Guard Cell Signaling

TL;DR: This review describes the abiotic and biotic stresses and current developing methods for the acclimatization of microshoots, focused on the control of both physical and chemical environment and biohardening of micropropagated plantlets.

TL;DR: Despite the missing unifying concept, it is becoming clear that ABA action enforces a sophisticated regulation at all levels.

TL;DR: Successful purification of OST1 produced in Escherichia coli is reported, and site-directed mutagenesis and serial deletions reveal that serine (Ser)-175 in the activation loop and the SnRK2-specific box are critical for the activity of recombinant O ST1 kinase.

TL;DR: The antisense inhibition of the iron-sulphur subunit of succinate dehydrogenase in tomato increases photosynthesis and biomass via an organic acid–mediated effect on stomatal aperture, which reinforces earlier suggestions that malate plays a crucial role inStomatal opening and supports the hypothesis that stomatic function can be regulated remotely via mesophyll-generated cues.

TL;DR: Activation of Ca2+-permeable channels in the plasma membrane of Arabidopsis guard cells by hydrogen peroxide indicates that ABA-induced H2O2 production and the H 2O 2-activated Ca2-activated channels are important mechanisms for A BA-induced stomatal closing.

TL;DR: Examination of stomatal guard cells of Arabidopsis provides evidence that supports a model in which stomata, as part of an integral innate immune system, act as a barrier against bacterial infection.

TL;DR: It is suggested, using computer simulations, that the Drosophila segment polarity genes constitute a module, and that this module is resistant to variations in the kinetic constants that govern its behaviour.

TL;DR: Results suggest that OST1 acts in the interval between ABA perception and ROS production, and the relative positions of ost1 and the other ABA-insensitive mutations in the ABA signaling network (abi1-1, abi2-1 and gca2) are discussed.