Newly discovered regulation process explains plant development

phys.org | 6/7/2018 | Staff
Caris (Posted by) Level 3
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Vascular tissue in plants distributes water and nutrients, thereby ensuring constant growth. Each new cell needs to develop into its respective cell type in the vascular tissue. A team at the Technical University of Munich (TUM) has now discovered how these cells know which cell type they should develop into.

During growth, plants constantly form new leaves, branches and roots over weeks, months and years. These are initially formed via cell division, during which cells develop in highly complex, yet orderly processes. One result of these developmental programs is the vascular tissue of the plants, which is visible to the human eye in the form of leaf veins. Vascular tissue pervades the entire plant body, supplying the plant with water and salts from the ground via the xylem, and with metabolic products such as sugars from photosynthesis via the phloem.

Cell - Example - Phloem - Cell - Professor

"But how does a newly formed cell know that it should become, for example, a phloem cell?" asks Professor Claus Schwechheimer from the Chair of Plant Systems Biology and co-author of the study. "To answer this question, we conducted research over many years in collaboration with our colleagues from Lausanne." The way in which this mechanism works in plants has now been described by these researchers in the latest issue of Nature.

How does a cell become a phloem cell?

Team - Lausanne - Plants - Protein - BRX

"Back in 2009, the team in Lausanne demonstrated that plants lacking a certain protein (BRX) have problems forming phloem cells," states co-author Lanassa Bassukas from the TUM. "At the same time, they also observed that it has a highly sensitive response to the plant hormone auxin. Depending on whether the auxin value was low or high, the protein...
(Excerpt) Read more at: phys.org
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