Abstract

Light and scanning electron microscopic studies of pollen and seeds were carried out for nine species of Andrographis (Acanthaceae) from India. Pollen in all species is isopolar, radially symmetric and tricolporate with elongated apertures, oblate-spheroidal in A. ovata, prolate-spheroidal in A. alata, prolate in A. echioides and A. macrobotrys to sub-prolate in A. lineata var. lawii, A. lineata var. lineata, A. paniculata, A. producta and A. serpyllifolia and lobate-circular to triangular amb. Surface ornamentation is bireticulate except in A. alata, which has microperforate and spinulate tectum. Seeds are obovoid, oblongoid, subquadrate or ellipsoid in shape. The seed coat is covered with hair in A. ovata and with echinate protuberances in A. echioides and A. serpyllifolia. The pollen characteristics of A. echioides including the colporate apertures, prolate shape, bireticulate tectum and verrucate aperture membrane are support an inclusion of this species in Andrographis, rather than considering it as Indoneesiella echioides, which has been the subject of much debate.

摘要

对来自印度的九种穿心莲（Acanthaceae）的花粉和种子进行了光学和扫描电子显微镜研究。所有物种的花粉都是等极的、径向对称的和三孔的，有细长的孔，在A. ovata 中为扁球形，在A. alata中为扁长球状，在A. echioides和A. macrobotrys 中为近扁长形，在A. lineata var. lawii , A. lineata var. lineata , A. paniculata , A. producta和A. serpyllifolia和叶状圆形到三角形amb。除A. alata外，表面纹饰为双网状，具有微穿孔和小刺状顶盖。种子呈倒卵球形、长圆形、近方形或椭圆形。A. ovata的种皮被毛覆盖，A . echioides和A. serpyllifolia的种皮上有棘状突起。A. echioides的花粉特征包括colporate 孔、长形、双网状顶盖和疣状孔膜，支持该物种包含在穿心莲中，而不是将其视为Indoneesiella echioides，后者一直是许多争论的主题。