Distinct Light and Clock Modulation of Cytosolic Free Ca2+ Oscillations and Rhythmic CHLOROPHYLL A/B BINDING PROTEIN2 Promoter Activity in Arabidopsis Export

@article{citeulike:3404074, abstract = {Plants have circadian oscillations in the concentration of cytosolic free calcium ([Ca2+]cyt). To dissect the circadian Ca2+-signaling network, we monitored circadian [Ca2+]cyt oscillations under various light/dark conditions (including different spectra) in Arabidopsis thaliana wild type and photoreceptor and circadian clock mutants. Both red and blue light regulate circadian oscillations of [Ca2+]cyt. Red light signaling is mediated by PHYTOCHROME B (PHYB). Blue light signaling occurs through the redundant action of CRYPTOCHROME1 (CRY1) and CRY2. Blue light also increases the basal level of [Ca2+]cyt, and this response requires PHYB, CRY1, and CRY2. Light input into the oscillator controlling [Ca2+]cyt rhythms is gated by EARLY FLOWERING3. Signals generated in the dark also regulate the circadian behavior of [Ca2+]cyt. Oscillations of [Ca2+]cyt and CHLOROPHYLL A/B BINDING PROTEIN2 (CAB2) promoter activity are dependent on the rhythmic expression of LATE ELONGATED HYPOCOTYL and CIRCADIAN CLOCK-ASSOCIATED1, but [Ca2+]cyt and CAB2 promoter activity are uncoupled in the timing of cab1 (toc1-1) mutant but not in toc1-2. We suggest that the circadian oscillations of [Ca2+]cyt and CAB2 promoter activity are regulated by distinct oscillators with similar components that are used in a different manner and that these oscillators may be located in different cell types in Arabidopsis. 10.1105/tpc.106.046011}, author = {Xu, Xiaodong and Hotta, Carlos T. and Dodd, Antony N. and Love, John and Sharrock, Robert and Lee, Young W. and Xie, Qiguang and Johnson, Carl H. and Webb, Alex A.}, citeulike-article-id = {3404074}, citeulike-linkout-0 = {http://dx.doi.org/10.1105/tpc.106.046011}, citeulike-linkout-1 = {http://www.plantcell.org/cgi/content/abstract/19/11/3474}, citeulike-linkout-2 = {http://view.ncbi.nlm.nih.gov/pubmed/17982000}, citeulike-linkout-3 = {http://www.hubmed.org/display.cgi?uids=17982000}, day = {1}, doi = {10.1105/tpc.106.046011}, journal = {Plant Cell}, keywords = {arabidopsis, ca, circadian\_clock, light\_sensing}, month = {November}, number = {11}, pages = {3474--3490}, posted-at = {2008-10-14 12:11:38}, priority = {4}, title = {Distinct Light and Clock Modulation of Cytosolic Free Ca2+ Oscillations and Rhythmic CHLOROPHYLL A/B BINDING PROTEIN2 Promoter Activity in Arabidopsis}, url = {http://dx.doi.org/10.1105/tpc.106.046011}, volume = {19}, year = {2007} }

TY - JOUR ID - citeulike:3404074 L3 - citeulike-article-id:3404074 N2 - Plants have circadian oscillations in the concentration of cytosolic free calcium ([Ca2+]cyt). To dissect the circadian Ca2+-signaling network, we monitored circadian [Ca2+]cyt oscillations under various light/dark conditions (including different spectra) in Arabidopsis thaliana wild type and photoreceptor and circadian clock mutants. Both red and blue light regulate circadian oscillations of [Ca2+]cyt. Red light signaling is mediated by PHYTOCHROME B (PHYB). Blue light signaling occurs through the redundant action of CRYPTOCHROME1 (CRY1) and CRY2. Blue light also increases the basal level of [Ca2+]cyt, and this response requires PHYB, CRY1, and CRY2. Light input into the oscillator controlling [Ca2+]cyt rhythms is gated by EARLY FLOWERING3. Signals generated in the dark also regulate the circadian behavior of [Ca2+]cyt. Oscillations of [Ca2+]cyt and CHLOROPHYLL A/B BINDING PROTEIN2 (CAB2) promoter activity are dependent on the rhythmic expression of LATE ELONGATED HYPOCOTYL and CIRCADIAN CLOCK-ASSOCIATED1, but [Ca2+]cyt and CAB2 promoter activity are uncoupled in the timing of cab1 (toc1-1) mutant but not in toc1-2. We suggest that the circadian oscillations of [Ca2+]cyt and CAB2 promoter activity are regulated by distinct oscillators with similar components that are used in a different manner and that these oscillators may be located in different cell types in Arabidopsis. 10.1105/tpc.106.046011 IS - 11 JF - Plant Cell EP - 3490 TI - Distinct Light and Clock Modulation of Cytosolic Free Ca2+ Oscillations and Rhythmic CHLOROPHYLL A/B BINDING PROTEIN2 Promoter Activity in Arabidopsis VL - 19 SP - 3474 KW - arabidopsis KW - ca KW - circadian_clock KW - light_sensing AU - Xu, Xiaodong AU - Hotta, Carlos AU - Dodd, Antony AU - Love, John AU - Sharrock, Robert AU - Lee, Young AU - Xie, Qiguang AU - Johnson, Carl AU - Webb, Alex PY - 2007/11/01/ UR - http://dx.doi.org/10.1105/tpc.106.046011 ER -