期刊
NEW PHYTOLOGIST
卷 198, 期 1, 页码 33-51出版社
WILEY
DOI: 10.1111/nph.12167
关键词
FT protein; grafting; phloem; silencing; small RNA; systemic; xylem
资金
- Biotechnology and Biological Sciences Research Council (BBSRC) [BB/I021930/1]
- BBSRC [BB/I021930/1] Funding Source: UKRI
- Biotechnology and Biological Sciences Research Council [BB/I021930/1] Funding Source: researchfish
33 I. 33 II. 34 III. 37 IV. 39 V. 40 VI. 43 VII. 45 46 References 46 Summary The two major vascular conduits in plants, the xylem and phloem, theoretically provide opportunities for the long-distance translocation of almost any type of water-borne molecule. This review focuses on the signalling functions conveyed by the movement of macromolecules. Here, a signal is defined as the communication of information from source to destination, where it modifies development, physiology or defence through altered gene expression or by direct influences on other cellular processes. Xylem and phloem sap both contain diverse classes of proteins; in addition, phloem contains many full-length and small RNA species. Only a few of these mobile molecules have proven functions in signalling. The transduction of signals typically depends on connection to appropriate signalling pathways. Incoming protein signals require specific detection systems, generally via receptors. Mobile RNAs require either the translation or presence of a homologous target. Given that phloem sieve elements are enucleate and lack translation machinery, RNA function requires subsequent unloading at least into adjacent companion cells. The binding of RNA by proteins in ribonucleoprotein complexes enables the translocation of some signals, with evidence for both sequence-specific and size-specific binding. Several examples of long-distance macromolecular signalling are highlighted, including the FT protein signal which regulates flowering time and other developmental switches.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据