NDLI: New data about the suspensor of succulent angiosperms: Ultrastructure and cytochemical study of the embryo-suspensor of Sempervivum arachnoideum L. and Jovibarba sobolifera (Sims) Opiz

Content Provider	Springer Nature Link
Author	Kozieradzka Kiszkur, Małgorzata Płach, Bartosz Jan Bohdawicz, Jerzy
Copyright Year	2011
Abstract	The development of the suspensor in two species — Sempervivum arachnoideum and Jovibarba sobolifera — was investigated using cytochemical methods, light and electron microscopy. Cytological processes of differentiation in the embryo-suspensor were compared with the development of embryo-proper. The mature differentiated suspensor consists of a large basal cell and three to four chalazal cells. The basal cell produces haustorial branched invading ovular tissues. The walls of the haustorium and the micropylar part of the basal cell form the wall ingrowths typical for a transfer cells. The ingrowths also partially cover the lateral wall and the chalazal wall separating the basal cell from the other embryo cells. The dense cytoplasm filling the basal cell is rich in: numerous polysomes lying free or covering rough endoplasmic reticulum (RER), active dictyosomes, microtubules, bundles of microfilaments, microbodies, mitochondria, plastids and lipid droplets. Cytochemical tests (including proteins, insoluble polysaccharides and lipids are distributed in the suspensor during different stages of embryo development) showed the presence of high amounts of macromolecules in the suspensor cells, particularly during the globular and heart-shaped phases of embryo development. The protein bodies and lipid droplets are the main storage products in the cells of the embryo-proper. The results of Auramine 0 indicate that a cuticular material is present only on the surface walls of the embryo-proper, but is absent from the suspensor cell wall. The ultrastructural features and cytochemical tests indicate that in the two species — S. arachnoideum and J. sobolifera — the embryo-suspensor is mainly involved in the absorption and transport of metabolites from the ovular tissues to the developing embryo-proper.
Starting Page	613
Ending Page	624
Page Count	12
File Format	PDF
ISSN	0033183X
Journal	Protoplasma
Volume Number	249
Issue Number	3
e-ISSN	16156102
Language	English
Publisher	Springer Vienna
Publisher Date	2011-06-05
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Crassulaceae Cytochemistry Embryo-proper Specialised plastids Suspensor differentiation Ultrastructure Plant Sciences Cell Biology Zoology
Content Type	Text
Resource Type	Article
Subject	Cell Biology Plant Science Medicine

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New data about the suspensor of succulent angiosperms: Ultrastructure and cytochemical study of the embryo-suspensor of Sempervivum arachnoideum L. and Jovibarba sobolifera (Sims) Opiz

New data about the suspensor of succulent angiosperms: Ultrastructure and cytochemical study of the embryo-suspensor of Sempervivum arachnoideum L. and Jovibarba sobolifera (Sims) Opiz

and Jovibarba sobolifera (Sims) Opiz (2011)

Unusual electron-dense dome associates with compound plasmodesmata in the embryo-suspensor of genus Sedum (Crassulaceae)

Are there symplastic connections between the endosperm and embryo in some angiosperms?—a lesson from the Crassulaceae family

Are there symplastic connections between the endosperm and embryo in some angiosperms?—a lesson from the Crassulaceae family

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Ultrastructural and Cytochemical Studies of the Embryo Suspensor of Sedum Reflexum L. (crassulaceae)

New data about the suspensor of succulent angiosperms: Ultrastructure and cytochemical study of the embryo-suspensor of Sempervivum arachnoideum L. and Jovibarba sobolifera (Sims) Opiz

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