Abstract:Numerous structural and preparative challenges in observing the phloem have strongly influenced interpretations of the events that lead to sieve tube occlusion. This chapter summarizes the current kno...Numerous structural and preparative challenges in observing the phloem have strongly influenced interpretations of the events that lead to sieve tube occlusion. This chapter summarizes the current knowledge of mechanisms that exist to prevent nutrient loss from the sieve tube system after injury, with a focus on biotic and abiotic factors that lead to a mechanical disruption. Callose is a β-1,3 glucan with widespread distribution in higher plants and is most often associated with cellular events as well as structural components such as plasmodesmata, cell walls, and sieve plates of the phloem. As callose genes encode for callose synthesizing proteins, callose synthase (CalS) serves as the primary designation in this chapter. The description of sieve element occlusion (SEO) genes, which encode forisome proteins, might provide a starting point to identify the building blocks of phloem proteins (P-proteins) in other plant families, since SEO-related genes have been identified in various angiosperms.Read More
Publication Year: 2012
Publication Date: 2012-08-28
Language: en
Type: other
Indexed In: ['crossref']
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Cited By Count: 9
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