目的：了解广寄生种子结构与种子萌发过程及其影响萌发的因素。方法:采用体视显微镜观察广寄生种子萌发过程和智能人工气候箱培养观察广寄生种子萌发的影响因素。结果:①广寄生种子由种皮、胚与胚乳构成，胚由胚芽与“类胚根”构成，其中“类胚根”为分化形成种子初生吸器的器官；②种子不具休眠期，可以独立萌发。萌发时首先见“类胚根”从种孔“露头”膨大并逐渐分化形成初生吸器，同时芽也从种孔长出；③广寄生种子含水量为50%，种子对干燥脱水敏感，当含水量下降到25%时种子的萌发率为0；④广寄生种子适宜萌发温度为20~30℃，低于10℃和高于40℃萌发率为0；⑤种子无论有无光照均能独立萌发，在有光照条件下分化形成的初生吸器通常为一个，并呈现避光性分化；在无光照条件下种子则能分化形成多个吸器；⑥在有寄主情况下，种子的初生吸器分化形成朝向寄主；⑦种子不耐储藏，寿命短暂。结论:广寄生种子不具休眠期，种子一经成熟即可萌发生长，属于顽拗型种子类型，种子由种皮、胚与胚乳构成，成熟的胚由胚芽与“类胚根”器官构成，初生吸器在种子萌发时在“类胚根”基础上逐渐分化形成。

This work aimed to examine the seed structure and germination of Taxillus chinensis (DC.) Danser, and determine the factors affecting germination. The germination process was observed under a stereomicroscope, and the factors affecting germination were examined in the Intelligence Artificial Climate Box. The results showed that the seed was composed of testa, embryo and endosperm, and the embryo composed of germ and the radicle-like organ. The primary haustorium differentiated from the radicle-like organ. The seed could germinate very well at 20-30℃without dormancy. But it could not germinate when water content decreased from 50% to 25% or when the temperature was below 10℃ or above 40℃. One primary haustorium differentiated in the light condition, while more primary haustoriums differentiated in the dark. The primary haustorium differentiated towards the host. Seeds were short-lived and impatient in storage. Taken together, seeds of Taxillus chinensis (DC.) Danser are recalcitrant without dormancy.

广西壮族自治区科学研究与技术开发计划项目（桂科攻0630002-3G）：桑寄生规范化种植研究，负责人：卢栋；广西壮族自治区科学研究与技术开发计划项目（桂科攻0992003B-30）：中药桑寄生种质资源圃开发，负责人：李永华。