New trends in Passiflora L. pollen grains: morphological/aperture aspects and wall layer considerations

Richardo, Jaiana; Silvério, Adriano

doi:10.1007/s00709-019-01350-w

Cited by 6 publications

(4 citation statements)

References 42 publications

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“…It is known that all these processes are directed to the production of nutrients that will support the development of pollen grains. Passiflora species have large pollen grains and a sculpted exine, which require many precursors and need an organised nutrition network (Lei & Liu, 2020; Richardo & Silvério, 2019, Silvério & de Araujo Mariath, 2014). Species with less ornate and smaller pollen grains seem to not need high levels of ploidy or multinucleation during tapetal development (Gotelli et al, 2016; Souza et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Nuclear variations and tapetum polyploidy related to pollen grain development in Passiflora L. (Passifloraceae)

Parteka

Mariath

Vanzela

et al. 2022

Cell Biology International

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Tapetal cells comprise an anther tissue fundamental to pollen grain development. They are associated with endoreduplication events, which culminate in polyploid and multinucleated cells, high metabolic activity, and different organelle arrangements to support all the development of the pollen grains. Passiflora species present a secretory tapetum, with diversity in the number and size of nuclei. Tapetal cells undergo numerous changes in a short period of development when compared to the plant's life span. To improve our knowledge of tapetum development, tests assessing ploidy levels, anatomy, cytochemistry, transmission electron microscopy, flow cytometry, as well as conventional and molecular cytogenetics were used in Passiflora actinia and P. elegans. The current data show striking differences in nuclear organisation during tapetal cell development, including mono to quadrinucleate cells, and ploidy levels from 2n to 32n. One of the most peculiar features was the atypical behaviour of the endoplasmic reticulum (ER), which accumulated in the cell border, similar to a ‘cER’, as well as large dictyosomes. This endomembrane configuration may be related to the tapetum nutritional network and secretion of compounds at the end of meiosis. Another atypical feature of the ER was the formation of an invagination to establish ‘binucleated’ polyploid cells. This membrane projection appears when the nuclei form two lobes, as well as when it organises a nucleoplasmic reticulum. These data demonstrate that there are important ultrastructural changes in tapetal cells, including organelle arrangements, ploidy levels, and nuclear activity, common to P. actinia and P. elegans, but different from the plant model A. thaliana.

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Section: Discussionmentioning

confidence: 99%

Nuclear variations and tapetum polyploidy related to pollen grain development in Passiflora L. (Passifloraceae)

Parteka

Mariath

Vanzela

et al. 2022

Cell Biology International

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“…Species with null or low severity can be used to intensify the genetic improvement programs of Passi ora via interspeci c crosses. However, interspeci c hybridizations with commercial species, in some cases, may not succeed due to differences in the number of chromosomes (P. pohlii [2n = 12 and 36] and P. suberosa [2n = 12, 24 and 36]) and belong to different subgenera [49,50] and in the same subgenre can occur barriers of crossings or lack of synchronism in the owering [51]. However, in some cases the interspeci c barriers of incompatibility are relatively fragile, and there may be success in hybridization [52].…”

Section: Discussionmentioning

confidence: 99%

Cowpea aphid-borne mosaic virus (CABMV) in Passiflora by qPCR analysis reveals asymptomatic plants with viruses and new species with immunity

Gonçalves¹,

Jesus²,

Lima³

et al. 2021

Preprint

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The passion fruit woodiness disease (Cowpea aphid-borne mosaic virus – CABMV) causes socioeconomic problems for Brazilian passion fruit crop. Understanding the temporal progress of the disease and identifying resistance sources to CABMV are essential steps to develop resistant varieties. The objective of the study was to evaluate temporal progress of passion fruit woodiness disease, identify Passiflora genotypes with CABMV resistance and to detect virus infection in asymptomatic plants by qPCR. The experiment was conducted in a greenhouse using 128 genotypes belonging to 12 species and three hybrids (inter and intraspecific) of Passiflora evaluated in five periods after inoculation. The symptoms severity was quantified from the disease index (DI%). The CABMV infection in symptomatic plants was confirmed by RT-PCR and in asymptomatic plants by qPCR. Progress rates and disease severity were lower in the species P. cincinnata, P. gibertii, P. miersii e P. mucronata compared to P. edulis, P. alata, Passiflora sp. and hybrids. Of the evaluated genotypes, 20.31% were resistant, with emphasis on the accessions of P. suberosa, P. malacophylla, P. setacea, P. pohlii e P. bahiensis that did not show symptoms of virus. The absence of symptoms does not imply immunity of plants to the virus, as the qPCR analysis confirmed infection by the virus in asymptomatic plants of P. cincinnata, P. gibertii, P. miersii, P. mucronata, P. setacea, P. malacophylla e P. suberosa. Even after four inoculations, the virus was not detected by qPCR in the upper leaves in plants of P. pohlii and P. bahiensis indicating that these species are immune to CABMV.

