Microsporogenesis, viability and morphology of pollen grain in accessions of Cynodon L. C. Rich. (Poaceae)

Understanding perspectives of current palynology: using science with practical discourse

“…Some palynological applications have incorporated studies such as agrobiodiversity conservation and preservation of native species in the Anthropocene into ecological and evolutionary perspectives (Mourelle et al 2016, Silva et al 2018. This research has shown that biodiversity conservation can provide ecosystem services to agriculture.…”

“…At the same time, integrated management encompasses the nexus of food, non-food, and natural resources to develop local and regional sustainable agriculture (Therond et al 2017, Zimmerer et al 2019. The relevance of this evolutionary and ecological perspective is mainly focused on the transition from global to sustainable agricultural systems, including plant breeding programs and the cooperation between companies and government institutions (Padureanu & Patras 2018, Silva et al 2018. On the other hand, avian palynology studies suggest that commercial and garden flowering trees are an essential resource for migrating warblers based on foraging preferences by palynological techniques (Wood et al 2014).…”

“…), the significant breakthroughs in the evolution and ontogeny of pollen grains began in the middle of the last century with innovations in SEM, TEM, and LM microscopy (Halbritter et al 2018, Chen et al 2019. Subsequently, a critical age of palynology began with describing the process of microsporogenesis through the Tapetum (Blackmore et al 2007) and its relationship with the detection of germplasm resources in both natural habitats and agrobiodiversity systems (Souza et al 2017, Silva et al 2018.…”

“…The palynological applications also provide economic and ecological value mainly in the Poaceae family due to their use as forage for animal feeding and erosion protection (Silva et al 2018). The accessions comparisons among species of the genus Cynodon (Poaceae) are critical for elucidating some exine patterns, meiotic abnormalities, morphological apertures, and pollen viability from germplasm banks (Silva et al 2018).…”

Male meiosis, sporad analysis and pollen viability in a threatened medicinal plant Oroxylum indicum (L.) Kurz

“…Bud size between 35-50 mm and fixation time between 6:45-7:45 (20-25 o C) was found most suitable for meiotic preparations in the investigated species (Figure 1). According to Silva et al (2018) standardization of collection time and suitable bud size that is ideal for the observation of meiocytes in different stages is a very essential step for male reproductive analysis in plants. In analyzed accessions, 2n=28 was recorded as somatic chromosome count and in general, meiosis was found to be regular (Figures 3 & 4).…”