So similar yet so different: The distinct contributions of extrafascicular and fascicular phloem to transport and exudation in cucumber plants

Schnieder, Nadine; Känel, Andrea; Zimmermann, Matthias R.; Kriebs, Katrin; Witte, Antonia; Wrobel, Lisa S.; Twyman, Richard M.; Prüfer, Dirk; Furch, Alexandra C. U.; Noll, Gundula A.

doi:10.1016/j.jplph.2022.153643

Cited by 2 publications

(2 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, CmPP1 and CmPP2, as well as the exudate transcriptome, proteome and metabolome, have been investigated in detail (Clark et al ., 1997; Dinant et al ., 2003; Lin et al ., 2009; Sui et al ., 2018). More recent studies have shown that cucurbit exudates originate mainly from the extrafascicular phloem, which is an additional phloem system unique to the family Cucurbitaceae (Zhang et al ., 2010; Lopez‐Cobollo et al ., 2016; Schnieder et al ., 2022). The extrafascicular phloem probably does not facilitate the transport of photoassimilates (Schnieder et al ., 2022) but may instead play a role in defense similar to the laticifer system of latex‐producing plants (Konno, 2011; Gaupels & Ghirardo, 2013).…”

Section: Nonforisome P‐proteinsmentioning

confidence: 99%

“…More recent studies have shown that cucurbit exudates originate mainly from the extrafascicular phloem, which is an additional phloem system unique to the family Cucurbitaceae (Zhang et al ., 2010; Lopez‐Cobollo et al ., 2016; Schnieder et al ., 2022). The extrafascicular phloem probably does not facilitate the transport of photoassimilates (Schnieder et al ., 2022) but may instead play a role in defense similar to the laticifer system of latex‐producing plants (Konno, 2011; Gaupels & Ghirardo, 2013). Although small amounts of CmPP1 are also found in the sieve elements of the fascicular phloem, the protein is dissimilar to conventional P‐proteins (Clark et al ., 1997).…”

Section: Nonforisome P‐proteinsmentioning

confidence: 99%

See 1 more Smart Citation

Guardians of the phloem – forisomes and beyond

Noll

Furch

Rose³

et al. 2022

New Phytologist

Self Cite

View full text Add to dashboard Cite

The phloem is a highly specialized vascular tissue that forms a fundamentally important transport and signaling pathway in plants. It is therefore a system worth protecting. The main function of the phloem is to transport the products of photosynthesis throughout the whole plant, but it also transports soluble signaling molecules and propagates electrophysiological signals. The phloem is constantly threatened by mechanical injuries, phloem-sucking pests and parasites, and the spread of pathogens, which has led to the evolution of efficient defense mechanisms. One such mechanism involves structural phloem proteins, which are thought to facilitate sieve element occlusion following injury and to defend the plant against pathogens. In leguminous plants, specialized structural phloem proteins known as forisomes form unique mechanoproteins via sophisticated molecular interaction and assembly mechanisms, thus enabling reversible sieve element occlusion. By understanding the structure and function of forisomes and other structural phloem proteins, we can develop a toolbox for biotechnological applications in material science and medicine. Furthermore, understanding the involvement of structural phloem proteins in plant defense mechanisms will allow phloem engineering as a new strategy for the development of crop varieties that are resistant to pests, pathogens and parasites.

show abstract