Facile Labeling of Sieve Element Phloem-Protein Bodies Using the Reciprocal Oligosaccharide Probe OGA488

Azizpor, Pakeeza; Sullivan, Lucy C.; Lim, A L L; Groover, Andrew

doi:10.3389/fpls.2022.809923

Cited by 5 publications

(2 citation statements)

References 31 publications

(48 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Azizpor results provide a new method for rapidly labeling P-protein bodies in sectioned material and raise questions about the significance of carbohydrate binding in the function of P-protein bodies. On the other hand, since these results come from stem sections, they probably do not reflect the native form of P-protein bodies in unwounded tissues [59]. These results failed to label P-proteins from unsectioned Arabidopsis thaliana roots.…”

Section: Proteins In the Heterogeneous Phloem-sapmentioning

confidence: 78%

See 1 more Smart Citation

The Interplay between Enucleated Sieve Elements and Companion Cells

Matilla

2023

Plants

View full text Add to dashboard Cite

In order to adapt to sessile life and terrestrial environments, vascular plants have developed highly sophisticated cells to transport photosynthetic products and developmental signals. Of these, two distinct cell types (i.e., the sieve element (SE) and companion cell) are arranged in precise positions, thus ensuring effective transport. During SE differentiation, most of the cellular components are heavily modified or even eliminated. This peculiar differentiation implies the selective disintegration of the nucleus (i.e., enucleation) and the loss of cellular translational capacity. However, some cellular components necessary for transport (e.g., plasmalemma) are retained and specific phloem proteins (P-proteins) appear. Likewise, MYB (i.e., APL) and NAC (i.e., NAC45 and NAC86) transcription factors (TFs) and OCTOPUS proteins play a notable role in SE differentiation. The maturing SEs become heavily dependent on neighboring non-conducting companion cells, to which they are connected by plasmodesmata through which only 20–70 kDa compounds seem to be able to pass. The study of sieve tube proteins still has many gaps. However, the development of a protocol to isolate proteins that are free from any contaminating proteins has constituted an important advance. This review considers the very detailed current state of knowledge of both bound and soluble sap proteins, as well as the role played by the companion cells in their presence. Phloem proteins travel long distances by combining two modes: non-selective transport via bulk flow and selective regulated movement. One of the goals of this study is to discover how the protein content of the sieve tube is controlled. The majority of questions and approaches about the heterogeneity of phloem sap will be clarified once the morphology and physiology of the plasmodesmata have been investigated in depth. Finally, the retention of specific proteins inside an SE is an aspect that should not be forgotten.

show abstract

Section: Proteins In the Heterogeneous Phloem-sapmentioning

confidence: 78%

“…Finally, Azizpor et al ( 2022) carried out a striking immunological experiment using the reciprocal oligosaccharide probe OGA 488 [59]. This probe created reproducible and highly specific staining of P-protein bodies in poplar, bean and cucumber stems.…”

Section: Proteins In the Heterogeneous Phloem-sapmentioning

confidence: 99%