Anther and pollen development in some species of Poaceae (Poales)

Nakamura, Adriana Tiemi; Longhi-Wagner, Hilda María; Scatena, Vera Lúcia

doi:10.1590/s1519-69842010005000005

Cited by 18 publications

(17 citation statements)

References 33 publications

(31 reference statements)

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“…Large number of middle layers also have been observed in other woody plants such as Populus bolleana and Prunus armeniaca Julian et al 2011), which would contribute for thick anther walls. However, tapetum is a usually uniseriate, rarely multiseriate in few plants from Poaceae and Cucurbitaceae family and Peperonmia genus (Fisher 1914;Nakamura et al 2010;Pandey et al 2014). In Araliaceae family, it was also shown at least two layer of tapetum and uneven cell division during tetrad stage of T. burckii microspore (Gabarayeva et al 2009a).…”

Section: Nonsynchronous Development Of Ginseng Anther Wall Layersmentioning

confidence: 99%

Cytological characterization of anther development in Panax ginseng Meyer

et al. 2015

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Ginseng (Panax ginseng), a valued medicinal herb, is a slow-growing plant that flowers after 3 years of growth with the formation of a solitary terminal umbel inflorescence. However, little is known about cytological events during ginseng reproduction, such as the development of the male organ, the stamen. To better understand the mechanism controlling ginseng male reproductive development, here, we investigated the inflorescence and flower structure of ginseng. Moreover, we performed cytological analysis of anther morphogenesis and showed the common and specialized cytological events including the formation of four concentric cell layers surrounding male reproductive cells followed by subsequent cell differentiation and degeneration of tapetal cells, as well as the formation of mature pollen grains via meiosis and mitosis during ginseng anther development. Particularly, our transverse section and microscopic observations showed that the ginseng tapetal layer exhibits obvious nonsynchronous cell division evidenced by the observation of one or two tapetal layers frequently observed in one anther lobe, suggesting the unique control of cell division. To facilitate the future study on ginseng male reproduction, we grouped the anther development into 10 developmental stages according to the characterized cytological events.

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Section: Nonsynchronous Development Of Ginseng Anther Wall Layersmentioning

confidence: 99%

Cytological characterization of anther development in Panax ginseng Meyer

et al. 2015

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“…Because intine synthesis is largely under the control of the microspore (Nakamura et al, 2010;Yeung et al, 2011), most genes related to intine development have been isolated from segregation-distorted mutants. In Arabidopsis, several genes involved in intine formation have been reported, including USP, RGP1, RGP2, and FLA3 (Drakakaki et al, 2006;Schnurr et al, 2006;Li et al, 2010b).…”

Section: The Osgt1 Mutant Is Distinct From Previously Identified Intimentioning

confidence: 99%

“…The intine that begins to develop has a composition similar to that of the primary wall of typical plant cells and includes cellulose, pectin, and various proteins (Noher de Halac et al, 2003;Li et al, 2010b). While the tapetum plays a pivotal role in exine formation, intine synthesis is largely under the control of the microspore (Nakamura et al, 2010;Yeung et al, 2011).…”

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confidence: 99%

Rice GLYCOSYLTRANSFERASE1 Encodes a Glycosyltransferase Essential for Pollen Wall Formation

et al. 2012

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The pollen wall consists of an exine and an intine. The mechanism underlying its formation is not well understood. Glycosyltransferases catalyze the modification of biological molecules by attaching a single or multiple sugars and play key roles in a wide range of biological processes. We examined the role of GLYCOSYLTRANSFERASE1 (OsGT1) in pollen wall development in rice (Oryza sativa). This gene is highly expressed in mature pollen, and plants containing alleles caused by transfer DNA insertion do not produce homozygous progeny. Reciprocal crosses between OsGT1/osgt1 and the wild type indicated that the mutation leads to a male gametophyte defect. Microscopic analyses revealed that osgt1 pollen developed normally to the pollen mitosis stage but failed to produce mature grains. In osgt1 pollen, intine structure was disrupted. In addition, starch and protein levels were much lower in the mutant grains. Recombinant OsGT1 transferred glucose from UDPglucose to the third and seventh positions of quercetin, a universal substrate of glycosyltransferases. Consistent with the role of OsGT1, an OsGT1-green fluorescent protein fusion protein was localized to the Golgi apparatus. Taken together, our results suggest that OsGT1 is a Golgi-localized glycosyltransferase essential for intine construction and pollen maturation, providing new insight into male reproductive development.

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“…Medeanic et al (2008) illustrated images of pollen grains from nine species, while Wilberger et al (2004) presented images of pollen grains corresponding to three separate species. Nakamura et al (2010), addressing the development of anther and pollen grains in Axonopus aureus, Chloris elata , h Eragrostis solida, Olyra humilis, Paspalum polyphyllum , and Sucrea monophylla , found similar pollen morphology between taxa. This excludes those grains that have been observed to have patterns that are important for differentiation between species of the family.…”

Section: Introductionmentioning

confidence: 97%

Poaceae Pollen from Southern Brazil: Distinguishing Grasslands (Campos) from Forests by Analyzing a Diverse Range of Poaceae Species

2016

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This aim of this study was to distinguish grasslands from forests in southern Brazil by analyzing Poaceae pollen grains. Through light microscopy analysis, we measured the size of the pollen grain, pore, and annulus from 68 species of Rio Grande do Sul. Measurements were recorded of 10 forest species and 58 grassland species, representing all tribes of the Poaceae in Rio Grande do Sul. We measured the polar, equatorial, pore, and annulus diameter. Results of statistical tests showed that arboreous forest species have larger pollen grain sizes than grassland and herbaceous forest species, and in particular there are strongly significant differences between arboreous and grassland species. Discriminant analysis identified three distinct groups representing each vegetation type. Through the pollen measurements we established three pollen types: larger grains (>46 μm), from the Bambuseae pollen type, medium-sized grains (46–22 μm), from herbaceous pollen type, and small grains (<22 μm), from grassland pollen type. The results of our compiled Poaceae pollen dataset may be applied to the fossil pollen of Quaternary sediments.

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Anther and pollen development in some species of Poaceae (Poales)

Cited by 18 publications

References 33 publications

Cytological characterization of anther development in Panax ginseng Meyer

Cytological characterization of anther development in Panax ginseng Meyer

Rice GLYCOSYLTRANSFERASE1 Encodes a Glycosyltransferase Essential for Pollen Wall Formation

Poaceae Pollen from Southern Brazil: Distinguishing Grasslands (Campos) from Forests by Analyzing a Diverse Range of Poaceae Species

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