The HKT family of Na(+) and Na(+)/K(+) transporters is implicated in plant salinity tolerance. Amongst these transporters, the cereal HKT1;4 and HKT1;5 are responsible for Na(+) exclusion from photosynthetic tissues, a key mechanism for plant salinity tolerance. It has been suggested that Na(+) is retrieved from the xylem transpiration stream either in the root or the leaf sheath, protecting th...

Nonsense-mediated mRNA decay (NMD) represents a phylogenetically widely conserved splicingand translation-dependent mechanism that eliminates transcripts with premature translation stop codons and suppresses the accumulation of C-terminally truncated peptides. Elimination of frameshifted transcripts that result from faulty splicing may be an important function of NMD. To test this hypothesis di...

Attack by the specialist herbivore, Manduca sexta, on its native host Nicotiana attenuata Torr. ex Wats. produces a dramatic ethylene release, a jasmonate burst, and a suppression of the nicotine accumulation that results from careful simulations of the herbivore's damage. Methyl-jasmonate (MeJA) treatment induces nicotine biosynthesis. However, this induction can be suppressed by ethylene as p...

Nonsense-mediated mRNA decay (NMD) represents a phylogenetically widely conserved splicing- and translation-dependent mechanism that eliminates transcripts with premature translation stop codons and suppresses the accumulation of C-terminally truncated peptides. Elimination of frameshifted transcripts that result from faulty splicing may be an important function of NMD. To test this hypothesis ...

Salicylhydroxamic acid (SHAM), an inhibitor of alternative oxidase (AOX), blocks salicylic acid-induced resistance to tobacco mosaic virus (TMV) but does not inhibit pathogenesis-related PR-1 protein synthesis or resistance to fungal and bacterial pathogens. We found that the synthetic resistance-inducing chemical 2, 6-dichloroisonicotinic acid also induced Aox transcript accumulation and SHAM-...