With the unrest in Egypt continuing over the weekend, the Egyptian Museum in Cairo is now "under military guard" (AP) in response to an attempted looting late Friday.
Together, the data suggest that AHK5 acts to maintain H2O2/redox homeostasis in guard cells in response to multiple stimuli.
A key signalling molecule produced in guard cells in response to plant hormones, light, carbon dioxide and pathogen-derived signals is hydrogen peroxide (H2O2).
Generation of H2O2 in guard cells in response to ABA and darkness occurs via the NADPH oxidase orthologues ATRBOHD and ATRBOHF ([13] and this study).
Using a combination of molecular genetic, cell imaging, biochemical and physiological tools, we show that AHK5 is a key player in H2O2 homeostasis in Arabidopsis guard cells in response to environmental and endogenous signals, including NO, ethylene, darkness and bacterial flagellin.
ABAleon2.1 enabled the rapid detection of ABA concentration changes in guard cells in response to a humidity drop and the visualization of long term ABA accumulation in response to salt in guard cells and in response to salt- and osmotic stress in roots.
In particular, AtMYB60 has been shown to be differentially expressed in guard cells in response to ABA, and the loss-of function atmyb60-1 mutant displays constitutive reduction of light-induced stomatal opening and enhanced tolerance to dehydration [ 10].
Funding for the venue security budget is likely to rise from £282m to £553m but the government said the increase in numbers of security guards was "not in response to any specific security threat".
Mark Kelly, husband of former Rep. Gabrielle Giffords (D-Ariz)., said Monday that the National Rifle Association was mischaracterizing the issue of gun control and promoting a misguided plan to place armed guards in schools in response to the December mass shooting in Newtown, Conn.
The New York Times' publisher A.G. Sulzberger told Trump during a meeting last month that the outlet had placed armed security guards outside its offices in response to an increase in threats against reporters.
