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Genome-wide identification and expression pattern analysis of lipoxygenase gene family in banana
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Genome-wide identification and expression pattern analysis of lipoxygenase gene family in banana
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Journal Article
Genome-wide identification and expression pattern analysis of lipoxygenase gene family in banana
2021
Overview
The LOX genes have been identified and characterized in many plant species, but studies on the banana LOX genes are very limited. In this study, we respectively identified 18 MaLOX, 11 MbLOX, and 12 MiLOX genes from the
Musa acuminata
,
M. balbisiana
and
M. itinerans
genome data, investigated their gene structures and characterized the physicochemical properties of their encoded proteins. Banana
LOXs
showed a preference for using and ending with G/C and their encoded proteins can be classified into 9-LOX, Type I 13-LOX and Type II 13-LOX subfamilies. The expansion of the
MaLOXs
might result from the combined actions of genome-wide, tandem, and segmental duplications. However, tandem and segmental duplications contribute to the expansion of
MbLOXs
. Transcriptome data based gene expression analysis showed that
MaLOX1
,
4
, and
7
were highly expressed in fruit and their expression levels were significantly regulated by ethylene. And 11, 12 and 7
MaLOXs
were found to be low temperature-, high temperature-, and
Fusarium oxysporum
f. sp.
Cubense
tropical race 4 (
Foc
TR4)-responsive, respectively.
MaLOX8
,
9
and
13
are responsive to all the three stresses,
MaLOX4
and
MaLOX12
are high temperature- and
Foc
TR4-responsive;
MaLOX6
and
MaLOX17
are significantly induced by low temperature and
Foc
TR4; and the expression of
MaLOX7
and
MaLOX16
are only affected by high temperature. Quantitative real-time PCR (qRT-PCR) analysis revealed that the expression levels of several
MaLOXs
are regulated by MeJA and
Foc
TR4, indicating that they can increase the resistance of banana by regulating the JA pathway. Additionally, the weighted gene co-expression network analysis (WGCNA) of
MaLOXs
revealed 3 models respectively for 5 (
MaLOX7
-
11
), 3 (
MaLOX6
,
13
, and
17
), and 1 (MaLOX
12
) MaLOX genes. Our findings can provide valuable information for the characterization, evolution, diversity and functionality of MaLOX, MbLOX and MiLOX genes and are helpful for understanding the roles of
LOXs
in banana growth and development and adaptations to different stresses.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
