Aperture pattern ontogeny in angiosperms

Ressayre, Adrienne; Godelle, Bernard; Raquin, Christian; Gouyon, Pierre Henri

doi:10.1002/jez.10150

Cited by 60 publications

(93 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Variation in PMC shape may have evolved because of selection, although this hypothesis remains unclear with regard to pollen morphology since all of the study species produce monosulcate pollen grains (Penet et al 2007). PMC shape variation may also arise as a by-product of other processes, such as polyploidy or genome size (Ressayre et al 2002). However, because DNA content is highly variable among our study species, one would have expected greater PMC shape diversity in our sample than was actually observed.…”

Section: Discussionmentioning

confidence: 88%

“…Depending on how cell walls are formed during cytokinesis to separate microspores, different tetrad shapes generate different aperture patterns (Ressayre et al 2002). In all of our study species, successive cytokinesis is as- Fig.…”

Section: Discussionmentioning

confidence: 99%

“…At the molecular level, many studies have investigated specific pollen genes and proteins and are beginning to unveil the details of cell structure, organization, and patterning during pollen development (Wilson and Zhang 2009;Ma and Sundaresan 2010;Grossniklaus 2011). Also, the description of key features of pollen development (i.e., microsporogenesis) revealed the connection between pollen grain development diversity and the resulting phenotypic diversity (e.g., size, shape, ornamentation, and specialized pollen germination structures such as apertures; Ressayre et al 2002;Albert et al 2009Albert et al , 2011a. Furthermore, it has been shown that pollen diversity may functionally relate to the ecology of pollination (Hesse 2000;Sannier et al 2009).…”

Section: Introductionmentioning

confidence: 98%

See 2 more Smart Citations

Premeiotic Microsporocyte Cell Shape Influences Shape of Tetrads during Microsporogenesis

Penet

2012

International Journal of Plant Sciences

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 88%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

Premeiotic Microsporocyte Cell Shape Influences Shape of Tetrads during Microsporogenesis

Penet

2012

International Journal of Plant Sciences

View full text Add to dashboard Cite

“…We suggest naming these areas last points of callose deposition (LPCD). The LPCD are variable in number and position, as three features of microsporogenesis can change the LPCD pattern (Ressayre et al. , 2002a).…”

Section: Introductionmentioning

confidence: 99%

Evolutionary stasis in Euphorbiaceae pollen: selection and constraints

Matamoro‐Vidal

Furness

Gouyon

et al. 2012

J of Evolutionary Biology

View full text Add to dashboard Cite

Although much attention has been paid to the role of stabilizing selection, empirical analyses testing the role of developmental constraints in evolutionary stasis remain rare, particularly for plants. This topic is studied here with a focus on the evolution of a pollen ontogenetic feature, the last points of callose deposition (LPCD) pattern, involved in the determination of an adaptive morphological pollen character (aperture pattern). The LPCD pattern exhibits a low level of evolution in eudicots, as compared to the evolution observed in monocots. Stasis in this pattern might be explained by developmental constraints expressed during male meiosis (microsporogenesis) or by selective pressures expressed through the adaptive role of the aperture pattern. Here, we demonstrate that the LPCD pattern is conserved in Euphorbiaceae s.s. and that this conservatism is primarily due to selective pressures. A phylogenetic association was found between the putative removal of selective pressures on pollen morphology after the origin of inaperturate pollen, and the appearance of variation in microsporogenesis and in the resulting LPCD pattern, suggesting that stasis was due to these selective pressures. However, even in a neutral context, variation in microsporogenesis was biased. This should therefore favour the appearance of some developmental and morphological phenotypes rather than others.

show abstract

“…The aperture pattern (number and arrangement) of the pollen grain, one of the major taxonomic divisions of angiosperms, was determined before tetrad formation, so the knowledge of the link between meiosis and aperture pattern determination is a preliminary step toward understanding the genetic basis of development and system evolution of angiosperms (Ressayre et al, 2002). The aperture pattern (number and arrangement) of the pollen grain, one of the major taxonomic divisions of angiosperms, was determined before tetrad formation, so the knowledge of the link between meiosis and aperture pattern determination is a preliminary step toward understanding the genetic basis of development and system evolution of angiosperms (Ressayre et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Formation of membrane‐bound inclusions and their associations with cytoplasmic channels in early prophase male meiocytes of Althaea rosea (L.) Cavan

Luo

Liu

Wang

et al. 2008

Cell Biology International

View full text Add to dashboard Cite

To characterize the cytoplasmic structure reorganization during plant meiosis, the male meiocytes of Althaea rosea (L.) Cavan were examined under the combination of light and electron microscopy. Light microscopic observation of the toluidine blue-stained thick resin sections of young anthers revealed that the meiocytes of sporogenous cell stage were extremely voluminous and variable in shape and division plane. The cell walls (CWs) between some meiocytes were discontinuous at one or several site(s). These discontinuous portions varied between 0.2 and 3.0 microm in length. In addition, it was found that some meiocytes were able to produce protuberances that extended into another meiocyte. When transversally sectioned, the protuberance extending to another cell looked like a small cell lying in another cell. Transmission electron microscopy (TEM) showed that there were many long flat ER cisternae that were actively wrapping around a portion of cytoplasm in the male meiocytes at the sporogenous cell stage. During pre-meiosis interphase and early prophase I, a number of huge (0.5-1.0 microm diameter) spherical membrane-bound inclusions (MBIs) lined by single or double layer(s) of membrane were formed, each membrane actually representing one tightly appressed endoplasmic reticulum (ER) cisterna. The MBIs contained many granular, lamellar and fibrillar structures, and even small MBIs. Moreover, it was found that the MBIs could associate with the cytoplasmic channels (CCs) on CWs to release their contents into the cytoplasm of the opposite cell or directly extend from one cell to another through the CC. Taking all the data together, it is suggested that association of the MBIs and other organelles with CCs possibly functions in eliminating the non-identity of cytoplasm of the male meiocytes caused probably by the random asymmetric division observed at sporogenous cell phase, so as to ensure production of a large number of identical functional male gametes required for successful fertilization.

show abstract

Aperture pattern ontogeny in angiosperms

Cited by 60 publications

References 34 publications

Premeiotic Microsporocyte Cell Shape Influences Shape of Tetrads during Microsporogenesis

Premeiotic Microsporocyte Cell Shape Influences Shape of Tetrads during Microsporogenesis

Evolutionary stasis in Euphorbiaceae pollen: selection and constraints

Formation of membrane‐bound inclusions and their associations with cytoplasmic channels in early prophase male meiocytes of Althaea rosea (L.) Cavan

Contact Info

Product

Resources

About