Equal amounts of frozen Mg-deficient or -sufficient leaves from five plants (one plant per pot) were mixed as a biological replicate. Total RNA was extracted from 0.1 g mixed frozen samples using TRIzol reagent (Invitrogen, Carlsbad, CA) following manufacturer's instructions. Mg-deficient and -sufficient leaf sRNA libraries were constructed according to Lu et al. (2014 (link)). Illumina sequencing was performed on a Solexa sequencer at the Beijing Genomics Institute (BGI), Shenzhen, China (Lu et al., 2014 (link)).
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