1 Role-Playing to Train Guards In response to the prisoner-abuse scandal at Abu Ghraib, the Army is taking lessons learned from combat zones to train its security forces for guard duty at American detention centers in Iraq, Afghanistan and Guantánamo Bay, Cuba.
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.
Multidisciplinary approaches including histochemical, pharmacological, fluorescent, electrochemical, and molecular biological methods were used to discuss the relationship of hydrogen peroxide (H(2 O(2)) and nitric oxide (NO) signalling in the CAS signalling pathway in guard cells in response to Ca(2+)(o).
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.
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].
