Pneumatophore (aerophore；breathing root) A specialized negatively geotropic root produced by certain aquatic vascular plants(especially trees such as mangroves , e.g. 呼吸根：指由某种水生维管植物产生的特化的负向地性根（尤其如红树，如海桑属），在土壤之上生长良好。
Pneumatophore (aerophore; breathing root) A specialized negatively geotropic root produced by certain aquatic vascular plants(especially trees such as mangroves , e.g. 呼吸根：指由某种水生维管植物产生的特化的负向地性根（尤其如红树，如海桑属），在土壤之上生长良好。
The geotropism growth was a response of hypha to gravity and the geotropic sensitive was at the hyphal apex. 试验证明：丛枝菌根真菌菌丝延伸生长部位是菌丝尖端，其生长的向地性是对地心引力的感应，感应的敏感部位也在生长菌丝的尖端。
