濒危植物膝柄木果实特征和种子萌发特性

Fruit Characters and Seed Germination Characteristics of Endangered Plant Bhesa robusta

以膝柄木果实和种子为试验材料,测定果实和种子的长度、直径及果皮厚度等形态学特征,探讨种子生活力、吸水特性及浸种时间、温度和凋落物等对种子萌发的影响,为膝柄木种群恢复提供理论依据。结果表明,膝柄木果实和种子性状变异较小,千粒重为375.41 g,种子生活力为88.3%,种子和果实的吸水率较低,种皮透水性较差,存在种皮阻碍现象。浸种会显著抑制种子萌发,种子萌发对温度较为敏感,最佳萌发温度为28℃。自然凋落物对种子萌发有抑制作用,其中叶片水提液对种子萌发抑制影响最大。

Using the fruits and seeds of Bhesa robusta as experimental materials,the morphological characteristics such as length,diameter,and peel thickness of the fruits and seeds were measured to explore the effects of seed viability,water absorption characteristics,soaking time,temperature,and litter on seed germination,providing a theoretical basis for the recovery of B.robusta population.The results showed that there was little variation in the fruit and seed traits of B.robusta,with a 1000-grain weight of 375.41 g and a seed viability of 88.3%.The water absorption rate of the seeds and fruits was low,and the seed coat permeability was poor,leading to the phenomenon of seed coat obstruction.Soaking seeds could significantly inhibit seed germination,and the optimal germination temperature was 28℃,and seed germination was more sensitive to temperature.Natural litter had an inhibitory effect on seed germination,with leaf water extract having the greatest inhibitory effect on seed germination.