title: Salicylic acid is involved in the regulation of starvation stress-induced flowering in Lemna paucicostata.
abstract: The short-day plant, Lemna paucicostata (synonym Lemna aequinoctialis), was induced to flower when cultured in tap water without any additional nutrition under non-inductive long-day conditions. Flowering occurred in all three of the tested strains, and strain 6746 was the most sensitive to the starvation stress conditions. For each strain, the stress-induced flowering response was weaker than that induced by short-day treatment, and the stress-induced flowering of strain 6746 was completely inhibited by aminooxyacetic acid and l-2-aminooxy-3-phenylpropionic acid, which are inhibitors of phenylalanine ammonia-lyase. Significantly higher amounts of endogenous salicylic acid (SA) were detected in the fronds that flowered under the poor-nutrition conditions than in the vegetative fronds cultured under nutrition conditions, and exogenously applied SA promoted the flowering response. The results indicate that endogenous SA plays a role in the regulation of stress-induced flowering.
authors.affiliation: Graduate School of Science and Technology, Niigata University, Ikarashi, Niigata 950-2181, Japan.
authors.forename: Aya
authors.initials: A
authors.lastname: Shimakawa
authors.forename: Takeshi
authors.initials: T
authors.lastname: Shiraya
authors.forename: Yuta
authors.initials: Y
authors.lastname: Ishizuka
authors.forename: Kaede C
authors.initials: KC
authors.lastname: Wada
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Mitsui
authors.forename: Kiyotoshi
authors.initials: K
authors.lastname: Takeno
mesh_terms: D029064:Araceae / Q000187:drug effects* / Q000201:enzymology / Q000502:physiology*; D004791:Enzyme Inhibitors / Q000494:pharmacology; D035264:Flowers / Q000187:drug effects* / Q000201:enzymology / Q000502:physiology*; D010650:Phenylalanine Ammonia-Lyase / Q000037:antagonists & inhibitors / Q000378:metabolism; D020156:Salicylic Acid / Q000378:metabolism / Q000494:pharmacology*; D013312:Stress, Physiological / Q000187:drug effects*; D013997:Time Factors
chemical_list: D004791:Enzyme Inhibitors; D010650:Phenylalanine Ammonia-Lyase; D020156:Salicylic Acid