Cellular components of the midstylar transmitting tissue of Prunus avium

Abstract

Proportions of cellular components in the midstylar transmitting tissue of Prunus avium L., sweet cherry, were determined using the point interception method on transmission electron micrographs. Changes were measured during the development of the style when comparing pistils collected 1 week before anthesis with unpollinated pistils at the anthesis stage. Transmitting tissue was also examined 20 h after cross- and self-pollination. The results illustrate complex patterns of cellular development including changes in vacuolation, cell wall – intercellular substances, and starch. Other cellular components were also quantified and are discussed. After pollination, further cell wall – intercellular substances increases occur but no differences were found between cross- and self-pollination.

Quantification of cellular penetrative forces using lab-on-a-chip technology and finite element modeling

“…In many species, however, this canal is filled completely with the transmitting tissue and the tube has to invade and dilate the apoplastic space between the cells composing this tissue (23). Transmission electron microscopy has shown that the space between the cells typically is narrower than what would be required for the tube to pass unhindered (25,26). Depending on the plant species, pollen tube invasion is facilitated by digestive enzymes that soften the apoplast and are secreted either by the pollen tube (27) or by the pistillar cells themselves (28), or the transmitting tissue is triggered to undergo programmed cell death (29).…”

Ultrastructural study on the stylar transmitting tissue in Japanese pear

“…In the style, self-incompatible pollen tubes fail to retain the basal portion of the style (Asami 1926). The stylar tissue of several species with a solid style, such as Petunia (Kroh and Helsper 1974;Sassen 1974), tobacco (Bell and Hicks 1976), Lycopersicon pervianum (Cresti et al 1976), avocado (Sedgley and Buttrose 1978), Malus communis (Cresti et al 1980), and Prunus avium (Uwate et al 1982), have been examined by electron microscopy. In these styles the intercellular space of the transmitting tissue is filled with secretions.…”