callose

The tetrasporophyte wrapped by callose is of simultaneous type.

四分体呈四面体型，被胼胝质壁所包围。

These results indicate that callose metabolism is active and very important not only in microsporogenesis but also in microgametogenesis in rice.

营养细胞的细胞质中继续积累胼胝质，花对胼胝质在小孢子和发育过程中的行了讨论。

in the early stage,the callose wall of microsporangium is thinner than that of the male fertile plant,it emits weaker flourescence;

在早期，其胼胝质壁较可育株的薄，发出的荧光较弱；

Abbreviation: T: Tapetal; N: Nucleus; TE：Tetrad; TW: Wall of tapetal cell; V: V acuole; D: Dictyosome; C: Callose; M: Mitochondria.

绒毡层细胞，N：细胞核，TE:四分体，TW：绒毡层细胞壁，V：液胞,D：高尔基体，C：胼胝质壁，M：线粒体。