05 اردیبهشت 1403
ليلا كرمي

لیلا کرمی

مرتبه علمی: استادیار
نشانی: دانشکده مهندسی کشاورزی - گروه علوم و مهندسی باغبانی
تحصیلات: دکترای تخصصی / زیست شناسی علوم گیاهی
تلفن: 09173767604
دانشکده: دانشکده مهندسی کشاورزی

مشخصات پژوهش

عنوان Sphingolipid biosynthesis modulates plasmodesmal ultrastructure and phloem unloading
نوع پژوهش مقالات در نشریات
کلیدواژه‌ها
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مجله Nature Plants
شناسه DOI
پژوهشگران Dawei Yan (نفر اول) ، Shri Ram Yadav (نفر دوم) ، Andrea Paterlin (نفر سوم) ، William J Nicolas (نفر چهارم) ، Jules D. Petit (نفر پنجم) ، Ilya Belevich (نفر ششم به بعد) ، Lysiane Brocard (نفر ششم به بعد) ، لیلا کرمی (نفر ششم به بعد) ، Anne Vaten (نفر ششم به بعد) ، Magali S. Grison Grison (نفر ششم به بعد)

چکیده

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.