NDH shuttles electrons from NAD(P)H:plastoquinone, via FMN and iron-sulfur (Fe-S) centers, to quinones in the photosynthetic chain and possibly in a chloroplast respiratory chain. The immediate electron acceptor for the enzyme in this species is believed to be plastoquinone. Couples the redox reaction to proton translocation, and thus conserves the redox energy in a proton gradient (Probable). Required for the efficient operation of ferredoxin-dependent plastoquinone reduction. Forms the electron donor-binding subcomplex in association with the NDHT and NDHU subunits (PubMed:21505067, PubMed:24225949). a plastoquinone + (n+1) H(+)(in) + NADH = a plastoquinol + n H(+)(out) + NAD(+) a plastoquinone + (n+1) H(+)(in) + NADPH = a plastoquinol + n H(+)(out) + NADP(+) Part of the chloroplast NDH complex, composed of a mixture of chloroplast and nucleus encoded subunits (PubMed:21785130). Component of the electron donor-binding subcomplex, at least composed of NDHS, NDHT and NDHU. Interacts with the NDH subcomplex A via the protein NDHT and NDHU (PubMed:21505067, PubMed:24225949). Arg-193 is the critical site for the high affinity binding of NDH to ferredoxin. Malfunction of the NDH complex.