68 resultados para Physiological Fruit Drop


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The reports are also published in the Annual report of the Department of Agriculture of the province of Ontario, and in the Sessional papers of the province of Ontario "Printed by order of the Legislative Assembly" [-1923] "Printed by order of ... Minister of Agriculture" [1924-] 25th, 1893- pub. by the Ontario Department of Agriculture, Toronto 1890 -1908 reports are bound with the corresponding annual reports of the Entomological Society of Ontario 1894 -1905 reports are bound with the corresponding annual reports of the Fruit Experiment Stations of Ontario 1906 -1910 reports are bound with the corresponding Report of the Fruit Branch, Dept. of Agriculture, Ontario

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The reports are also published in the Annual report of the Department of Agriculture of the province of Ontario, and in the Sessional papers of the province of Ontario "Printed by order of the Legislative Assembly" [-1923] "Printed by order of ... Minister of Agriculture" [1924-] 25th, 1893- pub. by the Ontario Department of Agriculture, Toronto 1890 -1908 reports are bound with the corresponding annual reports of the Entomological Society of Ontario 1894 -1905 reports are bound with the corresponding annual reports of the Fruit Experiment Stations of Ontario 1906 -1910 reports are bound with the corresponding Report of the Fruit Branch, Dept. of Agriculture, Ontario

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The reports are also published in the Annual report of the Department of Agriculture of the province of Ontario, and in the Sessional papers of the province of Ontario "Printed by order of the Legislative Assembly" [-1923] "Printed by order of ... Minister of Agriculture" [1924-] 25th, 1893- pub. by the Ontario Department of Agriculture, Toronto 1890 -1908 reports are bound with the corresponding annual reports of the Entomological Society of Ontario 1894 -1905 reports are bound with the corresponding annual reports of the Fruit Experiment Stations of Ontario 1906 -1910 reports are bound with the corresponding Report of the Fruit Branch, Dept. of Agriculture, Ontario

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The reports are also published in the Annual report of the Department of Agriculture of the province of Ontario, and in the Sessional papers of the province of Ontario "Printed by order of the Legislative Assembly" [-1923] "Printed by order of ... Minister of Agriculture" [1924-] 25th, 1893- pub. by the Ontario Department of Agriculture, Toronto 1890 -1908 reports are bound with the corresponding annual reports of the Entomological Society of Ontario 1894 -1905 reports are bound with the corresponding annual reports of the Fruit Experiment Stations of Ontario 1906 -1910 reports are bound with the corresponding Report of the Fruit Branch, Dept. of Agriculture, Ontario

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The reports are also published in the Annual report of the Department of Agriculture of the province of Ontario, and in the Sessional papers of the province of Ontario "Printed by order of the Legislative Assembly" [-1923] "Printed by order of ... Minister of Agriculture" [1924-] 25th, 1893- pub. by the Ontario Department of Agriculture, Toronto 1890 -1908 reports are bound with the corresponding annual reports of the Entomological Society of Ontario 1894 -1905 reports are bound with the corresponding annual reports of the Fruit Experiment Stations of Ontario 1906 -1910 reports are bound with the corresponding Report of the Fruit Branch, Dept. of Agriculture, Ontario

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The reports are also published in the Annual report of the Department of Agriculture of the province of Ontario, and in the Sessional papers of the province of Ontario "Printed by order of the Legislative Assembly" [-1923] "Printed by order of ... Minister of Agriculture" [1924-] 25th, 1893- pub. by the Ontario Department of Agriculture, Toronto 1890 -1908 reports are bound with the corresponding annual reports of the Entomological Society of Ontario 1894 -1905 reports are bound with the corresponding annual reports of the Fruit Experiment Stations of Ontario 1906 -1910 reports are bound with the corresponding Report of the Fruit Branch, Dept. of Agriculture, Ontario

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The reports are also published in the Annual report of the Department of Agriculture of the province of Ontario, and in the Sessional papers of the province of Ontario "Printed by order of the Legislative Assembly" [-1923] "Printed by order of ... Minister of Agriculture" [1924-] 25th, 1893- pub. by the Ontario Department of Agriculture, Toronto 1890 -1908 reports are bound with the corresponding annual reports of the Entomological Society of Ontario 1894 -1905 reports are bound with the corresponding annual reports of the Fruit Experiment Stations of Ontario 1906 -1910 reports are bound with the corresponding Report of the Fruit Branch, Dept. of Agriculture, Ontario

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The reports are also published in the Annual report of the Department of Agriculture of the province of Ontario, and in the Sessional papers of the province of Ontario "Printed by order of the Legislative Assembly" [-1923] "Printed by order of ... Minister of Agriculture" [1924-] 25th, 1893- pub. by the Ontario Department of Agriculture, Toronto 1890 -1908 reports are bound with the corresponding annual reports of the Entomological Society of Ontario 1894 -1905 reports are bound with the corresponding annual reports of the Fruit Experiment Stations of Ontario 1906 -1910 reports are bound with the corresponding Report of the Fruit Branch, Dept. of Agriculture, Ontario

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The reports are also published in the Annual report of the Department of Agriculture of the province of Ontario, and in the Sessional papers of the province of Ontario "Printed by order of the Legislative Assembly" [-1923] "Printed by order of ... Minister of Agriculture" [1924-] 25th, 1893- pub. by the Ontario Department of Agriculture, Toronto 1890 -1908 reports are bound with the corresponding annual reports of the Entomological Society of Ontario 1894 -1905 reports are bound with the corresponding annual reports of the Fruit Experiment Stations of Ontario 1906 -1910 reports are bound with the corresponding Report of the Fruit Branch, Dept. of Agriculture, Ontario

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Printed by order of the Legislative Assembly of Ontario.

