Plant germline formation: common concepts and developmental flexibility in sexual and asexual reproduction
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TLDR
New insights into the genetic basis and molecular mechanisms underlying plant germline development in sexual and asexual species are discussed.Abstract:
The life cycle of flowering plants alternates between two heteromorphic generations: a diploid sporophytic generation and a haploid gametophytic generation. During the development of the plant reproductive lineages - the germlines - typically, single sporophytic (somatic) cells in the flower become committed to undergo meiosis. The resulting spores subsequently develop into highly polarized and differentiated haploid gametophytes that harbour the gametes. Recent studies have provided insights into the genetic basis and regulatory programs underlying cell specification and the acquisition of reproductive fate during both sexual reproduction and asexual (apomictic) reproduction. As we review here, these recent advances emphasize the importance of transcriptional, translational and post-transcriptional regulation, and the role of epigenetic regulatory pathways and hormonal activity.read more
Citations
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Journal ArticleDOI
DNA demethylation is initiated in the central cells of Arabidopsis and rice
Kyunghyuk Park,M. Yvonne Kim,Martin Vickers,Jin-Sup Park,Youbong Hyun,Takashi Okamoto,Daniel Zilberman,Robert L. Fischer,Xiaoqi Feng,Yeonhee Choi,Stefan Scholten +10 more
TL;DR: In this article, a genome-wide analysis of DNA methylation in the central cells of Arabidopsis and rice, as well as in rice egg cells, was performed, and it was shown that DNA demethylation in both species is initiated in central cells, which requires DEMETER.
Journal ArticleDOI
Next generation breeding.
Delfina Barabaschi,Alessandro Tondelli,Francesca Desiderio,Andrea Volante,Patrizia Vaccino,Giampiero Valè,Luigi Cattivelli +6 more
TL;DR: This review illustrates how next generation sequencing-derived information can be used to tailor genomic tools for different breeders' needs to revolutionize crop improvement.
Journal ArticleDOI
The Rise of Apomixis in Natural Plant Populations
Diego Hojsgaard,Elvira Hörandl +1 more
TL;DR: The state of knowledge on origin, establishment and maintenance of natural apomixis is reviewed to consider the potential risks of pollen transfer and introgression into sexual crop fields, which might be overcome by using pollen-sterile or cleistogamous variants.
Journal ArticleDOI
Cellular, Molecular, and Physiological Aspects of In Vitro Plant Regeneration.
TL;DR: A review of past studies suggests that regeneration in plants involves the reprogramming of distinct somatic cells, while in others, it is induced by the activation of relatively undifferentiated cells in somatic tissues.
Journal ArticleDOI
Gametophytic Pollen Tube Guidance: Attractant Peptides, Gametic Controls, and Receptors.
Tetsuya Higashiyama,Wei-Cai Yang +1 more
TL;DR: Recent progress in the understanding of the mechanism of gametophytic pollen tube guidance is reviewed, including attraction by synergid cells, control of pollen tubes guidance by female gametes, and directional growth of the pollen tube by directional cue sensing.
References
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Journal ArticleDOI
Two-component circuitry in Arabidopsis cytokinin signal transduction
Ildoo Hwang,Jen Sheen +1 more
TL;DR: A eukaryotic two-component signalling circuit that initiates cytokinin signalling through distinct hybrid histidine protein kinase activities at the plasma membrane is identified.
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Apomixis in Plants
Sven E. Asker,Lenn Jerling +1 more
TL;DR: This review focuses on the development of Apomixis and its applications in Sexual Plants and Polyploidy, as well as on the models used in Embryology and Cytology for Gene Regulation.