Article
Entomology
Xinxin Gao, Jihong Zhang, Qilian Qin, Peipei Wu, Huan Zhang, Qian Meng
Summary: Energy metabolism is crucial in insect metamorphosis, particularly in the larval-pupal stage of holometabolous insects. In this study, metabolome and transcriptome analyses were conducted to elucidate the metabolic changes and regulatory mechanisms during larval-pupal metamorphosis of the cotton bollworm, Helicoverpa armigera. The findings revealed that aerobic glycolysis supported cell proliferation and lipid synthesis during the feeding stage, while triglyceride degradation and acylcarnitine accumulation were activated during non-feeding stages. This study provides valuable insights into the metabolic regulation mechanism of lepidopteran larvae during their final stage of development.
Article
Agronomy
Qin Lu, Yan Li, Jing Liao, Zhaohong Ni, Shunchao Xia, Maofa Yang, Haiyin Li, Jianjun Guo
Summary: This study investigated the role of histone H3 acetylation in diapause of the cotton bollworm and found that it is closely related to pupal diapause, suggesting its potential as a target for pest control.
PEST MANAGEMENT SCIENCE
(2023)
Article
Agronomy
Zhong-Jian Shen, Fang Zhu, Yan-Jun Liu, Zhen Li, Timothy W. Moural, Xiao-Ming Liu, Xiaoxia Liu
Summary: The study investigates the regulatory functions of dopamine (DA) and its associated non-coding RNA in the metamorphosis of the cotton bollworm, Helicoverpa armigera. It is found that DA deficiency inhibits larval-pupal metamorphosis in H. armigera. The study suggests that DA pathway genes and their microRNAs could be used as a novel target for H. armigera management.
PEST MANAGEMENT SCIENCE
(2022)
Article
Agriculture, Multidisciplinary
Xiao-Shuai ZHANG, Xiao-Long SU, Shao-Lei GENG, Zheng-Hao WANG
Summary: Diapause is an important strategy for insects to survive extreme environments. In this study, it was found that mitochondrial ROS play a crucial role in diapause by regulating insulin signaling pathway. Injection of a glucose metabolism inhibitor could delay pupal development, while injection of a metabolite mixture could prevent diapause. Furthermore, ROS could activate HSP60 expression, promoting the degradation of mitochondrial transcription factor A and decreasing mitochondrial activity.
JOURNAL OF INTEGRATIVE AGRICULTURE
(2022)
Article
Agriculture, Multidisciplinary
Shuaichao Zheng, Ruifang Chen, Lisha Wang, Shaodong Pan, Weijiao Liu, Xiangzhen Zhu, Xueke Gao, Junyu Luo, Jinjie Cui
Summary: This study reveals that early colonization of A. gossypii on cotton plants has an avoidance effect on oviposition preference of H. armigera adults, but promotes the growth and development of H. armigera larvae. Transcriptomic and metabolomic analyses identify multiple genes and metabolites associated with the growth and development of H. armigera.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2022)
Article
Microbiology
Jessica Dittmer, Robert M. Brucker
Summary: This study investigated the role of microbiome in host nutrient allocation during diapause of parasitoid wasp N. vitripennis, revealing the essential role of microbiome and altered microbiome composition during diapause. The prolonged larval diapause had a transstadial effect on the adult microbiome, leading to changes in the abundance of dominant microbiome members and potential bacterial pathogens. The impact of diapause on the microbiome is likely influenced by various factors, including altered host regulatory mechanisms and the host environment.
Article
Biochemistry & Molecular Biology
X. W. Lin, Z. Z. Fan, Y. H. Liu, J. Li, Q. Ma, R. H. Yan
Summary: The study reveals that reactive oxygen species activate MEK/ERK signaling pathway, leading to the maintenance of diapause state. Inhibiting MEK/ERK activity can terminate the progress of diapause.
INSECT MOLECULAR BIOLOGY
(2021)
Article
Entomology
Haiyin Li, Qin Lu, Yan Li, Yufang Yan, Zhiyong Yin, Jianjun Guo, Weihua Xu
Summary: The E3 ubiquitin ligase Smurf was found to be involved in diapause regulation in Helicoverpa armigera by modulating the TGF-beta signaling pathway. The ubiquitination of TGF beta RI and Smad2 by Smurf plays a crucial role in pupal development during diapause.
