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De novo transcriptome sequencing and analysis revealed the molecular basis of rapid fat accumulation by black soldier fly (Hermetia illucens, L.) for development of insectival biodiesel

BACKGROUND: Black soldier fly (BSF, Hermetia illucens L.) can efficiently degrade organic wastes and transform into a high fat containing insect biomass that could be used as feedstock for biodiesel production. Meanwhile, the molecular regulatory basis of fat accumulation by BSF is still unclear; it...

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Autores principales: Zhu, Zhaolu, Rehman, Kashif ur, Yu, Yongqiang, Liu, Xiu, Wang, Hui, Tomberlin, Jeffery K., Sze, Sing-Hoi, Cai, Minmin, Zhang, Jibin, Yu, Ziniu, Zheng, Jinshui, Zheng, Longyu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6688347/
https://www.ncbi.nlm.nih.gov/pubmed/31413730
http://dx.doi.org/10.1186/s13068-019-1531-7
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author Zhu, Zhaolu
Rehman, Kashif ur
Yu, Yongqiang
Liu, Xiu
Wang, Hui
Tomberlin, Jeffery K.
Sze, Sing-Hoi
Cai, Minmin
Zhang, Jibin
Yu, Ziniu
Zheng, Jinshui
Zheng, Longyu
author_facet Zhu, Zhaolu
Rehman, Kashif ur
Yu, Yongqiang
Liu, Xiu
Wang, Hui
Tomberlin, Jeffery K.
Sze, Sing-Hoi
Cai, Minmin
Zhang, Jibin
Yu, Ziniu
Zheng, Jinshui
Zheng, Longyu
author_sort Zhu, Zhaolu
collection PubMed
description BACKGROUND: Black soldier fly (BSF, Hermetia illucens L.) can efficiently degrade organic wastes and transform into a high fat containing insect biomass that could be used as feedstock for biodiesel production. Meanwhile, the molecular regulatory basis of fat accumulation by BSF is still unclear; it is necessary to identify vital genes and regulators that are involved in fat accumulation. RESULTS: This study analyzed the dynamic state of fat content and fatty-acid composition of BSF larvae in eight different stages. The late prepupa stage exhibited the highest crude fat, with lauric acid being the main component. Therefore, to provide insight into this unexplained phenomenon, the molecular regulation of rapid fat accumulation by BSF larvae was investigated. The twelve developmental stages of BSF were selected for transcriptome analysis, including the eight stages used for investigation of fat content and fatty-acid composition. By Illumina sequencing, 218,295,450,000 nt were generated. Through assembly by Trinity, 70,475 unigenes were obtained with an average length of 1064 nt and an N50 of 1749 nt. The differentially expressed unigenes were identified by DESeq, with 9159 of them being up-regulated and 10,101 of them were down-regulated. The several putative genes that are involved in the formation of pyruvate, acetyl-CoA biosynthesis, acetyl-CoA transcription, fatty-acid biosynthesis, and triacylglycerol biosynthesis were identified. The four vital metabolic genes that are associated with fat accumulation were validated by quantitative real-time PCR (qRT-PCR). The molecular mechanism of fat accumulation in BSF was clarified in this investigation through the construction of a detailed fat accumulation model from our results. CONCLUSION: The study provides an unprecedented level of insight from transcriptome sequencing to reveal the crude fat accumulation mechanism in developing BSF. The finding holds considerable promise for insectival biodiesel production, and the fat content and fatty-acid composition can be altered by genetic engineering approaches in the future for the insect production industry. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1186/s13068-019-1531-7) contains supplementary material, which is available to authorized users.
