Dynamic regulation of guard cell anion channels by cytosolic free Ca2+concentration and protein phosphorylation
نویسندگان
چکیده
منابع مشابه
Regulation 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 کاملCytosolic abscisic acid activates guard cell anion channels without preceding Ca2+ signals.
The phytohormone abscisic acid (ABA) reports on the water status of the plant and induces stomatal closure. Guard cell anion channels play a central role in this response, because they mediate anion efflux, and in turn, cause a depolarization-induced K+ release. We recorded early steps in ABA signaling, introducing multibarreled microelectrodes in guard cells of intact plants. Upon external ABA...
متن کاملEffects of Antiproliferative Protein (APP) on Modulation of Cytosolic Protein Phosphorylation of Prostatic Carcinoma Cell Line LNCaP
Antiproliferative protein (APP) isolated from conditioned media of two androgen-independent prostatic carcinoma cell lines, PC3 and Du-145 was shown to inhibit selectively cell proliferation of androgen-dependent prostate cancer cell line LNCaP in a dose dependent manner. This protein was further purified with HPLC using hydrophobic interaction column (phenyl 5PW) and was used to study the modu...
متن کاملStimulus-lnduced Oscillations in Guard Cell Cytosolic Free Calcium
Ca2+ is implicated as a second messenger in the response of stomata to a range of stimuli. However, the mechanism by which stimulus-induced increases in guard cell cytosolic free Ca2+ ([Ca2+],) are transduced into different physiologiCal responses remains to be explained. Oscillations in [Ca2+], may provide one way in which this can occur. We used photometric and imaging techniques to examine t...
متن کاملStimulus-Induced Oscillations in Guard Cell Cytosolic Free Calcium.
Ca2+ is implicated as a second messenger in the response of stomata to a range of stimuli. However, the mechanism by which stimulus-induced increases in guard cell cytosolic free Ca2+ ([Ca2+]i) are transduced into different physiological responses remains to be explained. Oscillations in [Ca2+]i may provide one way in which this can occur. We used photometric and imaging techniques to examine t...
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ژورنال
عنوان ژورنال: The Plant Journal
سال: 2010
ISSN: 0960-7412,1365-313X
DOI: 10.1111/j.1365-313x.2009.04108.x