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Organ-specific expression and epigenetic traits of genes encoding digestive enzymes in the lance-leaf sundew (Drosera adelae).

Abstract：

:Over the last two decades, extensive studies have been performed at the molecular level to understand the evolution of carnivorous plants. As fruits, the repertoires of protein components in the digestive fluids of several carnivorous plants have gradually become clear. However, the quantitative aspect of these proteins and the expression mechanisms of the genes that encode them are still poorly understood. In this study, using the Australian sundew D. adelae, we identified and quantitated the digestive fluid proteins, and examined the expression and methylation status of the genes corresponding to the major hydrolytic enzymes in various organs, including thaumatin-like protein, S-like RNase, cysteine protease, class I chitinase, β-1, 3-glucanase and hevein-like protein. The genes encoding these proteins are exclusively expressed in the glandular tentacles. Furthermore, the promoters of the β-1, 3-glucanase and cysteine protease genes were demethylated only in the glandular tentacles, similar to the previously reported case of the S-like RNase gene da-I. This phenomenon correlated well with the high expression of the DNA demethylase DEMETER in the glandular tentacles, strongly suggesting that it performs the glandular tentacle-specific demethylation of the three genes. The current study has strengthened and generalized the relevance of epigenetics to trap organ-specific gene expression in D. adelae. We also suggest the similarities between the carnivorous organs of carnivorous plants and the roots of non-carnivorous plants.

journal_name

J Exp Bot

journal_title

Journal of experimental botany

authors

Arai N,Ohno Y,Jumyo S,Hamaji Y,Ohyama T

doi

10.1093/jxb/eraa560

subject

Has Abstract

pub_date

2020-11-28 00:00:00

eissn

0022-0957

issn

1460-2431

pii

6009011

pub_type

杂志文章

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