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Signaling and Phloem-Mobile Transcripts

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Book cover Short and Long Distance Signaling

Part of the book series: Advances in Plant Biology ((AIPB,volume 3))

Abstract

Numerous studies revealed that beside viral RNAs also plant endogenous RNAs are transported from source tissue towards apical tissues in plants. Surprisingly a high number of distinct transcripts including protein coding and non-coding RNAs were shown to allocate from cell to cell and via the phloem to distant organs. These mobile RNA molecules seem to carry specific structural features allowing them to enter the phloem tissue and to hitchhike on the phloem stream delivering assimilates from mature leaves to apical tissues. Highlighting the signaling role of phloem-allocated RNAs a number of messenger RNAs and micro RNAs have been shown to act as systemic signals altering the shape of growing tissues or to facilitate adaptation to nutritional stresses. The systemic nature of RNAs challenges our classical view on how signaling systems could function. RNA mobility increases the level of complexity and, most importantly, the specificity of a systemic signaling system coordinating growth between cells and organs. In this chapter we discuss the identity and potential function of phloem-allocated RNA molecules, the factors facilitating RNA transport, and the potential role of RNA binding proteins present in the phloem stream.

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Acknowledgment(s)

Work in the lab of R.R.-M. was supported by funds from CONACyT (Grant No. 50769) and UC-MEXUS; FK was supported by the Project P 19682-B03 from the Austrian Science Funds (FWF). Research in the lab of S.W. was supported by the Israel Science Foundation (ISF grant number 386/06).

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Authors and Affiliations

  1. Departamento de Biotecnología y Bioingeniería, Centro De Investigación y de Estudios Avanzados del IPN, México, DF, Mexico

    Roberto Ruiz-Medrano

  2. Max Planck Institute of Molecular Plant Physiology, Golm, Germany

    Friedrich Kragler

  3. The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture and the Otto Warburg Minerva Centre for Agricultural Biotechnology, The Hebrew University of Jerusalem, The Robert H. Smith Faculty of Agriculture Food and Environment, Rehovot, 76100, Israel

    Shmuel Wolf

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  1. Roberto Ruiz-Medrano
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  2. Friedrich Kragler
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  3. Shmuel Wolf
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Correspondence to Friedrich Kragler .

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  1. Zentrum für Molekulare Biologie, Abt. Biochemie und Zellbiologie, Universität Wien, Dr. Bohrgasse 9/5, Wien, 1030, Austria

    Friedrich Kragler

  2. Inst. Botanik, LS Botanik III, Univ. Köln, Gyrhofstr. 15, Köln, 50931, Germany

    Martin Hülskamp

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Ruiz-Medrano, R., Kragler, F., Wolf, S. (2012). Signaling and Phloem-Mobile Transcripts. In: Kragler, F., Hülskamp, M. (eds) Short and Long Distance Signaling. Advances in Plant Biology, vol 3. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-1532-0_7

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