刺桐的主要价值

2025年04月08日 04:53
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刺桐树皮或根皮入药,称海桐皮,祛风湿,舒筋通络,治风湿麻木,腰腿筋骨疼痛,跌打损伤,对横纹肌有松弛作用,对中枢神经有镇静作用。但有积蓄作用,毒性主要表现为心肌及心脏传异系统的抑制。树皮含生物碱下箴刺桐碱(hypaphorine, C14H18O2N2)、刺桐灵(erythraline, C18H19O3N)、甜菜碱(beteine, C5H11O2N)、胆碱(choline, C5H15O2N)
性状性味
树叶、树皮和树根可入药,有解热和利尿的功效。
苦、辛,平。消炎、解热、祛风、利湿、止痛。
药毒理学
该物种为中国植物图谱数据库收录的有毒植物,其毒性为茎皮有毒。小鼠腹腔注射5g/kg茎皮的石油醚提取物出现翻正反射消失、肌肉松弛,可持续4小时;小鼠腹腔注射21g/kg、嫩枝的水提取物后3分钟出现活动减少、扭体、闭眼伏地。成人肌肉注射30g茎皮的提取物后出现头昏、嗜睡、全身无力等症状茎皮中总生物碱10-20mg/kg能引起大鼠和小鼠痉挛,5mg/kg能延长大鼠巴比妥钠睡眠时间;它有神经肌肉阻断作用、平滑肌松弛作用和中枢神经系统抑制作用。总碱的大鼠腹腔注射LD50为127.8mg/kg。
药理作用
海桐皮水浸剂(1:3)在试管内对蓝色毛癣菌、许兰氏黄癣菌、铁锈色小芽胞癣菌、腹股沟表皮癣菌等皮肤真菌均有不同程度的抑制作用。海桐皮在体外对金黄色葡萄球菌亦有抑制作用。
用药禁忌
1、血虚者不宜服。
2、《本草经疏》:腰痛非风湿者不宜用。
3、《本草汇言》:痢疾、赤眼、痹躄诸证非关风湿者不宜用。
4、《得配本草》:血少火炽者禁用。 刺桐适合单植于草地或建筑物旁,可供公园、绿地及风景区美化,又是公路及市街的优良行道树。花美丽,可栽作观赏树木。本种生长较迅速,可栽作胡椒的支柱。

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