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Fig. 7 | BMC Plant Biology

Fig. 7

From: Analysis of a novel mutant allele of GSL8 reveals its key roles in cytokinesis and symplastic trafficking in Arabidopsis

Fig. 7

Proposed model of callose deposition regulation at plasmodesmata. GSL8 (possibly GSL10 as well) catalyzes the synthesis of callose that is deposited at the neck of plasmodesmata. UDP-Glc is the callose precursor that is released from sucrose hydrolysis by SUS1 with the help of UDPG, and then channeled to GSL8 through the GSL8-SUS1 physical interaction. Conversely, there is another family of proteins including AtBG_PPAP that degrade callose. The GSL8-AtBG interaction observed in this work suggests a direct synthesizer-degrader interaction to control the deposition level of callose at plasmodesmata through an as yet unknown mechanism, which might involve PDLP5. This highly regulated callose deposition at plasmodesmata allows the proper symplastic movement of SHR and miR165/6 during development

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BMC Plant Biology

ISSN: 1471-2229

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