与根伤口联系的橡胶树割面干涸病的组织学研究

摘要

TThe tapping panel dryness (TPD) in Hevea brasiliensis associated with wounds in the roots was investigated by using light microscopy and transmission electron microscopy. The results showed that the prime symptoms of the TPD include laticifer necrosis and cambium-like meristem formation that occurs around the necrotic laticifer in the inner bark.The activities of the cambium-like meristem present in the early affected trees lead to formation of the deformed bark of the trees in the late stage of the disease. New necrotic laticifers with cambium-like meristem continue to form in the inner bark and this makes the disease become irreversible.%用光学显微镜和电子显微镜技术研究了与根伤口联系的橡胶树割面干涸病.结果表明该病的基本症状是在树皮内层发生乳管坏死和在坏死的乳管周围产生形成层状分生组织.早期感病树中出现的形成层状分生组织的活动导致晚期病树树皮的变形.新的坏死乳管和形成层状分生组织继续在树皮内层形成,因而使该病成为不可恢复的.