Structure of the Pollen Wall |
A The exine is composed of nexine and sexine. The cavities of the sexine are filled with pollen cement. The exine consists mainly of sporopollenin while the intine's main component is cellulose. The structural elements of the sexine are called tectum, baculum or pilum depending on the structure of the sexine. B.
(according to P. ZANDONELLA et al., 1981)
