Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 39 for “"day length"”.
-
Modulation of plant growth by day length dependent regulation of the TOR signaling pathway
… time keeping mechanism that informs the plant of day length duration (photoperiod). The TOR (Target of Rapamycin) kinase pathway is a central hub where cellular energy levels are perceived and translated into specific growth responses across kingdoms. In plants, the TOR pathway has been associated …
-
Environmental factors, pasture composition, growth rate and puberty in growing Thoroughbreds
… the young horse. This coincides with changes in day length, temperature, and progesterone concentrations. The change in growth, from slow to rapid in young horses has been associated with various forms of developmental orthopedic disease. The objective of this study was to distinguish …
-
Päivänpituuden ja proheksadioni-kalsiumin vaikutus jatkuvasatoisen mansikan vegetatiiviseen ja generatiiviseen kehitykseen
… in everbearing strawberries is enhanced by long day length. Yield potential can also be increased by using chemical growth regulators, like prohexadione-calcium (ProCa). This inhibitor of gibberellin biosynthesis enhances crown branching and flowering, and prevents runner formation. Yield …
-
The Influence of the Length of the School Day on the Percentage of Proficient and Advanced Proficient Scores on the New Jersey Assessment of Skills and Knowledge for Grades 6, 7, and 8
… study aimed to explain the influence of the length of the school day on the total percentage of students who scored Proficient or Advanced Proficient (TPAP) on the New Jersey Ask (NJ ASK) in both Language Arts and Mathematics in Grades 6-8. The data analyzed included the length of the school …
-
Phenological and Cultural Studies of Common Dandelion (Taraxacum officinale Weber)
… with precipitation, temperature, or day length. Length of stem was positively correlated with temperature and day length. The plants exhibited diurnal variation in flowering habit. Number of times (or days) the heads opened and closed, length of time in which the heads remained open …
-
Seasonal Reproduction in the Male Black Bear Ursus Americanusc and Male Polar Bear Ursus Maritimus
… and polar bear (Ursus maritimus) are long day seasonal breeders. Males undergo testicular regression during the non-mating season and testicular recrudescence during the pre-mating season. The present investigation was undertaken to begin to study the role of serum FSH, LH, and particularly …
-
Photoperiod, Brain Plasticity, and Behavior
… individuals rely upon an environmental signal (day length) to alter gene expression in order to produce the suite of season-specific adaptations. Photoperiodism is the ability of plants and animals to measure environmental day length (photoperiod) to ascertain the time of year and engage in …
-
Modeling neuroscience patient flow and inpatient bed management
… more than 900 inpatient beds. On an average weekday, the hospital admits about 220 patients, with the emergency department (ED) and the operating rooms (OR) being the main sources of admissions. Given MGH's high occupancy rates, a comparable number of discharges have to occur daily, and the …
-
Exploring the role of auxin in phenotypic plasticity in Arabidopsis thaliana root development
… regulate root formation with a focus on day length and growth temperature and found that elevated temperature and increased day length positively regulate root formation. We explored several mechanisms by which root initiation is enhanced under these conditions including elevated auxin …
-
A Survey of Photoperiodic Response and Morphological Variation Across a Latitudinal Gradient in Threespine Stickleback
… variation in photoperiodic response, the day length cue was used to time sexual maturation and morphological characters across these various scales. Using lab-reared lines, we developed an index of sexual maturation and experimentally determined critical photoperiod for Alaskan and Oregon …
-
Characterising GIGANTEA interactors: the BELL-LIKE HOMEODOMAIN 3 and BELL-LIKE HOMEODOMAIN 10 proteins
… conditions. An important flowering time cue is day length and it is proposed that light signals are perceived and measured by an interaction between photoreceptors and an internal pacemaker, the circadian clock. The control of flowering has been best characterised in the model plant Arabidopsis …
-
Understanding the mechanisms of the photoperiod flowering pathway in soybean
… (Glycine max). Chapter One introduces the long day dicot model species Arabidopsis thaliana that serves as the paradigm of understanding the genetic basis of flower transition. The six flowering pathways of A. thaliana are described in detail to introduce the reader to the complex molecular …
-
AN HMA DOMAIN-CONTAINING PROTEIN NaKR1 REGULATES LONG-DISTANCE FLORIGEN MOVEMENT IN ARABIDOPSIS THALIANA
PLANTS PERCEIVE SEASONAL CHANGES IN DAY LENGTH IN LEAVES AND CONSEQUENTIALLY TRIGGER LONG-DISTANCE SIGNALING TO INDUCE FLOWERING AT THE SHOOT APEX. IN A. THALIANA, PART OF THE MOBILE FLOWERING SIGNALS CALLED FLORIGEN HAS BEEN IDENTIFIED AS THE FLOWERING LOCUS T (FT) PROTEIN, WHICH IS INDUCED BY THE …
-
Investigating hydrogen peroxide dynamics and the role of plasma membrane aquaporin PIP1:4 in plant sensitivity to ozone.
… growth at chronic elevated ozone of 150ppb 8 h/day, though significant increases in leaf H2O2 content were only found in wildtype Col and overexpressing line OE4.2. In response to acute ozone exposure, 350 ppb for 6 h only caused H2O2 accumulation in Cvi plants, associated with the development …
-
Stochastic dynamic optimization approach for revegetation of reclaimed mine soils under uncertain weather regime
… between plant growth, air temperature, day length, leaf area, photoperiod and plant-soil-moisture stresses. A plant available soil moisture model was adopted to estimate daily soil moisture for mine soils. A general probability model was developed to estimate the probability of …
-
Spatial and Temporal Patterns of Anadromous Fish Passage at Boshers Dam Vertical Slot Fishway on the James River, Richmond, Virginia
… determined that the best predictor of increased daytime American shad passage is higher water temperatures and discharge and for increased daytime sea lamprey passage, a higher water temperature and increasing water temperature trend. Day length, and indirectly, barometric pressure also played a …
-
Control of sexual maturation and growth in Atlantic cod (Gadus morhua) by use of cold cathode light technology
… temperature and photoperiod. The decreasing day-length during autumn acts as a cue for the cod to initiate the maturation process. Therefore, it may be possible to prevent precocious maturation with extended photoperiods during the latter half of the year. The present work tests the effect of …
-
Spatio-temporal analysis of florigenic signals in Arabidopsis thaliana, Sinapis alba and Brassica napus
Daylength is one of several parameters controlling flowering time in many plant species. The day length is perceived in leaves, but how the floral signal is transduced to the shoot apex via the phloem to induce flowering remains to be elucidated. This study aimed at the identification of new …
-
Greenhouse climate model : an aid to estimate the influence of supplemental lighting on greenhouse climate
… Iceland's weather has a seasonal change in the length of day and night, creating unique weather phenomena. In midwinter, there is a period where darkness prevails. In midsummer, daylight takes over and night darkness is almost absent during June and July. Artificial lighting and movable blackout …
-
Functional analysis of candidate flowering time genes from the model legume Medicago truncatula
… resources and which flowers in response to long day length and vernalisation (winter cold) conditions. A putative Medicago Polycomb Repressive Complex 2 (PRC2) subunit VERNALISATION2 (MtVRN2) was characterised previously in the Putterill laboratory, whose mutation led to early flowering. This …
Page 1 of 2