منابع مشابه
Guard cells
What are guard cells? A pair of guard cells surrounds each stoma on the leaf surface. Stomata are important because they regulate the uptake of CO 2 from the atmosphere for photosynthesis and also the loss of water vapour from the plant during transpiration. The aperture of the stomatal pore is controlled by the two guard cells. When the guard cells are fully turgid the pore gapes open, whereas...
متن کاملSignalling drought in guard cells.
A number of environmental conditions including drought, low humidity, cold and salinity subject plants to osmotic stress. A rapid plant response to such stress conditions is stomatal closure to reduce water loss from plants. From an external stress signal to stomatal closure, many molecular components constitute a signal transduction network that couples the stimulus to the response. Numerous s...
متن کاملApoptotic cells let down their guard
Unfolding chromatin nets Spiderman doesn’t have anything on neutrophils, which snag microscopic bad guys with webs of chromatin. Wang et al. show that by unfurling chromatin, a histone-modifying protein helps the defensive cells set their traps. During an infection or infl ammation, dying neutrophils spill their DNA to form pathogentrapping NETs (neutrophil extracellular traps). This gooey mate...
متن کاملGuard Cells: Transcription Factors Regulate Stomatal Movements
Recent work shows that transcription factors are necessary for stomatal movements in plants. Different members of the plant-specific R2R3-MYB transcription factor family are required for mediating stomatal opening in response to light and stomatal closure in response to darkness.
متن کاملGuard cells: a dynamic signaling model.
The year 2003 has provided a continuing accretion of knowledge concerning the diverse ways in which guard cells sense and respond to abscisic acid. A deeper understanding of the biochemical mechanisms governing the response of guard cells to blue light has been gained, and new insights have been garnered regarding roles of the extracellular matrix in stomatal regulation.
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ژورنال
عنوان ژورنال: Current Biology
سال: 2001
ISSN: 0960-9822
DOI: 10.1016/s0960-9822(01)00358-x