Reproductive Ecology of Flowering Plants: Patterns and Processes by Unknown

Author:Unknown
Language: eng
Format: epub
ISBN: 9789811542107
Publisher: Springer Singapore

(b)Type 5: Pollen grains directly deposited on the labellum-staminode for presentation

Fan et al. (2015) reported such an SPP in Zingiber densissimum (Zingiberaceae), where the sole fertile anther is present close to the structure consisted of the labellum fused with the staminode. During anther dehiscence, pollen grains are directly deposited on the structure for presentation.

(c)Type 6: Pollen grains directly deposited on anther hairs arising from the staminal slit

A novel type of androecial presentation is observed in Brandisia hancei (Lamiales), where the hairs on the entire abaxial surface of a dehisced anther (including the longitudinal furrow and aperture) serve as the presenter organ (Ren et al. 2018). Under natural conditions, the flowers of B. hancei are horizontally oriented, with four anthers facing downward and show approach herkogmay. The anthers dehisce longitudinally and pollen is passively shifted to the anther hairs from pollen sac, which ultimately serve as structures for secondary pollen presentation.

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