Note Sur La Structure Et Les Fonctions Du Suspenseur Embryonnaire Chez Quelques Légumineuses

Guignard, Marc

doi:10.1080/00378941.1880.10825895

Cited by 3 publications

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“…In dicots, the suspensor and the endosperm are both short-lived structures that degenerate once they have accomplished their function of nourishing the developing embryo proper. It has been suggested that in species with massive suspensors, such as SRB and common bean, the suspensor takes over endosperm functions, resulting in delayed endosperm cellularization and a decreased amount of endosperm ( Tison, 1919 ; Schnarf, 1929 ; Newman, 1934 ; Lorenzi et al, 1978 ; Guignard, 1880 ). Although there are specific examples that do not support this hypothesis in all plants ( Lersten, 1983 ), it may apply in some cases.…”

Section: What Unique Processes Occur In Giant Bean Suspensors That DImentioning

confidence: 99%

Using giant scarlet runner bean embryos to uncover regulatory networks controlling suspensor gene activity

Henry

Goldberg

2015

Front. Plant Sci.

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One of the major unsolved issues in plant development is understanding the regulatory networks that control the differential gene activity that is required for the specification and development of the two major embryonic regions, the embryo proper and suspensor. Historically, the giant embryo of scarlet runner bean (SRB), Phaseolus coccineus, has been used as a model system to investigate the physiological events that occur early in embryogenesis—focusing on the question of what role the suspensor region plays. A major feature distinguishing SRB embryos from those of other plants is a highly enlarged suspensor containing at least 200 cells that synthesize growth regulators required for subsequent embryonic development. Recent studies have exploited the giant size of the SRB embryo to micro-dissect the embryo proper and suspensor regions in order to use genomics-based approaches to identify regulatory genes that may be involved in controlling suspensor and embryo proper differentiation, as well as the cellular processes that may be unique to each embryonic region. Here we review the current genomics resources that make SRB embryos a compelling model system for studying the early events required to program embryo development.

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Section: What Unique Processes Occur In Giant Bean Suspensors That DImentioning

confidence: 99%

Using giant scarlet runner bean embryos to uncover regulatory networks controlling suspensor gene activity

Henry

Goldberg

2015

Front. Plant Sci.

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“…The shape of mature suspensors is also variable between species; they can be bulbous, such as those of Anthyllis tetraphylla L., filamentous like those of Arabidopsis thaliana or composed of an irregular mass of cells, as has been observed in peanut, Arachis hypogaea (Guignard , Crété , Lersten ). The Crotalaria suspensor has even been shown to have haustorial outgrowths extending into the endosperm and integuments (Rau ).…”

Section: Ultrastructure Of the Suspensormentioning

confidence: 99%

The short and intricate life of the suspensor

Downs

2020

Physiologia Plantarum

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The suspensor is a short‐lived tissue critical for proper embryonic development in many higher plants. While the tissue was initially thought to simply suspend the embryo in the endosperm, it has been found through decades of research that it serves multiple important purposes. The suspensor has been found to be vital for proper embryo patterning and numerous studies have been undertaken into the complex transcriptional cross‐talk between the suspensor and the embryo proper. Indeed, many suspensor mutants also display abnormalities in the embryo. The suspensor's role as a nutrient conduit has been shown using ultrastructural and histochemical techniques. Biochemical approaches have found that the suspensor is a centre of early embryonic hormone production in several species. The suspensor has also been frequently used as a model for programmed cell death as it shows signs of termination almost immediately upon developing. This review covers the essential functions of the suspensor throughout its short existence from multiple disciplines including structural, genetic and biochemical perspectives.

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Suspensors in Leguminosae

Lersten

1983

Bot. Rev

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Note Sur La Structure Et Les Fonctions Du Suspenseur Embryonnaire Chez Quelques Légumineuses

Cited by 3 publications

References 0 publications

Using giant scarlet runner bean embryos to uncover regulatory networks controlling suspensor gene activity

Using giant scarlet runner bean embryos to uncover regulatory networks controlling suspensor gene activity

The short and intricate life of the suspensor

Suspensors in Leguminosae

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