cDNA

RCH1:HDT1,HDT2-RNAi

108446

RCH1:HDT1,HDT2-RNAi

Spectinomycin

Full sequence is not available for this plasmid. Please see the diagnostic digest and partial sequencing results as references for verification To build the pRCH1:HDT1HDT2 RNAi construct (hdt1,2i), the CaMV 35S promoter in pK7GWIWG2 vector (Limpens et al., 2005) was replaced with RCH1 promoter [pK7GWIWG2(II)]. The RCH1 promoter was first amplified on genomic DNA and cloned into pENTR-D-TOPO. Then it was cut out from the vector by HindIII (partial digestion) and XbaI and recombined with two fragments of the pK7GWIWG2(II) vector in a three-point ligation. The two fragments of pK7GWIWG2(II) vector were obtained by digestion either with HindII and NcoI, or with SpeI (compatible with XbaI) and HindIII. The whole RNAi cassette including the RCH1 promoter was cut out from the vector using ApaI and HindIII and ligated into the pBnRGW binary vector digested with the same enzymes and in such way creating pBnRRGWIWG vector. The RNAi target sequences of HDT1 and HDT2 coding sequences (0.6 kb for each) were combined in one amplicon using a two-step PCR, following the procedure described by Franssen et al. (2015). In brief, the first step PCRs introduced short overlaps (15 bp) in PCR fragments of HDT1 and HDT2 coding sequences with HDT1rnai-F and HDT1rnai-R primers, or with HDT2rnai-F and HDT2rnai-R primers. These two fragments were used as templates in the second-step PCR with HDT1rnai-F and HDT2rnai-R primers. The final PCR fragment was introduced into pENTR-D-TOPO vector and recombined in inverse-repeat orientation into the pBnRRGWIWG binary vector by a LR Gateway reaction (Invitrogen).

Arabidopsis transformation, RNAi vector targeting HDT1/HDT2 with RCH1 promoter

37

Low Copy