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spelling pubmed-66883472019-08-14 De novo transcriptome sequencing and analysis revealed the molecular basis of rapid fat accumulation by black soldier fly (Hermetia illucens, L.) for development of insectival biodiesel Zhu, Zhaolu Rehman, Kashif ur Yu, Yongqiang Liu, Xiu Wang, Hui Tomberlin, Jeffery K. Sze, Sing-Hoi Cai, Minmin Zhang, Jibin Yu, Ziniu Zheng, Jinshui Zheng, Longyu Biotechnol Biofuels Research BACKGROUND: Black soldier fly (BSF, Hermetia illucens L.) can efficiently degrade organic wastes and transform into a high fat containing insect biomass that could be used as feedstock for biodiesel production. Meanwhile, the molecular regulatory basis of fat accumulation by BSF is still unclear; it is necessary to identify vital genes and regulators that are involved in fat accumulation. RESULTS: This study analyzed the dynamic state of fat content and fatty-acid composition of BSF larvae in eight different stages. The late prepupa stage exhibited the highest crude fat, with lauric acid being the main component. Therefore, to provide insight into this unexplained phenomenon, the molecular regulation of rapid fat accumulation by BSF larvae was investigated. The twelve developmental stages of BSF were selected for transcriptome analysis, including the eight stages used for investigation of fat content and fatty-acid composition. By Illumina sequencing, 218,295,450,000 nt were generated. Through assembly by Trinity, 70,475 unigenes were obtained with an average length of 1064 nt and an N50 of 1749 nt. The differentially expressed unigenes were identified by DESeq, with 9159 of them being up-regulated and 10,101 of them were down-regulated. The several putative genes that are involved in the formation of pyruvate, acetyl-CoA biosynthesis, acetyl-CoA transcription, fatty-acid biosynthesis, and triacylglycerol biosynthesis were identified. The four vital metabolic genes that are associated with fat accumulation were validated by quantitative real-time PCR (qRT-PCR). The molecular mechanism of fat accumulation in BSF was clarified in this investigation through the construction of a detailed fat accumulation model from our results. CONCLUSION: The study provides an unprecedented level of insight from transcriptome sequencing to reveal the crude fat accumulation mechanism in developing BSF. The finding holds considerable promise for insectival biodiesel production, and the fat content and fatty-acid composition can be altered by genetic engineering approaches in the future for the insect production industry. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1186/s13068-019-1531-7) contains supplementary material, which is available to authorized users. BioMed Central 2019-08-09 /pmc/articles/PMC6688347/ /pubmed/31413730 http://dx.doi.org/10.1186/s13068-019-1531-7 Text en © The Author(s) 2019 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Research
Zhu, Zhaolu
Rehman, Kashif ur
Yu, Yongqiang
Liu, Xiu
Wang, Hui
Tomberlin, Jeffery K.
Sze, Sing-Hoi
Cai, Minmin
Zhang, Jibin
Yu, Ziniu
Zheng, Jinshui
Zheng, Longyu
De novo transcriptome sequencing and analysis revealed the molecular basis of rapid fat accumulation by black soldier fly (Hermetia illucens, L.) for development of insectival biodiesel
title De novo transcriptome sequencing and analysis revealed the molecular basis of rapid fat accumulation by black soldier fly (Hermetia illucens, L.) for development of insectival biodiesel
title_full De novo transcriptome sequencing and analysis revealed the molecular basis of rapid fat accumulation by black soldier fly (Hermetia illucens, L.) for development of insectival biodiesel
title_fullStr De novo transcriptome sequencing and analysis revealed the molecular basis of rapid fat accumulation by black soldier fly (Hermetia illucens, L.) for development of insectival biodiesel
title_full_unstemmed De novo transcriptome sequencing and analysis revealed the molecular basis of rapid fat accumulation by black soldier fly (Hermetia illucens, L.) for development of insectival biodiesel
title_short De novo transcriptome sequencing and analysis revealed the molecular basis of rapid fat accumulation by black soldier fly (Hermetia illucens, L.) for development of insectival biodiesel
title_sort de novo transcriptome sequencing and analysis revealed the molecular basis of rapid fat accumulation by black soldier fly (hermetia illucens, l.) for development of insectival biodiesel
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6688347/
https://www.ncbi.nlm.nih.gov/pubmed/31413730
http://dx.doi.org/10.1186/s13068-019-1531-7
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