Results 1 to 10 of about 190,854 (247)

Latitudinal trends in human primary activities: characterizing the winter day as a synchronizer [PDF]

Scientific Reports 8 5350 2018, 2017
This work analyzes time use surveys from 19 countries (17 European and 2 American) in the middle latitude range from 38{\deg} to 61{\deg} latitude accounting for 45% of world population in that range. Time marks for primary activities (sleeping, working and eating) are systematically contrasted against light/dark conditions related to latitude.
Martin-Olalla, Jose Maria
arxiv   +6 more sources

Plant responses to photoperiod [PDF]

New Phytologist, 2009
Photoperiod controls many developmental responses in animals, plants and even fungi. The response to photoperiod has evolved because daylength is a reliable indicator of the time of year, enabling developmental events to be scheduled to coincide with ...
Abe, Achard, Adams, Adams, Alabadi, An, Asai, Aukerman, Balasubramanian, Banerjee, Batutis, Beales, Ben-Naim, Berardini, Bernier, Blazquez, Blázquez, Blázquez, Bollman, Bongard-Pierce, Borchert, Bouveret, Bäurle, Böhlenius, Cerdán, Chae, Chailkhyan, Chen, Chen, Chien, Chincinska, Clarke, Cockcroft, Corbesier, David, Devlin, Doi, Dudley, Duncan, Fahlgren, Farré, Foster, Fowler, Gandikota, Gardner, Giavalisco, Goldman, Gonthier, Grigg, Hackett, Halliday, Hayama, Hayama, Haywood, He, He, Henderson, Heyer, Holm, Hotta, Hsu, Hunter, Hunter, Imaizumi, Imaizumi, Izawa, Jackson, Jackson, Jackson, Jackson, Jaeger, Jang, Jung, Kanrar, Kelly, Kim, Kim, Kim, Kim, Kojima, Komiya, Kotake, Kusnetsov, Laubinger, Lauter, Lee, Lee, Lin, Martinez-Garcia, Martínez, Mathieu, McClung, Michael, Moon, Mouradov, Más, Nilsson, Onouchi, Orkwiszewski, Osterlund, Park, Peragine, Pineiro, Poethig, Poethig, Pouteau, Razem, Reeves, Roberts, Robinson, Robson, Roden, Rodriguez-Falcon, Saijo, Samach, Sawa, Schmid, Schwarz, Searle, Seo, Singer, Sivitz, Smith, Somers, Souer, Stadler, Steward, Suàrez-López, Swiezewski, Takada, Takeno, Tamaki, Telfer, Tessadori, Thomas, Turner, Valverde, Vega, Von Arnim, Wang, Wang, Weigel, Wenkel, Wigge, Willmann, Wu, Xie, Yamaguchi, Yan, Yanovsky, Yanovsky, Yoo, Yoo, Yu, Zeevaart   +154 more
core   +5 more sources

Photoperiodism and Circadian Rhythms [PDF]

Cold Spring Harbor Symposia on Quantitative Biology, 1960
K. C. Hamner
openalex   +4 more sources

Effects of photoperiod extension on clock gene and neuropeptide RNA expression in the SCN of the Soay sheep [PDF]

, 2016
In mammals, changing daylength (photoperiod) is the main synchronizer of seasonal functions. The photoperiodic information is transmitted through the retino-hypothalamic tract to the suprachiasmatic nuclei (SCN), site of the master circadian clock.
Dardente, Hugues, Hazlerigg, David G., Lincoln, Gerald A., Wagner, Gabriela C., Wyse, Cathy A.   +4 more
core   +16 more sources

Photoperiod Stress in Arabidopsis thaliana Induces a Transcriptional Response Resembling That of Pathogen Infection

Frontiers in Plant Science, 2022
Plants are exposed to regular diurnal rhythms of light and dark. Changes in the photoperiod by the prolongation of the light period cause photoperiod stress in short day-adapted Arabidopsis thaliana.
Anne Cortleven, Venja M. Roeber, Manuel Frank, Manuel Frank, Jonas Bertels, Vivien Lortzing, Gerrit T. S. Beemster, Thomas Schmülling   +7 more
doaj   +1 more source

Interactions between $β$-endorphin and kisspeptin neurons of the ewe arcuate nucleus are modulated by photoperiod [PDF]

Journal of Neuroendocrinology, In press, 2023
Opioid peptides are well-known modulators of the central control of reproduction. Among them, dynorphin coexpressed in kisspeptin (KP) neurons of the arcuate nucleus (ARC) has been thoroughly studied for its autocrine effect on KP release through $\kappa$ opioid receptors.
arxiv   +1 more source

Photoperiod effects in a freshwater community: Amphibian larvae develop faster and zooplankton abundance increases under an early‐season photoperiod

Ecology and Evolution, 2023
Organisms that shift their phenologies in response to global warming will experience novel photic environments, as photoperiod (daylength) continues to follow the same annual cycle.
Troy C. Neptune, Michael F. Benard
doaj   +1 more source

Photoperiod Insensitivity in Pigeonpea Introgression Lines Derived from Wild Cajanus Species

Agronomy, 2022
Pigeonpea is a photoperiod-sensitive crop; therefore, the introgression of photoperiod insensitivity could increase its adaptability to new environments.
Mohammad Ekram Hussain, Shivali Sharma, A. John Joel, Benjamin Kilian   +3 more
doaj   +1 more source

The Photoperiod: Handling and Causing Stress in Plants

Frontiers in Plant Science, 2022
The photoperiod, which is the length of the light period in the diurnal cycle of 24 h, is an important environmental signal. Plants have evolved sensitive mechanisms to measure the length of the photoperiod.
Venja M. Roeber, Thomas Schmülling, Anne Cortleven   +2 more
doaj   +1 more source

Effects of Different Photoperiods on the Growth and Nutritional Characteristics of Two Celery Cultivars in Plant Factory

Agronomy, 2023
Three different photoperiod treatments (8 h/16 h, 12 h/12 h, and 16 h/8 h of light/dark) were implemented to investigate the impact of growth, biomass, and phytochemical accumulation in two celery cultivars, namely ‘Zhangqiubaoqin’ (BQ) and ...
Qianwen Chu, Yanmei Qin, Chunyan Li, Shaobo Cheng, Lihong Su, Zhongqun He, Xiaoting Zhou, Dalong Shao, Xin Guo   +8 more
doaj   +1 more source