Abstract
The non-yellowing gene (NYE1), initially identified from Arabidopsis, is a key regulatory gene responsible for chlorophyll degradation during senescence. Here, FaNYE1, an orthologue of AtNYE1, was further identified from a major type of cool-season turf grass, tall fescue (Festuca arundinacea Schreb.), by RACE-PCR. It consists of 1,441 bp, with an open reading frame of 834 bp, encoding a predicted polypeptide of 278 amino acids. Sequence similarity as well as exon and intron characteristics clearly suggested that FaNYE1 encoded an AtNYE1-like chloroplast protein. FaNYE1 could be strongly induced by dark treatment and natural senescence. FaNYE1, driven by a 1.5 kb upstream fragment of AtNYE1, could rescue the stay-green phenotype of nye1-1. Constitutive overexpression of FaNYE1 in Arabidopsis resulted in the whole spectrum of leaf yellowing phenotypes, the severity of which correlates with its transcript level. These results collectively indicate that FaNYE1 might play an important regulatory role in chlorophyll degradation during senescence in tall fescue, and therefore is a valuable gene for improving the green period or lawn color of turf grasses by genetic engineering.
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Acknowledgments
This work was supported by a grant from the Natural Science Foundation of China (Grant no. 30770169), and a grant from the Science and Technology Committee of the Shanghai Municipal Government (Grant no. 08JC1400700).
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Communicated by E. Guiderdoni.
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Wei, Q., Guo, Y. & Kuai, B. Isolation and characterization of a chlorophyll degradation regulatory gene from tall fescue. Plant Cell Rep 30, 1201–1207 (2011). https://doi.org/10.1007/s00299-011-1028-8
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DOI: https://doi.org/10.1007/s00299-011-1028-8