Phototropin-related NPL1 controls chloroplast relocation induced by blue light

被引:376
作者
Jarillo, JA
Gabrys, H
Capel, J
Alonso, JM
Ecker, JR
Cashmore, AR [1 ]
机构
[1] Univ Penn, Dept Biol, Inst Plant Sci, Philadelphia, PA 19104 USA
[2] Jagiellonian Univ, Inst Mol Biol, PL-31120 Krakow, Poland
[3] Univ Almeria, Dept Biol Aplicada, Almeria 04120, Spain
关键词
D O I
10.1038/35073622
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
In photosynthetic cells, chloroplasts migrate towards illuminated sites to optimize photosynthesis and move away from excessively illuminated areas to protect the photosynthetic machinery(1). Although this movement of chloroplasts in response to light has been known for over a century, the photoreceptor mediating this process has not been identified. The Arabidopsis gene NPL1 (ref. 2) is a paralogue of the NPH1 gene, which encodes phototropin, a photoreceptor for phototropic bending(3). Here we show that NPL1 is required for chloroplast relocation induced by blue light. A loss-of-function npl1 mutant showed no chloroplast avoidance response in strong blue light, whereas the accumulation of chloroplasts in weak light was normal. These results indicate that NPL1 may function as a photoreceptor mediating chloroplast relocation.
引用
收藏
页码:952 / 954
页数:4
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