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The reports are also published in the Annual report of the Department of Agriculture of the province of Ontario, and in the Sessional papers of the province of Ontario "Printed by order of the Legislative Assembly" [-1923]. "Printed by order of ... Minister of Agriculture" [1924-]. 25th, 1893- pub. by the Ontario Department of Agriculture, Toronto. 1890 -1908 reports are bound with the corresponding annual reports of the Entomological Society of Ontario. 1894 -1905 reports are bound with the corresponding annual reports of the Fruit Experiment Stations of Ontario. 1906 -1910 reports are bound with the corresponding Report of the Fruit Branch, Dept. of Agriculture, Ontario.

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The reports are also published in the Annual report of the Department of Agriculture of the province of Ontario, and in the Sessional papers of the province of Ontario. "Printed by order of the Legislative Assembly" [-1923]. "Printed by order of ... Minister of Agriculture" [1924-]. 25th, 1893- pub. by the Ontario Department of Agriculture, Toronto. 1890 -1908 reports are bound with the corresponding annual reports of the Entomological Society of Ontario. 1894 -1905 reports are bound with the corresponding annual reports of the Fruit Experiment Stations of Ontario. 1906 -1910 reports are bound with the corresponding Report of the Fruit Branch, Dept. of Agriculture, Ontario.

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A report done by Donald Ziraldo on the topic of Tree Fruit, specifically peach, in nurseries. The report was likely done while he was a student of the University of Guelph in the 1970s.

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Diatoms are renowned for their robust ability to perform NPQ (Non-Photochemical Quenching of chlorophyll fluorescence) as a dissipative response to heightened light stress on photosystem II, plausibly explaining their dominance over other algal groups in turbulent light environs. Their NPQ mechanism has been principally attributed to a xanthophyll cycle involving the lumenal pH regulated reversible de-epoxidation of diadinoxanthin. The principal goal of this dissertation is to reveal the physiological and physical origins and consequences of the NPQ response in diatoms during short-term transitions to excessive irradiation. The investigation involves diatom species from different originating light environs to highlight the diversity of diatom NPQ and to facilitate the detection of core mechanisms common among the diatoms as a group. A chiefly spectroscopic approach was used to investigate NPQ in diatom cells. Prime methodologies include: the real time monitoring of PSII excitation and de-excitation pathways via PAM fluorometry and pigment interconversion via transient absorbance measurements, the collection of cryogenic absorbance spectra to measure pigment energy levels, and the collection of cryogenic fluorescence spectra and room temperature picosecond time resolved fluorescence decay spectra to study excitation energy transfer and dissipation. Chemical inhibitors that target the trans-thylakoid pH gradient, the enzyme responsible for diadinoxanthin de-epoxidation, and photosynthetic electron flow were additionally used to experimentally manipulate the NPQ response. Multifaceted analyses of the NPQ responses from two previously un-photosynthetically characterised species, Nitzschia curvilineata and Navicula sp., were used to identify an excitation pressure relief ‘strategy’ for each species. Three key areas of NPQ were examined: (i) the NPQ activation/deactivation processes, (ii) how NPQ affects the collection, dissipation, and usage of absorbed light energy, and (iii) the interdependence of NPQ and photosynthetic electron flow. It was found that Nitzschia cells regulate excitation pressure via performing a high amplitude, reversible antenna based quenching which is dependent on the de-epoxidation of diadinoxanthin. In Navicula cells excitation pressure could be effectively regulated solely within the PSII reaction centre, whilst antenna based, diadinoxanthin de-epoxidation dependent quenching was implicated to be used as a supplemental, long-lasting source of excitation energy dissipation. These strategies for excitation balance were discussed in the context of resource partitioning under these species’ originating light climates. A more detailed investigation of the NPQ response in Nitzschia was used to develop a comprehensive model describing the mechanism for antenna centred non-photochemical quenching in this species. The experimental evidence was strongly supportive of a mechanism whereby: an acidic lumen triggers the diadinoxanthin de-epoxidation and protonation mediated aggregation of light harvesting complexes leading to the formation of quencher chlorophyll a-chlorophyll a dimers with short-lived excited states; quenching relaxes when a rise in lumen pH triggers the dispersal of light harvesting complex aggregates via deprotonation events and the input of diadinoxanthin. This model may also be applicable for describing antenna based NPQ in other diatom species.

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Across taxa, the early rearing environment contributes to adult morphological and physiological variation. For example, in birds, environmental temperature plays a key role in shaping bill size and clinal trends across latitudinal/thermal gradients. Such patterns support the role of the bill as a thermal window and in thermal balance. It remains unknown whether bill size and thermal function are reversibly plastic. We raised Japanese quail in warm (308C) or cold (158C) environments and then at a common intermediate temperature. We predicted that birds raised in cold temperatures would develop smaller bills than warm-reared individuals, and that regulation of blood flow to the bill in response to changing temperatures would parallel the bill’s role in thermal balance. Cold-reared birds developed shorter bills, although bill size exhibited ‘catch-up’ growth once adults were placed at a common temperature. Despite having lived in a common thermal environment as adults, individuals that were initially reared in the warmth had higher bill surface temperatures than coldreared individuals, particularly under cold conditions. This suggests that blood vessel density and/or the control over blood flow in the bill retained a memory of early thermal ontogeny. We conclude that post-hatch temperature reversibly affects adult bill morphology but irreversibly influences the thermal physiological role of bills and may play an underappreciated role in avian energetics