Tobacco guard cells fix CO2by both Rubisco and PEPcase while sucrose acts as a substrate during light-induced stomatal opening
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چکیده
منابع مشابه
Light-dependent Influx and Efflux of Potassium of Guard Cells during Stomatal Opening and Closing.
Stomata in epidermal strips of Vicia faba opened in light and closed in darkness when floated on dilute K(+) solutions. Opening and closing, respectively, paralleled the fluxes of labeled K(+) into and out of the strips. The gain and loss of K(+) by the strips were shown by colbaltinitrite stain to be centered at guard cells. Intact epidermal cells, however, appeared to take up K(+), complicati...
متن کاملThe Arabidopsis small G protein ROP2 is activated by light in guard cells and inhibits light-induced stomatal opening.
ROP small G proteins function as molecular switches in diverse signaling processes. Here, we investigated signals that activate ROP2 in guard cells. In guard cells of Vicia faba expressing Arabidopsis thaliana constitutively active (CA) ROP2 fused to red fluorescent protein (RFP-CA-ROP2), fluorescence localized exclusively at the plasma membrane, whereas a dominant negative version of RFP-ROP2 ...
متن کاملBlue Light Induces a Distinct Starch Degradation Pathway in Guard Cells for Stomatal Opening
Stomatal pores form a crucial interface between the leaf mesophyll and the atmosphere, controlling water and carbon balance in plants [1]. Major advances have been made in understanding the regulatory networks and ion fluxes in the guard cells surrounding the stomatal pore [2]. However, our knowledge on the role of carbon metabolism in these cells is still fragmentary [3-5]. In particular, the ...
متن کاملStomatal Opening Involves Polar, Not Radial, Stiffening Of Guard Cells
It has long been accepted that differential radial thickening of guard cells plays an important role in the turgor-driven shape changes required for stomatal pore opening to occur [1-4]. This textbook description derives from an original interpretation of structure rather than measurement of mechanical properties. Here we show, using atomic force microscopy, that although mature guard cells dis...
متن کاملLight-Induced Stomatal Opening Is Affected by the Guard Cell Protein Kinase APK1b
Guard cells allow land plants to survive under restricted or fluctuating water availability. They control the exchange of gases between the external environment and the interior of the plant by regulating the aperture of stomatal pores in response to environmental stimuli such as light intensity, and are important regulators of plant productivity. Their turgor driven movements are under the con...
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ژورنال
عنوان ژورنال: Plant, Cell & Environment
سال: 2015
ISSN: 0140-7791
DOI: 10.1111/pce.12555