The aquatic carnivorous plant Aldrovanda vesiculosa (Droseraceae) exhibits altered developmental stages in male gametophyte

0543879 - BÚ 2022 RIV AT eng J - Journal Article
Onelli, E. - Beretta, M. - Moscatelli, A. - Caccianiga, M. - Pozzi, M. - Stroppa, N. - Adamec, Lubomír
The aquatic carnivorous plant Aldrovanda vesiculosa (Droseraceae) exhibits altered developmental stages in male gametophyte.
Protoplasma. Roč. 258, č. 1 (2021), s. 71-85. ISSN 0033-183X. E-ISSN 1615-6102
Institutional support: RVO:67985939
Keywords : pollen development * pollen structure * anther structure
OECD category: Plant sciences, botany
Impact factor: 3.186, year: 2021
Method of publishing: Limited access

We studied the structure of Aldrovanda vesiculosa pollen collected from flowers in different developmental stages (opened and non-opened anthers) from both European and Australian populations to elucidate pollination traits and poor seed set on the basis of microscopic observation of pollen and anther structure. Microscopic analyses showed that this plant has pollen arranged in tetrads like other species in the Droseraceae family. In hydrated pollen, cytoplasmic protrusions originate from pores located along the equator wall of monads, and can develop into pollen tubes. Interestingly, pollen development from microspores occurs in open anthers, suggesting a delay of the developmental stages. In addition, pollen development displays altered sperm cell formation and precocious pollen germination. Precocious germination may characterize recalcitrant pollen, which naturally do not undergo dehydration before anthesis and remain partially hydrated, particularly in aquatic and wetland plants. These alterations of male gametophyte development could affect fertilization processes, and be the reason for the low reproductive capability of Aldrovanda observed both in the field and in cultures.
Permanent Link: http://hdl.handle.net/11104/0320995