Author:
Yang Gangqiang,Ishimaru Yasuhiro,Hoshino Shunji,Muraoka Yuki,Uozumi Nobuyuki,Ueda Minoru
Abstract
AbstractFoliar nyctinasty, a circadian rhythmic movement in plants, is common among leguminous plants and has been widely studied. Biological studies on nyctinasty have been conducted using Samanea saman as a model plant. It has been shown that the circadian rhythmic potassium flux from/into motor cells triggers cell shrinking/swelling to cause nyctinastic leaf-folding/opening movement in S. saman. Recently, 12-hydroxyjasmonic acid glucoside (JAG) was identified as an endogenous chemical factor causing leaf-folding of S. saman. Additionally, SPORK2 was identified as an outward-rectifying potassium channel that causes leaf-movement in the same plant. However, the molecular mechanism linking JAG and SPORK2 remains elusive. Here, we report that JAG induces leaf-folding through accumulation of reactive oxygen species in the extensor motor cells of S. saman, and this occurs independently of plant hormone signaling. Furthermore, we show that SPORK2 is indispensable for the JAG-triggered shrinkage of the motor cell. This is the first report on JAG, which is believed to be an inactivated/storage derivative of JA, acting as a bioactive metabolite in plant.
Funder
Japan Society for the Promotion of Science
Publisher
Springer Science and Business Media LLC
Reference55 articles.
1. Moran, N. in Rhythms in Plants, Ch. 4 57–95 (2015).
2. Moran, N. Osmoregulation of leaf motor cells. Febs Lett 581, 2337–2347. https://doi.org/10.1016/j.febslet.2007.04.002 (2007).
3. Satter, R. L., Gorton, H. L. & Vogelmann, T. C. The Pulvinus: Motor Organ for Leaf Movement (American Society of Plant Physiologists, Rockville, 1990).
4. Schildknecht, H. Turgorins, hormones of the endogeneous daily rhythms of higher organized plants—detection, isolation, structure, synthesis, and activity. Angew. Chem. Int. Ed. Engl. 22, 695–710. https://doi.org/10.1002/anie.198306951 (1983).
5. de Mairan, J. Observation botanique. Hist. Acad. Roy. Sci. 362, 103–113 (1729).
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