。海南H.种子对脱水敏感,不耐受干旱和低温,这是典型的顽固种子。种子适合在30-35℃下具有良好保水性和透气性的潮湿基质表面上萌发。
BACKGROUND: Horsfieldia hainanensis Merr., an indicator species of China\'s humid tropical rainforests, is endangered due to difficulties with population regeneration. In this study, the biological characteristics and germination adaptability of the seeds were studied for the first time, in order to provide a basis for analyzing the causes of endangerment and strategies for the artificial cultivation of H. hainanensis. The effects of biological characteristics (population, arils, seed coat, seed weight, seed moisture content) and environmental factors (temperature, light, drought, substrate, burial depth) on seed germination and seedling growth of H. hainanensis were studied.
CONCLUSIONS: The fruits were found to be capsules containing seeds wrapped in a pericarp and fleshy aril, which provide protection and assist in seed dispersal, but also pose risks to the seeds, as the peel and fleshy aril can become moldy under high temperature and humidity conditions. There were significant differences in fruit morphology and germination characteristics among different populations, and the seed quality of populations in Niandian village, Daxin County, Chongzuo City, Guangxi Zhuang Autonomous Region was better. The arils significantly inhibited seed germination, the germination of large seeds was better, and seedling growth from medium seeds was superior. H. hainanensis seeds were sensitive to dehydration, and intolerant to drought and low temperature, which is typical of recalcitrant seeds. The seeds are suitable for germination on a moist substrate surface with good water retention and breathability at 30-35℃.