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dc.contributor.authorMaclagan, Janet Frances Agnesen
dc.date.accessioned2019-02-15T14:34:26Z
dc.date.available2019-02-15T14:34:26Z
dc.date.issued1933en
dc.identifier.urihttp://hdl.handle.net/1842/35069
dc.description.abstracten
dc.description.abstractI. DATE OF FLOWERING AS AFFECTED BY CLIMATIC TEMPERATURE. Published Paper, from "Plant Physiology" (July 1933)en
dc.description.abstractAnalyses of records on the date of flowering of various members of different genera at the Royal Botanic Garden, Edinburgh, show the following points: 1. The actual date of flowering of any species in any one year may vary from the average date. 2. Such aberration is referable to the temperatures obtaining during narrow belts of time. 3. These belts of time vary between genera as to the remoteness from the actual date of flowering, and her a are referred to the periods of activity in gamete formation.en
dc.description.abstractII. STUDIES IN THE GERMINATION OF AIRA FLEXUOSAen
dc.description.abstractIt is apparent from the foregoing discussion that light sensitive seeds are also sensitive to temperature and substrate, being in general favourably affected as regards their germination by fluctuation of temperature, slight acidity of the substrate, or presence of nitrates in weak solution. Aira flexuosa, at least under the conditions of these experiments, is adversely affected by fluctuation of temperature, and practically unaffected by anid or potassium nitrate in weak solution, although it is light -sensitive.en
dc.description.abstractThe seeds of Aira flexuosa require a period of after- ripening for good germination, and in the after-ripened condition are less sensitive to external factors than in the un-after-ripened condition.en
dc.description.abstractIII. PHYSIOLOGICAL STUDIES IN BRASSICA ALBAen
dc.description.abstractThe tissue reaction of Brassica alba were determined by means of the "Range indicator Method". The plants investigated were grown throughout in a greenhouse at 45-60°F, thus eliminating possible variation due to variation of environmental conditions.en
dc.description.abstractThe epidermis and epidermal hairs were throughout, at ph 5.6.en
dc.description.abstractThe cortex, ground tissue of the petioles, palisade and mesophyll of the leaves were all at ph 5 °9.en
dc.description.abstractThe fibres of the cortex when present were at pH. 5.2 - 4.8.en
dc.description.abstractThe endodermis varied from ph 5 °9 to ph 4.8, being most acid at the base of the hypocotyl of the older plants.en
dc.description.abstractThe phloem and cambium were at ph 5.9.en
dc.description.abstractThe xylem was constantly one of the most acid tissues, being in general at pH 5.2 - 4.8 towards the base of the plant, and pH 5.6 further up.en
dc.description.abstractThe pith was at pH 5.9 throughout.en
dc.description.abstractThe piliferous layer of the root varied from pH 5.6 to pH 4.8.en
dc.description.abstractThe tissue reactionsof hrassica alba appear to be subject to much less variation than has been found in other genera by other workers.en
dc.description.abstractIV. THE BUFFER SYSTEM OF BRASSICA ALBAen
dc.description.abstractV. The Effect of the Mucilage of the Seed -Coat in Germination of Brassica albaen
dc.description.abstractVI. The Distribution of Starch in the Radicle of Brassica albaen
dc.publisherThe University of Edinburghen
dc.relation.ispartofAnnexe Thesis Digitisation Project 2019 Block 22en
dc.relation.isreferencedbyen
dc.titlePhysiological studies in seeds: germination, soil establishment, productionen
dc.typeThesis or Dissertationen
dc.type.qualificationlevelDoctoralen
dc.type.qualificationnamePhD Doctor of Philosophyen


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