Article
Physiology
Joanna Kotwica-Rolinska, Milena Damulewicz, Lenka Chodakova, Lucie Kristofova, David Dolezel
Summary: Daily and annually cycling conditions on Earth have led organisms to develop time-measuring devices. Circadian clocks adjust physiology to daily cycles, while the photoperiodic clock anticipates seasonal changes. In insects, the neuropeptide Pigment Dispersing Factor (PDF) plays a crucial role. This study provides new insight into the role of PDF in the circadian and photoperiodic systems of the linden bug.
FRONTIERS IN PHYSIOLOGY
(2022)
Article
Entomology
Kazune Hirata, Sakiko Shiga
Summary: This study aims to determine whether the Bolwig organ in Sarcophaga similis is the photoperiodic photoreceptor. Surgical removal of the Bolwig organ resulted in a similar diapause incidence in larvae reared under constant darkness, suggesting that the Bolwig organ contributes partially to photoperiodic photoreception and other photoreceptors may also be involved.
Article
Plant Sciences
Yaoyao Huang, Xiaojuan Xing, Yun Tang, Jinyu Jin, Lian Ding, Aiping Song, Sumei Chen, Fadi Chen, Jiafu Jiang, Weimin Fang
Summary: This study reveals that CmERF110 interacts with CmFLK to regulate flowering time and affect circadian clock-related genes in chrysanthemum. These findings provide evidence for the evolutionary conservation of the flowering regulation pathway in chrysanthemum.
PLANT CELL AND ENVIRONMENT
(2022)
Review
Plant Sciences
Changhui Sun, Changcai He, Chao Zhong, Shihang Liu, Hongying Liu, Xu Luo, Jun Li, Yuxiu Zhang, Yuting Guo, Bin Yang, Pingrong Wang, Xiaojian Deng
Summary: Photoperiod is crucial for plant flowering, and different plants have different responses to photoperiod. The molecular mechanisms of flowering time in rice and Arabidopsis have gradually been clarified, providing an opportunity to study the differences in day length measurement between these two types of plants. The relationship among photoperiodic regulators and a proposed regulatory framework for the reversible mechanism are evaluated, which deepens our understanding of the CDL regulation mechanism.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Hisashi Tobita, Takashi Kiuchi
Summary: Diapause, an important trait for insects' survival, is determined by the photoperiod which controls the timing of diapause induction. In the silkworm, maternal conditions and core clock genes like period play a crucial role in the regulation of photoperiodic diapause. Knocking out clock genes disrupt normal feedback loops and affect the ability of female moths to induce diapause in response to photoperiod.
INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY
(2022)
Article
Cell Biology
Ryohei Koide, Jili Xi, Yoshitaka Hamanaka, Sakiko Shiga
Summary: Circadian clock genes play a role in photoperiodic responses in insects, but the neural pathways involving clock cells processing photoperiodic information are not fully understood. PERIOD-immunohistochemistry in the bean bug Riptortus pedestris revealed the localization of clock cells and their connections with other brain neurons essential for photoperiodic responses in different brain regions.
CELL AND TISSUE RESEARCH
(2021)
Article
Biochemistry & Molecular Biology
Natalie E. van Dis, Judith E. Risse, Agata S. Pijl, Roelof A. Hut, Marcel E. Visser, Bregje Wertheim
Summary: Climate change has a strong impact on the developmental timing of insects, particularly their development rate which is influenced by ambient temperature. However, the genetic mechanisms underlying the temperature sensitivity of embryonic development in insects remain poorly understood. This study investigated the genetic regulation of embryonic development rate in response to temperature in a species of moth, and identified several candidate genes involved in histone modification, hormonal signalling, nervous system development, and circadian clock genes. The findings suggest that there are multiple potential targets for selection to change the temperature sensitivity of embryonic development rate in insects.
Article
Biochemistry & Molecular Biology
Olle Lindestad, Soren Nylin, Christopher W. Wheat, Karl Gotthard
Summary: Geographical variation in voltinism, the number of generations produced per year, has been observed in many insect species. This study used population genomics to compare nine Scandinavian populations of the butterfly Pararge aegeria with different life cycle traits along both north-south and east-west clines. The results identified candidate genes related to the insect circadian clock, including a novel gene deletion in a single population. This research adds to the understanding of circadian gene variation as a potential mechanism for generating local adaptation of life cycles.
Review
Entomology
Shin G. Goto
Summary: This article reviews our current understanding of the physiological and molecular mechanisms underlying insect photoperiodism, with a special emphasis on photoperiodic time measurement models.
