title: Suppression of Arabidopsis flowering by near-null magnetic field is affected by light.
abstract: We previously reported that a near-null magnetic field suppressed Arabidopsis flowering in white light, which might be related to the function modification of cryptochrome (CRY). To further demonstrate that the effect of near-null magnetic field on Arabidopsis flowering is associated with CRY, Arabidopsis wild type and CRY mutant plants were grown in the near-null magnetic field under blue or red light with different light cycle and photosynthetic photon flux density. We found that Arabidopsis flowering was significantly suppressed by near-null magnetic field in blue light with lower intensity (10 µmol/m(2) /s) and shorter cycle (12 h period: 6 h light/6 h dark). However, flowering time of CRY1/CRY2 mutants did not show any difference between plants grown in near-null magnetic field and in local geomagnetic field under detected light conditions. In red light, no significant difference was shown in Arabidopsis flowering between plants in near-null magnetic field and local geomagnetic field under detected light cycles and intensities. These results suggest that changes of blue light cycle and intensity alter the effect of near-null magnetic field on Arabidopsis flowering, which is mediated by CRY.
authors.affiliation: Beijing Key Laboratory of Bioelectromagnetism, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing, China.
authors.forename: Chunxiao
authors.initials: C
authors.lastname: Xu
authors.affiliation: Beijing Key Laboratory of Bioelectromagnetism, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing, China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Li
authors.affiliation: Beijing Key Laboratory of Bioelectromagnetism, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Yu
authors.affiliation: Beijing Key Laboratory of Bioelectromagnetism, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing, China.
authors.forename: Yuxia
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Beijing Key Laboratory of Bioelectromagnetism, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing, China.
authors.forename: Shufeng
authors.initials: S
authors.lastname: Wei
mesh_terms: D017360:Arabidopsis / Q000254:growth & development* / Q000378:metabolism / Q000528:radiation effects*; D029681:Arabidopsis Proteins / Q000378:metabolism; D056931:Cryptochromes / Q000378:metabolism; D035264:Flowers / Q000254:growth & development* / Q000528:radiation effects*; D008027:Light; D060526:Magnetic Fields; D013997:Time Factors
chemical_list: D029681:Arabidopsis Proteins; D056931:Cryptochromes
keywords: blue light; cryptochrome; light cycle; light intensity; red light