دورية أكاديمية
Sphingolipid biosynthesis modulates plasmodesmal ultrastructure and phloem unloading
| العنوان: | Sphingolipid biosynthesis modulates plasmodesmal ultrastructure and phloem unloading |
|---|---|
| المؤلفون: | Yan, Dawei, Yadav, Shri Ram, Paterlini, Andrea, Nicolas, William J, Petit, Jules D, Brocard, Lysiane, Belevich, Ilya, Grison, Magali S, Vaten, Anne, Karami, Leila, el-Showk, Sedeer, Lee, Jung-Youn, Murawska, Gosia M, Mortimer, Jenny, Knoblauch, Michael, Jokitalo, Eija, Markham, Jennifer E, Bayer, Emmanuelle M, Helariutta, Ykä |
| المصدر: | Nature Plants, vol 5, iss 6 |
| بيانات النشر: | eScholarship, University of California |
| سنة النشر: | 2019 |
| المجموعة: | University of California: eScholarship |
| مصطلحات موضوعية: | Biochemistry and Cell Biology, Biological Sciences, Arabidopsis, Arabidopsis Proteins, Genes, Plant, Glucans, Green Fluorescent Proteins, Membrane Proteins, Mutation, Phloem, Plant Roots, Plasmodesmata, Sphingolipids, Transferases (Other Substituted Phosphate Groups), q-bio.SC, Plant Biology, Crop and Pasture Production, Ecology |
| جغرافية الموضوع: | 604 - 615 |
| الوصف: | During phloem unloading, multiple cell-to-cell transport events move organic substances to the root meristem. Although the primary unloading event from the sieve elements to the phloem pole pericycle has been characterized to some extent, little is known about post-sieve element unloading. Here, we report a novel gene, PHLOEM UNLOADING MODULATOR (PLM), in the absence of which plasmodesmata-mediated symplastic transport through the phloem pole pericycle-endodermis interface is specifically enhanced. Increased unloading is attributable to a defect in the formation of the endoplasmic reticulum-plasma membrane tethers during plasmodesmal morphogenesis, resulting in the majority of pores lacking a visible cytoplasmic sleeve. PLM encodes a putative enzyme required for the biosynthesis of sphingolipids with very-long-chain fatty acid. Taken together, our results indicate that post-sieve element unloading involves sphingolipid metabolism, which affects plasmodesmal ultrastructure. They also raise the question of how and why plasmodesmata with no cytoplasmic sleeve facilitate molecular trafficking. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | unknown |
| العلاقة: | qt89k9s87h; https://escholarship.org/uc/item/89k9s87hTest |
| الإتاحة: | https://escholarship.org/uc/item/89k9s87hTest |
| حقوق: | public |
| رقم الانضمام: | edsbas.7BB19C0 |
| قاعدة البيانات: | BASE |
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