FIN219在藍光與乙烯訊息傳遞交感作用之研究

杜信杰

doi:10.6342/NTU.2005.00751

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FIN219在藍光與乙烯訊息傳遞交感作用之研究

Investigation of the involvement of Arabidopsis FIN219 in the integration of blue light and ethylene signaling pathways

杜信杰 , Masters　　Advisor：謝旭亮　　

繁體中文 DOI： 10.6342/NTU.2005.00751

FIN219 ；遠紅光；藍光；乙烯；荷爾蒙；阿拉伯芥；頂點鉤； FIN219 ； far-red light ； blue ligth ； ethylene ； hormones ； Arabidopsis ； apical hook

Abstract │ Reference (78) │ Times Cited (1) │ Altmetrics

Abstract 〈TOP〉

Parallel Abstract 〈TOP〉

FIN219 has been demonstrated to be involved in phytochromes A-mediated inhibition of hypocotyl elongation in far-red light (FR) and its overexpressed transgenic Arabidopsis  seedlings display a hypersensitive phenotype under FR, blue and white light conditions, which suggests that FIN219 may play a role in blue light signaling. To explore this possibility, a yeast two-hybrid interaction approach was utilized to examine whether FIN219 can interact with blue light photoreceptors, cryptochrome 1 (cry1) and 2 (cry2). The result indicated that the C-terminus of FIN219 can interact with CRY1 and CRY2. As well, FIN219 overexpression in cry1, cry2, or cry1cry2 mutant backgrounds did not show obvious phenotype, which implies that FIN219 may function only in the presence of CRYs proteins. Overexpression of FIN219 in GUS-CCT1 transgenic plants can rescue the constitutive photomorphogenic phenotype of GUS-CCT1 in darkness, which indicates that the interaction between FIN219 and GUS-CCT1 may exclude the binding of GUS-CCT1 to COP1
    Microarray data revealed that fin219 mutation resulted in the upregulation of 4 different ethylene signaling components. This findings lead us to test whether FIN219 regulates ethylene response or signaling. The FIN219 overexpression in the cry1cry2 mutant background can rescue the defect of cry1cry2 mutants in response to 1-aminocyclopropane-1-carboxylic acid (ACC, a precursor of ethylene). Histochemical GUS staining indicated that ACC induced FIN219 expression in the exaggerated apical hook. ACC might promotes the downward transport of FIN219-GUS fusion proteins. In addition, FIN219 promoter activity was regulated by the addition of methyl jasmonate and auxin under FR light, which indicates that the photomorphogenic phenotype triggered by FR may be the result of combinatory interactions among multiple hormones and FR, where FIN219 may play a vital function to fine tune the process.

Reference ( 78 ) 〈TOP〉

Ahmad, M., and Cashmore, A.R. (1993). HY4 gene of A. thaliana encodes a protein with characteristics of a blue-light photoreceptor. Nature 366, 162-166.
連結：
Ahmad, M., and Cashmore, A.R. (1997). The blue-light receptor cryptochrome 1 shows functional dependence on phytochrome A or phytochrome B in Arabidopsis thaliana. Plant J 11, 421-427.
連結：
Ahmad, M., Lin, C., and Cashmore, A.R. (1995). Mutations throughout an Arabidopsis blue-light photoreceptor impair blue-light-responsive anthocyanin accumulation and inhibition of hypocotyl elongation. Plant J 8, 653-658.
連結：
Ahmad, M., Jarillo, J.A., and Cashmore, A.R. (1998a). Chimeric proteins between cry1 and cry2 Arabidopsis blue light photoreceptors indicate overlapping functions and varying protein stability. Plant Cell 10, 197-207.
連結：
Ahmad, M., Jarillo, J.A., Smirnova, O., and Cashmore, A.R. (1998b). The CRY1 blue light photoreceptor of Arabidopsis interacts with phytochrome A in vitro. Mol Cell 1, 939-948.
連結：

Times Cited (1) 〈TOP〉

黃瓊慧(2005)。阿拉伯芥中FIN219和光型態發生突變體之間的功能性研究。臺灣大學植物科學研究所學位論文。2005。1-111。

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