Distribution of plastids and mitochondria during male gametophyte formation in Tinantia erecta (Jacq.) Fenzl

Abstract

During meiosis in microsporogenesis, autonomous cellular organelles, i.e., plastids and mitochondria, move and separate into daughter cells according to a specific pattern. This process called chondriokinesis is characteristic for a given plant species. The key criterion for classification of the chondriokinesis types was the arrangement of cell organelles during two meiosis phases: metaphase I and telophase I. The autonomous organelles participate in cytoplasmic inheritance; therefore, their precise distribution to daughter cells determines formation of identical viable microspores. In this study, the course of chondriokinesis during the development of the male gametophyte in Tinantia erecta was analyzed. The study was conducted using optical and transmission electron microscopes. During microsporogenesis in T. erecta , autonomous cell organelles moved in a manner defined as a neutral-equatorial type of chondriokinesis. Therefore, metaphase I plastids and mitochondria were evenly dispersed around the metaphase plate and formed an equatorial plate between the daughter nuclei in early telophase I. Changes in the ultrastructure of plastids and mitochondria during pollen microsporogenesis were also observed.

The agricultural and therapeutic potential of <i>Lavatera thuringiaca</i> (L.)

“…Moreover, an unusually strong perinuclear radial microtubule system occurring in telophase I and II in the species studied and the presence of a phragmoplast in a small space devoid of cell organelles between aggregates composed of cell organelles surrounding the progeny nuclei were observed. It was found that meiosis in L. thuringiaca microsporogenesis is similar to that occurring in most plants with simultaneous cytokinesis, but the movement of organelles during meiosis is very unique and specific (Brownfield et al, 2015;Marciniec et al, 2019). Microtubules were found to be closely associated with karyokinesis and chondriokinesis during microsporogenesis in L. thuringiaca, and thus determined the formation of functional pollen grains (Tchórzewska et al, 2008).…”

Structural regulation and dynamic behaviour of organelles during plant meiosis

“…However, there are not many reports of similar polar organelle grouping in plants that exhibit a successive-type of cytokinesis. A notable example of this is reported in the monocot widow’s tears ( Tinantia erecta ), in which plastids and mitochondria were observed to group at the cell poles during early prophase I ( Marciniec, Zieba et al, 2019 ).…”

ANTIFUNGAL AND ANTIOXIDANT POTENTIAL OF ETHANOLIC AND AQUEOUS EXTRACTS OF THE WILD PLANT CONSUELA (<i>Tinantia erecta</i>)

“…Tinantia erecta is a native species of Latin America that belongs to the Commelinaceae family and that can be found as a wild plant mainly in crop fields of corn, coffee, and beans. It is used as forage, as an edible wild plant, and as an ornament (Villaseñor and Espinosa, 1998;Mera-Ovando et al, 2003;Marciniec et al, 2019). Due to its high adaptability and distribution, this species could serve as a source of compounds with potential antifungal activity.…”