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Activity budget of Rhinopithecus bieti at Tibet:Effects of day length,temperature and food availability

Current Zoology 2010年第6期56卷 650-659页

作者： Zuofu XIANG Sheng HUO Wen XIAO College of Life Science and Technology Central South University of Forestry and Technology Changsha 410004 China Kunming Institute of Zoology Chinese Academy of Sciences Kunming 650229 Yunnan China Institute of Eastern-Himalaya Biodiversity Research Dali University Dali 671000 Yunnan China

How animals allocate their time to various activities has significant consequences for their survival because they reflect the different constraints on time-energy balances. Many ecological variables, such as day length, temperature, food availabil- ity, are supposed to effect on activity budgets allocation of temperate primates. To examine the potential influence of these three variables, the activity budgets ofRhinopithecus bieti was studied at Xiaochangdu, Tibet from June 2003 to March 2005. Pearson correlations were utilized to assess potential relationships between activity budget and day length, food availability and temperature, and stepwise multiple regressions to identify the priority of resting and other activities （activities besides feeding, moving and resting）. Time spent resting and doing ＂other activities＂ is positively related to day length, temperature and food availability. No significant correlations were found between feeding/moving time and any of these variables. This suggests that foraging time （feeding ＋ moving） takes priority over rest and other activities. day length and foraging time （as independent variables） were related to the time spent in the other two activities besides feeding/moving （as dependent variables）. Both time spent resting and in ＂other activities＂ were highly significant positive functions of day length, with the latter a highly significant negative function of feeding time and moving time. Resting time may therefore be interpreted as taking priority over ＂other activities＂ time. These results provide further evidence of the importance of day length, temperature and food availability to seasonal activity budgets [Current Zoology 56 （6）： 650q559, 2010].

关键词： Activity budget Rhinopithecus bieti day length Temperature Food availability Activity pattem

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Thermal and photoperiodic requirements of the seedling stage of three tropical forest species

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Journal of Forestry Research 2023年第1期34卷 209-220页

作者： Fabrina Bolzan Martins Mábele de Cássia Ferreira Flávia Fernanda Azevedo Fagundes Gabriel Wilson Lorena Florêncio Natural Resource Institute Federal University of ItajubáItajubáMinas Gerais 37500-903Brazil

Air temperature and photoperiod play an important role in the seedling development for tropical forest *** variables are sensitive to climate,and so evaluating thermal and photoperiodic effects on seedling development is fundamental,especially for climate change *** to quantify thermal time and the energy required for plants to reach a development stage include air temperature and cardinal *** photoperiod will also affect physiological reactions of a plant and thus its *** we evaluated the six thermal time methods widely used to compute thermal requirement,and identified the influence of the photoperiod from the 2015 and2016 growing seasons and 12 sowing dates in Itajubá,Minas Gerais state,Brazil,on seedling development of three native tropical forest species Psidium guajava L.(Myrtaceae),Citharexylum myrianthum Cham.(Verbenaceae),and Bixa orellana L.(Bixaceae).The method used to quantify thermal time influenced the analytical results of seedling development;the one that considered three cardinal temperatures and compared them with the mean air temperature(Method5)performed better in computing thermal *** influence of photoperiod on seedling development was inconclusive for the three species,but all three developed better in mild temperatures(between 13.3℃and 26.9℃)with a photoperiod shorter than 13 h.

关键词： Phyllochron Thermal time day length Seedling stage Phenology

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GIGANTEA Shapes the Photoperiodic Rhythms of Thermomorphogenic Growth in Arabidopsis

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Molecular Plant 2020年第3期13卷 459-470页

作者： Young-Joon Park Jae Young Kim June-Hee Lee Byoung-Doo Lee Nam-Chon Paek Chung-Mo Park Department of Chemistry Seoul National UniversitySeoul 08826Korea Department of Plant Science Seoul National UniversitySeoul 08826Korea Plant Genomics and Breeding Institute Seoul National UniversitySeoul 08826Korea These authors contributed equally to this article

Plants maintain their internal temperature under environments with fluctuating temperatures by adjusting their morphology and architecture,an adaptive process termed ***,the rhythmic patterns of plant thermomorphogenesis are governed by day-length ***,it remains elusive how thermomorphogenic rhythms are regulated by ***,we show that warm temperatures enhance the accumulation of the chaperone GIGANTEA(Gl),which thermostabilizes the DELLA protein,REPRESSOR OF ga1-3(RGA),under long days,thereby attenuating PHYTOCHROME INTERACTING FACTOR 4(PIF4)-mediated *** contrast,under short days,when Gl accumulation is reduced,RGA is readily degraded through the gibberellic acid-mediated ubiquitination-proteasome pathway,promoting thermomorphogenic *** data indicate that the GI-RGA-PIF4 signaling module enables plant thermomorphogenic responses to occur in a day-length-dependent *** propose that the Gl-mediated integration of photoperiodic and temperature information shapes thermomorphogenic rhythms,which enable plants to adapt to diel fluctuations in day length and temperature during seasonal transitions.

