Abstract:
In this paper, the morphological characteristics and the influencing factors of wild jujube seed germination were systematically studied. The results showed that the wild jujube seed was developed from anatropous ovules with a mass of about 0.04 g and water content of about 8.26%. The wild jujube seed was flat heart-shaped and contained three parts, seed coat, endosperm and embryo. The wild jujube seed coat had three basic colors: yellow, purple and brown. The seed coat, as a mechanical structure, obstructed the water absorption of the seed, and the water absorption was strong in the hilum and the germination port. From the perspective of seed itself, water-soluble substances in the seed coat and seed aging inhibited seed germination, while endosperm supported seed germination. Large seed was not conducive to germination, while small seed was conducive to germination; the darker the seed coat, the lower the seed germination rate. In terms of culture conditions, the suitable culture conditions for germination of wild jujube seeds were high water content, 25 ℃, pH 7-8, no nutritional supply(nutrient salts, glucose), and light exposure.