Non-climacteric fruit ripening in pepper: increased transcription of EIL-like genes normally regulated by ethylene

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Title
Non-climacteric fruit ripening in pepper: increased transcription of EIL-like genes normally regulated by ethylene
Author(s)
S Lee; E J Chung; Y H Joung; Doil Choi
Bibliographic Citation
Functional & Integrative Genomics, vol. 10, no. 1, pp. 135-146
Publication Year
2010
Abstract
Only limited information has been published to date on the similarities and differences between climacteric and non-climacteric fruit ripening on transcriptional level. To address this issue, we performed a direct comparative transcriptome analysis between tomato and pepper fruits using heterologous microarray hybridization. Given the significant differences in the morphological, physiological, and biochemical characteristics of pepper and tomato fruits, the existence of extensive common regulons is surprising. This finding suggests the conservation of ripening mechanisms in climacteric and non-climacteric fruits. However, disparate expression profiles were also observed in both fruits. This study revealed that a gene that encodes an enzyme that converts lycopene to downstream carotenoids is induced in pepper but not in tomato. Most of the genes that encode ribosomal proteins are only induced in early fruit-stage pepper fruit and show rapidly diminishing expression in the later developmental stages. The genes involved in ethylene biosynthesis were not induced in pepper fruit. However, the EIL-like genes, ethylene-mediated signaling components, were induced in pepper fruit. Divergent types of transcription factors were expressed in ripening tomato and pepper fruits, suggesting they may be key factors that differentiate these distinct ripening processes.
Keyword
Climacteric ripeningComparative transcriptome analysisFruit developmentHeterologous array hybridizationMicroarrayNon-climacteric ripening
ISSN
1438-793X
Publisher
Springer
DOI
http://dx.doi.org/10.1007/s10142-009-0136-9
Type
Article
Appears in Collections:
1. Journal Articles > Journal Articles
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