Ovule, fruit and seed development in<i>Abolboda</i>(Xyridaceae, Poales): implications for taxonomy and phylogeny

Oriani, Aline; Scatena, Vera Lúcia

doi:10.1111/boj.12152

Cited by 14 publications

(15 citation statements)

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“…Jin et al . () and Oriani & Scatena () also present studies of reproductive structures in Carex L. (Cyperaceae) and Abolboda Bonpl. (Xyridaceae), respectively, and Kiepiel & Johnson () investigate functional consequences of breeding systems in Clivia Lindl.…”

mentioning

confidence: 85%

Another good year for monocot research

Fay

2014

Bot J Linn Soc

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mentioning

confidence: 85%

Another good year for monocot research

Fay

2014

Bot J Linn Soc

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“…Variable seed coat traits are known to be cell size and shape, formation of papillae, and periclinal/anticlinal cell wall orientation (Galek et al, 2016). Primary superficial sculptures are related to the shape and arrangement of epidermis cells of the seed coat (Oriani and Scatena, 2014). Different types of cuticle contents, as well as the papillae of external walls of epidermal cells, establish secondary superficial sculptures (Salimpour et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Study of seed coat microsculpture organization during seed development inZygophyllumfabago (Zygophyllaceae)

Kazemi¹,

Kazemian²,

Majidzadeh³

et al. 2019

Turk J Bot

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The ontogeny of seed coat and endosperm tissue in Zygophyllum fabago L. was studied to determine their developmental importance using different histochemical and microscopic techniques. Our results revealed that the ovule of Z. fabago was of the anatropous and bitegmic type. The inner epidermis cells were retained up to the end of seed development, whereas the other layers were removed in the early stages. Moreover, the outer integument was changed into the seed coat sculptures during the seed development. Concurrently, multiple cytoplasmic strings were formed at the seed coat cells. Fluorescence microscopic analysis indicated that callose and polyphenols were laid down at these strings. In the late stages of the seed development, the nucleus and cytoplasm of the cells were degenerated and the sculptures became obvious on the seed coat. The seed coat sculptures may play a role in the seed dispersal by wind. During the early developmental stages, the endosperm was of the nuclear type and then changed into the cellular type. Cytochemical tests indicated that in the later stages of seed development, the formation of starch grains and the thickening of cell walls occurred, causing considerable reduction of cell cavities as well as hardening the tissue. The cell storage in the endosperm tissue was more lipidbased than protein-based. Generally, due to the degeneration of the outer integument and the existence of the thin inner integument, the endosperm cell wall seemed to be thickened to protect the embryo and to save carbohydrates. The obtained results shed more light on the development of seed tissues in the family Zygophillaceae.

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“…Despite several studies on Xyridaceae s.l., including taxonomy (Maguire 1958;Smith and Downs 1968;Kral 1992Kral , 1998Wanderley 2011), anatomy (e.g., Carlquist 1960Tomlinson 1969;Sajo and Rudall 1999;Campbell and Stevenson 2005;Scatena et al 2011;Oriani and Scatena 2012;Remizowa et al 2012), reproductive biology (Boyd et al 2011;Oriani and Scatena 2011), and palynology (Campbell 2012), among others, few embryological studies have been conducted in this family. Some aspects of ovule and seed development have been elucidated in Xyris (Weinzieher 1914;Govindappa 1953Govindappa , 1955Ramaswamy and Raju 1982;Rudall and Sajo 1999), Abolboda (Carlquist 1960;Tiemann 1985;Oriani and Scatena 2014), and Orectanthe (Carlquist 1960), but data on microsporogenesis and microgametogenesis are scarce and limited to Xyris (Weinzieher 1914;Govindappa 1955;Rudall and Sajo 1999) and Abolboda grandis (Tiemann 1985).…”

Section: Introductionmentioning

confidence: 99%

“…Some aspects of ovule and seed development have been elucidated in Xyris (Weinzieher 1914;Govindappa 1953Govindappa , 1955Ramaswamy and Raju 1982;Rudall and Sajo 1999), Abolboda (Carlquist 1960;Tiemann 1985;Oriani and Scatena 2014), and Orectanthe (Carlquist 1960), but data on microsporogenesis and microgametogenesis are scarce and limited to Xyris (Weinzieher 1914;Govindappa 1955;Rudall and Sajo 1999) and Abolboda grandis (Tiemann 1985). The characteristics of pollen grains are used in the taxonomic analysis of the family, with Xyris presenting elliptical sulcate grains with fine wall ornamentation, whereas the other genera present spherical grains without an evident aperture but with walls ornamented with projections (Carlquist 1960;Kral 1998;Campbell 2012).…”

Section: Introductionmentioning

confidence: 99%

Anther Wall Development, Microsporogenesis, and Microgametogenesis inAbolbodaandOrectanthe: Contributions to the Embryology of Xyridaceae (Poales)

Oriani

Scatena

2015

International Journal of Plant Sciences

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Editor: Patrick S. Herendeen Premise of research. Xyridaceae includes two subfamilies with a total of five genera. Xyridoideae has only the single genus Xyris, and Abolbodoideae includes the remaining genera. The inter-and intrafamilial relationships among Xyridaceae have not yet been clarified, and this study therefore aimed to investigate the anther wall and pollen grain development in Abolboda and Orectanthe species, searching for characters that can be used in taxonomic and phylogenetic analyses.Methodology. Anthers from flowers at different stages of development were examined using both LM and SEM.Pivotal results. All studied species present the following: monocotyledonous type of anther wall development, single-layered endothecium with band-like thickenings in the mature anther, single ephemeral middle layer, multilayered and plasmodial tapetum, successive microsporogenesis, and spherical inaperturate pollen grains. Characteristics such as reduced type of anther wall development, single-layered and secretory tapetum with uninucleate or binucleate cells, and elliptical sulcate pollen grains with a reticulate exine are present in Xyris and differentiate this genus from Abolboda and Orectanthe. The characteristics reported for Xyris are also present in Mayacaceae, which used to form the xyrid clade of Poales with Eriocaulaceae and Xyridaceae. Abolboda and Orectanthe share with Eriocaulaceae the monocotyledonous type of anther wall development with an ephemeral middle layer, an endothecium with band-like thickenings, and pollen grain exine with projections. The presence of a multilayered tapetum is exclusive to Abolboda and Orectanthe among the Xyridaceae and also among the Poales.Conclusions. The embryological characteristics support the division of Xyridaceae into two subfamilies. In contrast with the megasporogenesis and megagametogenesis, the microsporogenesis and microgametogenesis characteristics were quite variable within the xyrid clade, with successive microsporogenesis being the only characteristic shared by Xyridaceae, Eriocaulaceae, and Mayacaceae.

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Ovule, fruit and seed development inAbolboda(Xyridaceae, Poales): implications for taxonomy and phylogeny

Cited by 14 publications

References 40 publications

Another good year for monocot research

Another good year for monocot research

Study of seed coat microsculpture organization during seed development inZygophyllumfabago (Zygophyllaceae)

Anther Wall Development, Microsporogenesis, and Microgametogenesis inAbolbodaandOrectanthe: Contributions to the Embryology of Xyridaceae (Poales)

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