Up till now the majority of the studies focussed on the response to karrakin(-like) and how plants regulate this. But hormone response is often held in check by negative feedback loops. Now a new study by a group of international researchers focused on this negative feedback loop.
Tag Archives: Engels
Pumping up cells
Plants lift up their leaves in crowded environments, so they can capture more light. While researchers know a lot of how plants do this, what causes cells to grow, which is needed for this response, is unclear. Now a group of international researchers show that the potassium channel AKT5 pumps in K+ ions into the cell, subsequently promoting the cell to expand.
Linking defence responses
Upon wounding a Ca2+ signal travels from the wound through the plant. In each cell the signal passes through the defence response gets activated. Now a new study from German researchers shows that two plastid located ion channels form a missing link in how Ca2+ activates the biosynthesis of jasmonic acid, one of the plant hormones that coordinate the defence response.
Manipulating insects
Herbivory insects manage to influence the stomata opening of the plant they feed on. Most do this to keep the stomata closed so they minimise the release of volatile organic compounds. These scent molecules are after all responsible for attracting the enemies; predatory insects. But the tomato leafminer (Phthorimaea absoluta) does the opposite. It forces the stomata open and uses the released benzaldehyde as a cue that it is best to lay its eggs on an uninfested plant a new study found.
Plant en Zo 