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“…pollen described and illustrated by Palazzesi et al (2014) to Passiflora, but further exploration of the literature for this study necessitated a reconsideration. Some Passiflora pollen grains often have six colpi fused in pairs, with each pair surrounding a pseudoperculum, for a total of three pseudopercula; this type of pollen is characteristic of Passiflora subgenus Passiflora (Amela García et al, 2002;Dettke and Santos, 2009;Mezzonato-Pires et al, 2015;Soares et al, 2018;Richardo and Silvério, 2019;Cruz et al, 2020), although similar pollen also occurs in some species of the small subgenus Tryphostemmatoides (Araújo et al, 2021). The fossil pollen Passifloriidites pseudoperculatus has morphology consistent with this three-pseudoperculate type; specifically, P. pseudoperculatus pollen grains from which the pseudopercula are detached have three large, circular lacunae in their walls (D'Apolito et al, 2021).…”

Section: Supporting Informationmentioning

confidence: 99%

“…grain (Palazzesi et al, 2014; 2021) was skeptical of its relationship to Passiflora. It is here noted, therefore, that pollen produced by some species in subgenus Passiflora supersection Stipulata (e.g., P. actinia Hook., P. elegans Mast., P. gardneri Mast., P. gibertii N.E.Br., P. tenuifila Killip) can have more than three pseudopercula distributed around the surface of the grain (Dettke and Santos, 2009;Gonçalves, 2019;Richardo and Silvério, 2019;Cruz et al, 2020;Parteka et al, 2021). Such grains would appear similar to the Syncolpites sp.…”

Section: Supporting Informationmentioning

confidence: 99%

Pliocene seeds of Passiflora subgenus Decaloba (Gray Fossil Site, Tennessee) and the impact of the fossil record on understanding the diversification and biogeography of Passiflora

Hermsen

2023

American J of Botany

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Premise: Passiflora is a diverse genus of ~570 extant species primarily distributed in the Americas, from the eastern United States to Argentina and Chile. Nevertheless, the known fossil record of Passiflora is small. To date, only two fossil seed species have been unequivocally assigned to the genus. In this contribution, rare sulcate seeds from Gray Fossil Site are described as a third fossil seed species of Passiflora. Methods: Three partial seeds with sulcate sculpture from Gray Fossil Site, early Pliocene, Tennessee, USA, were examined, photographed, and measured. They were compared to samples of sulcate seeds from six extant Passiflora species in supersection Decaloba. A broader survey of sulcate seeds produced by modern species in the subgenera Decaloba, Deidamioides, and Tryphostemmatoides was done using published illustrations and descriptions. Results: The Gray Fossil Site seeds are described as Passiflora sulcatasperma, sp. nov., and assigned to subgenus Decaloba, supersection Decaloba. They are characterized by their small size, elliptical shape, ridged-and-sulcate sculpture, rugulose ridges, and thin palisade seed coat. Conclusions: The two largest subgenera of Passiflora can be identified from Neogene fossils. Subgenus Decaloba is represented by two fossil seed species, P. bulgarica (Miocene, Bulgaria) and P. sulcatasperma (Pliocene, USA). Subgenus Passiflora is represented by fossil pollen (Miocene, Argentina and Brazil) and P. appalachiana seeds (Pliocene, USA). The distributions of fossil and modern species suggest that Passiflora may have used both North Atlantic and Antarctic routes to expand into Europe and the Asian-Oceanian Paleotropics, respectively.

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New trends in Passiflora L. pollen grains: morphological/aperture aspects and wall layer considerations

Cited by 6 publications

References 42 publications

Nuclear variations and tapetum polyploidy related to pollen grain development in Passiflora L. (Passifloraceae)

Nuclear variations and tapetum polyploidy related to pollen grain development in Passiflora L. (Passifloraceae)

Cowpea aphid-borne mosaic virus (CABMV) in Passiflora by qPCR analysis reveals asymptomatic plants with viruses and new species with immunity

Pliocene seeds of Passiflora subgenus Decaloba (Gray Fossil Site, Tennessee) and the impact of the fossil record on understanding the diversification and biogeography of Passiflora

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