Figure 6
From: Factors affecting quantity of pollen dispersal of spray cut chrysanthemum (Chrysanthemum morifolium)
Pollen abortion during pollen development of ‘Qx-115’ and ‘Kingfisher’. ‘Qx-115’ (A-B) and ‘Kingfisher’ (C-F). (A) Microspores at middle microspores stage of ‘Qx-115’, showing many broken, incomplete and abortive microspores. (B) Late microspores stage in ‘Qx-115’, it has few complete pollen grains in the anther. (C) Asymmetrical and abnormal dyad. (D) Asymmetrical and abnormal tetrad. (E) Degradation of tetrads, microspores can’t move apart and cytoplasm was degraded and in vacuolization. (F) Early microspores stage, showing pollen sac with no pollen grains of ‘Kingfisher’. AD: Abnormal dyad; AT: Abnormal tetrad; BM: Broken microspore; MD: Microspore in degradation; TaD: Tapetum debris.