Palinologia de Amaranthaceae e Araliaceae nativas em fragmentos florestais remanescentes da região noroeste do Estado de São Paulo

Abstract

-(Palynology of native Amaranthaceae and Araliaceae in forest fragments of the Northwest of São Paulo State). We investigated the pollen morphology of two native species of Amaranthaceae and three of Araliaceae from forest fragments in order to contribute with the palynology, taxonomy, and conservation of degraded areas. The pollen grains were acetolyzed, measured, qualitatively described and photographed using light and scanning electron microscopy. Quantitative data were analyzed by descriptive statistics. The pollen grains of Amaranthaceae are monads, small, apolar, spherical, pantoporate, and with metareticulate exine. For Araliaceae, the pollen grains are monads, small to medium, isopolar, subcircular to subtriangular, oblato-spheroidal to subprolate, 3-colporate, sometimes with vestibulum, lalongate endoaperture and microreticulate exine. The pollen data confi rmed Amaranthaceae as a stenopalynous family. On the other hand, the species of Araliaceae studied characteristically present pollen grains apertures that can be used to differentiate them.

Pollen types of Sapindaceae from Brazilian forest fragments: apertural variation

“…However, morphological studies rarely describe the pollen types for the family, which could help in the morphological grouping of genera and species. Thus, the aim of this work was to identify pollen types in Sapindaceae and to expand the morphological knowledge of the analyzed species from Brazilian forest fragments, increasing the studies on pollen conducted for the area (Souza & Gasparino 2014;Belonsi & Gasparino 2015;Dutra & Gasparino 2018;Landi &Souza et al 2019).…”

Contribution to Celastraceae palynology from Cerrado forest fragments: a focus on shape, amb and exine ornamentation

“…In recent years, manifold palynological studies have been carried out in the Cerrado forest fragment areas, especially in the State of São Paulo (Brazil). Families such as Bignoniaceae (Souza and Gasparino 2014;Souza et al 2019), Malpighiaceae (Belonsi and Gasparino 2015), Rutaceae (Dutra and Gasparino 2018), Amaranthaceae and Araliaceae (Landi and Gasparino 2018), Sapindaceae (Bellonzi et al 2020), Fabaceae (Soares et al 2021(Soares et al , 2022, Rubiaceae (Dutra et al 2020), Solanaceae (Landi et al 2021), Malvaceae (Lopes et al 2022) and Boraginaceae (Landi et al 2022) have been studied. These studies showed variations in the pollen unit, polarity, shape, amb, size, aperture and ornamentation of the pollen grains of these families, contributing to the taxonomic knowledge on and the conservation of these species in the forest area.…”

A taxonomic aid arising from pollen grains of Cestrum L. and Solanum L. (Solanaceae): differences in ornamentation and aperture

“…Some studies on the pollen of native species from remaining forest fragments of Cerrado indicate variations in shape, aperture, amb, ornamentation and size of the pollen grains (Souza & Gasparino 2014;Belonsi & Gasparino 2015;Dutra & Gasparino 2018;Landi & Gasparino 2018;Souza et al 2019;Bellonzi et al 2020;Dutra et al 2020 andSoares et al 2021); therefore, the aim of this study was to identify morphological characteristics in pollen grains of Solanaceae species, in order to contribute with the palynology, taxonomy and conservation of these species in degraded areas. This analysis also intended to identify which morphological characters of the pollen grains are important in the segregation of native Solanaceae species in Cerrado forest fragments.…”