Impact of Manganese on Pollen Germination and Tube Growth in Lily

Sawidis T., Bayçu G. , Weryszko-Chmielewska E., Sulborska A.

Acta Agrobotanica, vol.74, pp.1-17, 2021 (Journal Indexed in ESCI)

  • Publication Type: Article / Article
  • Volume: 74
  • Publication Date: 2021
  • Title of Journal : Acta Agrobotanica
  • Page Numbers: pp.1-17


he role of manganese in pollen germination and pollen tube growth. Pollen

germination was adversely affected by the presence of manganese (>10−8 M),

whereas low concentrations (10−12–10−10 M) stimulated the process. Manganese

caused morphological anomalies during tube growth, characterized by irregular

pollen tube thickening and swollen tips. e main effect was the anomalous cell

wall formation at the tip, in which the presence of several organelles reduced the

number of secretory vesicles. A loose network of fibrillar material and spherical

aggregates, mostly in the tip region, was detected, and this material was

progressively loosened into the surrounding medium. As a response to potential

toxicity, the excess manganese was isolated in vacuoles, which formed an internal

barrier against penetration of manganese to the tip area. Elevated manganese

concentrations might affect plant reproduction, resulting in anomalies in gamete

development. Consequently, the loss in genetic diversity and decreased fruit set

ultimately lower yield.