Regulation of stomatal opening by the guard cell expansinAtEXPA1
نویسندگان
چکیده
منابع مشابه
Light-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...
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 کاملRegulation of abscisic acid-induced stomatal closure and anion channels by guard cell AAPK kinase.
Abscisic acid (ABA) stimulates stomatal closure and thus supports water conservation by plants during drought. Mass spectrometry-generated peptide sequence information was used to clone a Vicia faba complementary DNA, AAPK, encoding a guard cell-specific ABA-activated serine-threonine protein kinase (AAPK). Expression in transformed guard cells of AAPK altered by one amino acid (lysine 43 to al...
متن کاملAction Spectra for Guard Cell Rb Uptake and Stomatal Opening in Vivia faba.
Abaxial epidermal strips, containing guard cells as the only viable cells, were prepared from leaves of Vicia faba following a period in darkness, and floated, under CO(2)-free air, on 2 mm RbCl + 0.1 mm CaCl(2) labeled with (86)Rb(+). Under white light (high pressure mercury vapor lamp), stomatal opening in these strips approached its maximum at less than 0.02 calorie per square centimeter per...
متن کاملGuard Cell Chloroplasts Are Essential for Blue Light-Dependent Stomatal Opening in Arabidopsis
Blue light (BL) induces stomatal opening through the activation of H+-ATPases with subsequent ion accumulation in guard cells. In most plant species, red light (RL) enhances BL-dependent stomatal opening. This RL effect is attributable to the chloroplasts of guard cell, the only cells in the epidermis possessing this organelle. To clarify the role of chloroplasts in stomatal regulation, we inve...
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ژورنال
عنوان ژورنال: Plant Signaling & Behavior
سال: 2011
ISSN: 1559-2324
DOI: 10.4161/psb.6.5.15144