Iron Is Involved in the Maintenance of Circadian Period Length in Arabidopsis
作者： Yong-Yi Chen , Ying Wang , Lung-Jiun Shin , Jing-Fen Wu , Varanavasiappan Shanmugam
关键词: Circadian clock 、 Period (gene) 、 Circadian rhythm 、 Arabidopsis thaliana 、 Arabidopsis 、 Gigantea 、 Retrograde signaling 、 Botany 、 Biology 、 Cell biology 、 Chloroplast
摘要: The homeostasis of iron (Fe) in plants is strictly regulated to maintain an optimal level for plant growth and development but not cause oxidative stress. About 30% arable land considered Fe deficient because calcareous soil that renders unavailable plants. Under Fe-deficient conditions, Arabidopsis (Arabidopsis thaliana) shows retarded growth, disordered chloroplast development, delayed flowering time. In this study, we explored the possible connection between availability circadian clock development. Circadian period length was longer under lengthened by canonical Fe-deficiency signaling pathway involving nitric oxide. However, with impaired function showed long periods. deficiency combined did show additive effects on period, which suggests plastid-to-nucleus retrograde involved lengthening deficiency. Expression pattern analyses central oscillator genes mutants defective CIRCADIAN CLOCK ASSOCIATED1/LATE ELONGATED HYPOCOTYL or GIGANTEA demonstrated their requirement deficiency-induced period. conclusion, maintaining rhythm, possibly acting specific oscillators through a pathway.
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