APPLIED ENTOMOLOGY AND ZOOLOGY
(2022)
Article
Plant Sciences
Hayato Yoshioka, Keiko Kimura, Yuko Ogo, Namie Ohtsuki, Ayako Nishizawa-Yokoi, Hironori Itoh, Seiichi Toki, Takeshi Izawa
Summary: Flowering in plants is an important biological process that determines the timing of reproduction based on photoperiod. Genes like Ghd7 and Hd1 in rice play different roles under long and short day lengths, and real-time monitoring of their protein products is required to understand the accurate photoperiod recognition at a molecular level.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Masaharu Hasebe, Sakiko Shiga
Summary: Animals can modulate their physiology and behavior according to the season, and this study reveals that extracellular glutamate dynamics in the brain play an essential role in the photoperiodic control of reproduction. The researchers found that glutamate levels in the brain are regulated by the circadian clock gene and that genetic modulation of glutamate metabolism genes can attenuate photoperiodic responses. They also discovered that glutamate acts as an inhibitory signal to specific neurons involved in photoperiodic changes at a cellular level.
Article
Biotechnology & Applied Microbiology
Changhui Sun, Kuan Zhang, Yi Zhou, Lin Xiang, Changcai He, Chao Zhong, Ke Li, Qiuxia Wang, Chuanpeng Yang, Qian Wang, Congping Chen, Dan Chen, Yang Wang, Chuanqiang Liu, Bin Yang, Hualin Wu, Xiaoqiong Chen, Weitao Li, Jing Wang, Peizhou Xu, Pingrong Wang, Jun Fang, Chengcai Chu, Xiaojian Deng
Summary: The study identified a novel gene, OsLHY, in rice that may be involved in regulating the circadian clock. OsLHY influences flowering time through the OsGI-Hd1 pathway and plays a role in fine-tuning the critical day length (CDL) by directly regulating OsGI. This study illustrates a new regulatory mechanism between the circadian clock and photoperiodic flowering.
PLANT BIOTECHNOLOGY JOURNAL
(2021)
Article
Multidisciplinary Sciences
Masaharu Hasebe, Sakiko Shiga
Summary: In the bean bug Riptortus pedestris, the photoperiodic firing response of the pars intercerebralis (PI) neurons, which are regulated by clock genes, plays a crucial role in promoting oviposition. This photoperiodic response is independent of ovarian development and is mediated by neuropeptides expressed by the PI neurons. The findings suggest that a circadian clock-dependent photoperiodic firing response in specific neurons contributes to the seasonal promotion of oviposition.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Multidisciplinary Sciences
Kosaku Masuda, Isao T. Tokuda, Norihito Nakamichi, Hirokazu Fukuda
Summary: Circadian clocks enable organisms to synchronize physiological processes with diurnal variations, with the phase response curve being a key tool to understand clock entrainment. This study demonstrates that fundamental properties of the curve can be recovered from the singularity response, which can be easily measured by applying a single stimulus to a desynchronized cellular network. The method is simple, accurate, and applicable to other coupled oscillator systems, offering potential to study circadian clock entrainment in plants and other species in a cost-effective manner.
NATURE COMMUNICATIONS
(2021)
Article
Entomology
Can Zhao, Yi Guo, Zixin Liu, Yue Xia, Yuyan Li, Ziwei Song, Baoxin Zhang, Dunsong Li
Summary: The study found that a short photoperiod and medium temperature induce diapause in A. japonicus, with second-third instar larvae being the most sensitive to diapause stimuli. Diapausing mature larvae had a higher survival rate at 10°C after 180 days compared to non-diapausing mature larvae. These findings suggest potential methods for developmental regulation, field-release pretreatment technology, and long-term storage of A. japonicus.
Article
Entomology
Bing Han, David L. Denlinger
JOURNAL OF INSECT PHYSIOLOGY
(2009)
Review
Biochemistry & Molecular Biology
Bing Han, Chih-Chun Janet Lin, Guo Hu, Meng C. Wang
Article
Biology
Lucas A. Hartsough, Mooncheol Park, Matthew Kotlajich, John Tyler Lazar, Bing Han, Chih-Chun J. Lin, Elena Musteata, Lauren Gambill, Meng C. Wang, Jeffrey J. Tabor
Article
Biochemistry & Molecular Biology
Bing Han, Priya Sivaramakrishnan, Chih-Chun J. Lin, Isaiah A. A. Neve, Jingquan He, Li Wei Rachel Tay, Jessica N. Sowa, Antons Sizovs, Guangwei Du, Jin Wang, Christophe Herman, Meng C. Wang
Article
Entomology
Shin G. Goto, Bing Han, David L. Denlinger
JOURNAL OF INSECT PHYSIOLOGY
(2006)