关键词： thermomorphogenesis day length Gl RGA PIF4

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Phenological study of Sargassum thunbergii (Fucales, Phaeophyta) in Lidao Bay, Rongcheng, China

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Chinese Journal of Oceanology and Limnology 2016年第3期34卷 498-506页

作者：刘玮吴海一詹冬梅段德麟 Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China University of Chinese Academy of Sciences Beijing 100049 China Marine Biology Institute of Shandong Province Qingdao 266100 China

We conducted a phenological evaluation of Sargassum thunbergii, a common algal species, along the coast of Lidao Bay, Rongcheng, China. The local S. thunbergii population entered a maturation period from early June to mid-August, when seawater temperature was 14.4 to 25. 1℃. Our results suggest an increase in temperatttre and day length during this period initiated thalli maturation. Inhabitants of the low tidal zone had higher thalli length and biomass compared with those from the mid- and high tidal zones. We observed a switch in the length frequency distribution and contribution of length classes to biomass between the small （〈20 cm） and long （20-79.9 cm） length classes at the time of thallus maturity. This suggests there is a trade-off between sexual reproduction and vegetative regeneration.

关键词： Sargassum thunbergii temperature day length tidal position length hierarchy

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Effects of Sowing Time on the Seed Yield of Quinoa (Chenopodium quinoa Willd) in South Kanto, Japan

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Agricultural Sciences 2016年第3期7卷 146-153页

作者： Katsunori Isobe Hikaru Sugiyama Daisuke Okuda Yudai Murase Hiroki Harada Misa Miyamoto Syunsuke Koide Masao Higo Yoichi Torigoe College of Bioresource Sciences Nihon University Kanagawa Japan

The objective of the present study was to determine the optimum sowing time of three quinoa ecotypes (Altipllano, sea level, and valley) for high seed yields in south Kanto, Japan. Pot experiments were conducted in the experimental field at Nihon University during 2011, 2012, 2013, and 2014. In this experiment, the following quinoa varieties were used NL-6, Baer Cajon and Cauquenes (sea-level type), Amarilla de Marangani, Blanca de Junin, CICA-127, ECU-420, ECU-525, Ingapirica, and Narino (valley type), 94R and Isluga (Altiplano type). The quinoa seeds were sown on March 29, June 17 and September 22, 2011;March 27, June 17 and August 28, 2012;March 26, June 15 and 5 September 5, 2013;and March 27, June 17 and August 28, 2014. When the sea-level type and Altiplano type seeds were sowed from March to September, the seeds could be gained in all sowing plots. However, the seed weights of all varieties were the highest in the sowing plots of March. And the seed weights in the sowing plot of March were significantly higher than that in the other sowing plots. The sea-level type and Altiplano type quinoa had almost the same seed growth reaction for day length and day temperature. Thus, to gain a high seed yield of the sea-level and Altiplano type quinoa, March was the optimum sowing time in south Kanto, Japan. When the valley-type seeds were sowed from March to June, the seeds could not be gained, except in 2012. In 2012, the seed weights and seed numbers in sowing plots of March and June were significantly lower than those in the sowing plot of September. Thus, to obtain a high seed yield of the valley type quinoa, the optimum sowing time in south Kanto, Japan was from August to September.

关键词： day length day Temperature Ecotype Sowing Time Quinoa

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Study on the genetic mechanism for abnormal heading in hybrid rice

Study on the genetic mechanism for abnormal heading in hybri...

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2016年全国植物生物学大会

作者： Shaobo Wei Chao Xiang Hongjun Zhang Lijun Qu Yongming Gao Institute of crop science Chinese Academy of Agricultural Sciences

Heading stage is the transitional stage from vegetative growth to reproductive growth stage. The length of heading date is mainly determined by photoperiod sensitivity(PS),temperature sensitivity(TS) and basic vegetative growth(BVG) in rice. We developed a BC2F3 population by using the recurrent parent Shuhui 527 and the recipient parent Fuhui 838 in the backcross breeding process,then the BC2F3 introgression lines were crossed with four male sterile lines(Xieqingzao A,Gang46 A,Ⅱ-32 A and Jin23A),a part of hybrid combinations of which can′t flower in some long day areas,i.e Hefei,but obviously late heading in some short day areas i.e Sanya. This phenomenon of abnormal heading was considered as ?big green rice?. A total of 12 QTL for Photoperiod sensitivity was found in more than two environments or populations by using the one-way ANOVA. By two-way ANOVA,a total of 31 pairs of QTL were detected. The results of Rice SNP50 chip in Peking University showed that se5,phy A and Oslf may be upstream photosensitive genes,which causing abnormal heading of those hybrid combinations derived from the crosses between introgression lines and Gang46 A. These genes delayed the flowering time by repressing other genes in the flowering pathway such as Ehd1 and Hd1. These results lay a foundation for RNA-seq analysis and SNP genotype analysis to identify the differentially expressed flowering genes and the genetic mechanism of hybrid rice ?big green rice?.

关键词： hybrid rice heading date day length photoperiod sensitive genes

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