Developing pineapple fruit has a small transcriptome dominated by metallothionein

Moyle, Richard, Fairbairn, David J., Ripi, Jonni, Crowe, Mark and Botella, Jose R. (2005) Developing pineapple fruit has a small transcriptome dominated by metallothionein. Journal of Experimental Botany, 56 409: 101-112. doi:10.1093/jxb/eri015

Author Moyle, Richard
Fairbairn, David J.
Ripi, Jonni
Crowe, Mark
Botella, Jose R.
Title Developing pineapple fruit has a small transcriptome dominated by metallothionein
Journal name Journal of Experimental Botany   Check publisher's open access policy
ISSN 0022-0957
Publication date 2005-01-01
Year available 2005
Sub-type Article (original research)
DOI 10.1093/jxb/eri015
Open Access Status Not yet assessed
Volume 56
Issue 409
Start page 101
End page 112
Total pages 12
Editor W. J. Davies
Place of publication Oxford
Publisher Oxford University Press
Language eng
Subject C1
270201 Gene Expression
620205 Tropical fruit
Abstract In a first step toward understanding the molecular basis of pineapple fruit development, a sequencing project was initiated to survey a range of expressed sequences from green unripe and yellow ripe fruit tissue. A highly abundant metallothionein transcript was identified during library construction, and was estimated to account for up to 50% of all EST library clones. Library clones with metallothionein subtracted were sequenced, and 408 unripe green and 1140 ripe yellow edited EST clone sequences were retrieved. Clone redundancy was high, with the combined 1548 clone sequences clustering into just 634 contigs comprising 191 consensus sequences and 443 singletons. Half of the EST clone sequences clustered within 13.5% and 9.3% of contigs from green unripe and yellow ripe libraries, respectively, indicating that a small subset of genes dominate the majority of the transcriptome. Furthermore, sequence cluster analysis, northern analysis, and functional classification revealed major differences between genes expressed in the unripe green and ripe yellow fruit tissues. Abundant genes identified from the green fruit include a fruit bromelain and a bromelain inhibitor. Abundant genes identified in the yellow fruit library include a MADS box gene, and several genes normally associated with protein synthesis, including homologues of ribosomal L10 and the translation factors SUI1 and eIF5A. Both the green unripe and yellow ripe libraries contained high proportions of clones associated with oxidative stress responses and the detoxification of free radicals.
Keyword Plant Sciences
Ananas Comosus
Nonclimacteric Fruit
Fruit Ripening
Initiation-factor 5a
Expressed Sequence Tags
Differential Expression
Deoxyhypusine Synthase
Oxidative Stress
Q-Index Code C1
Institutional Status UQ

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Created: Wed, 15 Aug 2007, 17:49:25 EST