Research of Arabidopsis miR172a-1/b-2/c in Response to Multiple Stresses
microRNA172 mediates photoperiodic flowering in Arabidopsis and its targets are APETALA2-Like genes. Overexpression of miR172 results in early flowering. Although environmental stress causes the promotion of flowering, whether miR172 is involved in the flowering time under stress condition is unknown. The promoter regions of miR172 members all contain many different stress-responsive cis-acting elements. Semi-quantitative reverse transcription-PCR(RT-PCR) analysis indicates that mannitol or LiCl induces the expression of miR172a-l. The overexpression of miR172a-l or miR172b-2 leads to more lateral roots, but there is no growth suppression comopared with the wild type. This implicates that they are involved in different stess responses respectively. RT-PCR and electrical conductivity analyses suggest that miR172 is induced under drought condition.
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NSTL
万方数据
维普
