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新鲜荔枝 (LitchichinensisSonn .)种子播种 ,1 0天左右萌发 ,胚根先突破种皮 ,胚芽随后从种子中伸出 ;胚根白色 ,直径 1 0～ 2 0 μm ,荔枝根尖有根冠、分生区、伸长区和成熟区 4个分区 ,成熟区上有根毛。初生结构由外至内依次可分为 :表皮、皮层和中柱三大部分 ;根尖后部有许多侧根性质的瘤状根 ,皮层肥厚 ,和维管束一道与根尖的皮层和维管束有机相连。荔枝播种 3 0天后的根尖和成年结果树根尖 2～ 3cm长根段以及瘤状根上都观察到了AM真菌菌丝侵染 ,但侵染率低 ,土壤中的AM真菌孢子密度也低。认为提高土壤中的AM真菌孢子数量和荔枝根系的菌根感染率 ,将是提高荔枝果实产量和质量的有效生物途径之一。
Fresh seeds of Litchichinensis Sonn were sown and germinated at about 10 days. The radicle first broke the seed coat and the embryo then protruded from the seed. The radicle was white with a diameter of 10-20 μm, Health area, elongation and mature area 4 partitions, root hair mature area. The primary structure from the outside to the inside can be divided into: the epidermis, cortex and the three parts of the column; root tip posterior many nodular nature of the root, cortical hypertrophy, and vascular bundles with root cortex and vascular bundles organic Connected. The AM fungal mycelium infection was observed in root tips and adult roots with 2 ~ 3 cm root tips at 30 days after sowing from litchi, but with low infection rate and low spore density of AM fungi in soils. It is considered that increasing the number of AM fungal spores and the mycorrhizal infection rate in litchi root will be one of the effective biological ways to improve the yield and quality of litchi fruit.