Article
Biochemistry & Molecular Biology
Shao-Lei Geng, Hai-Yin Li, Xiao-Shuai Zhang, Tao Wang, Shi-Pei Zhou, Wei-Hua Xu
Summary: This study found that diapause-destined pupae of the moth Helicoverpa armigera have higher levels of protein carbonylation in the brain compared to nondiapause-destined pupae. The study also showed that ROS activate Akt, which phosphorylates CREB and facilitates its nuclear import, leading to the regulation of CBR1 expression and reduction of protein carbonyl levels.
Article
Entomology
Long-Long Sun, Xiao-Lan Liu, Ya-Nan Wang, Bente G. Berg, Gui-Ying Xie, Wen-Bo Chen, Yang Liu, Gui-Rong Wang, Xin-Cheng Zhao, Qing-Bo Tang
Summary: The study characterized single neurons in the gnathal ganglion of Helicoverpa armigera larvae using the intracellular recording/staining technique, identifying different types of neurons including sensory neurons, interneurons, and motor neurons. The diverse morphologies of these neurons and their arborizations seemingly cover the whole gnathal ganglion. The representation of single neurons responding to sweet and bitter cues did not show distinct patterns in the gnathal ganglion, suggesting taste signals may be processed in a manner consistent with population coding in H. armigera larvae.
Article
Biochemistry & Molecular Biology
Zhiqiang Tian, Lin Zhu, J. P. Michaud, Meng Zha, Jie Cheng, Zhongjian Shen, Xiaoming Liu, Xiaoxia Liu
Summary: Baculoviruses genetically reprogram their host insects to create a suitable environment for virus replication. In this study, infected larvae of Helicoverpa armigera showed an accumulation of glucose in the midgut, which altered metabolism and immunity. The insulin signalling pathway played a crucial role in regulating the virus infection process. Dietary restriction reduced mortality and viral replication, while glucose supplementation had the opposite effects. This research highlights the importance of metabolic reprogramming and immune suppression in successful baculovirus infections.
Article
Genetics & Heredity
Yan Chen, Pei-Chao Wang, Shuai-Shuai Zhang, Jun Yang, Guo-Cheng Li, Ling-Qiao Huang, Chen-Zhu Wang
Summary: This study investigates the function of the gustatory receptor Gr180 in Helicoverpa armigera caterpillars. The results show that Gr180 responds to coumarin and is also involved in sensing sinigrin and strychnine. These findings enhance our understanding of the gustatory coding mechanisms of herbivorous insects to deterrents.
Article
Environmental Sciences
Zhiqiang Tian, Meng Zha, Limei Cai, J. P. Michaud, Jie Cheng, Zhongjian Shen, Xiaoming Liu, Xiaoxia Liu
Summary: Infection of Helicoverpa armigera single nucleopolyhedrovirus (HearNPV) can restrict the growth and development of larvae by inducing reactive oxygen species (ROS) and affecting immune responses. The transcription factor forkhead box O (FoxO) upregulates the expression of peroxiredoxin 1 (Prx1), which plays a role in regulating larval development and immunity following HearNPV infection.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2022)
Article
Agronomy
Wanna Zhang, Long Ma, Xiangya Liu, Yingchuan Peng, Gemei Liang, Haijun Xiao
Summary: The study found that sublethal doses of MF have severe adverse effects on the development of Helicoverpa armigera, including ecdysis failure, prolonged larval duration, and decreased pupal weight. Additionally, MF inhibits ecdysteroidogenesis at sublethal doses, but induces the expression of 20-hydroxyecdysone (20E) response genes, including HaFTZ-F1.
PEST MANAGEMENT SCIENCE
(2021)
Article
Multidisciplinary Sciences
Allah Ditta Abid, Shafqat Saeed, Syed Muhammad Zaka, Sohail Shahzad, Muhammad Nadir Naqqash, Naeem Iqbal
Summary: Farmers often rely on chemical control to manage insect pests, but this can pose health hazards for humans and the environment. Biopesticides like Nucleopolyhedrovirus (NPVs) offer a less toxic alternative, with effective control against lepidopteran larvae. This study aimed to determine the host range of NPV in Pakistan. Results showed high mortality in Helicoverpa armigera, the target pest, while other tested species showed no significant difference in mortality compared to the control. Pathogenicity varied with time of infection, influenced by factors such as larval body size and environmental conditions. NPV exhibited high specificity, making it a promising ecofriendly tool for managing H. armigera.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2022)
