Physiological plant studies in South Africa Part I : wilting and osmotic phenomena of grasses and other plants under arid conditions

dc.contributor.authorHenrici, M.
dc.contributor.editorDu Toit, P.J.
dc.date.accessioned2020-11-03T08:41:07Z
dc.date.available2020-11-03T08:41:07Z
dc.date.created2020
dc.date.issued1926
dc.descriptionThe articles have been scanned in colour with a HP Scanjet 5590; 300dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format.en_ZA
dc.description.abstractA description of the meteorological, tellurical, and edaphic features of a typical farm in the semi-arid region of Bechuanaland is given, and the osmotic behaviour of the local flora recorded. The differences between suction force of grasses and of plants other than grasses are recorded in relation to soil moisture, atmospheric humidity, rainfall, and insolation. The phenomenon of wilting is explained upon the basis of the osmotic gradient between root and leaf, withering commencing in most grasses, under the conditions of soil and climate investigated, when the difference exceeds 0.2 molar sucrose. The local grasses display no morphological mechanism for protection against drought and show enormous variations in osmotic values. The other plants which survive throughout the year display various protective devices of an anatomical and physiological nature, and are characterized by high suction force. Those for which the lifecycle is confined to the brief rainy season of summer show low values incapable of much variation. Quantitative protocols are compared with figures on European plants and with the very scanty data available for arid regions in other parts of the world.en_ZA
dc.description.librarianab2020en_ZA
dc.format.extent57 pages : black & white photos, tablesen_ZA
dc.format.mediumPDFen_ZA
dc.identifier.citationHenrici, M 1926, ‘Physiological plant studies in South Africa. Part I: wilting and osmotic phenomena of grasses and other plants under arid conditions’, 11th and 12th Reports of the Director of Veterinary Education and Research Part 1, pp. 619-668.en_ZA
dc.identifier.issn0330-2465
dc.identifier.urihttp://hdl.handle.net/2263/76680
dc.language.isoenen_ZA
dc.publisherPretoria : Government Printer and Stationery Officeen_ZA
dc.rights©1926 Union of South Africa, Dept. of Agriculture (original). © 2017 University of Pretoria. Dept. of Library Services (digital).en_ZA
dc.subjectVeterinary reportsen_ZA
dc.subjectVeterinary medicineen_ZA
dc.subjectGrasses -- Osmotic valueen_ZA
dc.subjectPlants -- Suction forceen_ZA
dc.subjectBechuanaland -- Semi-arid regionen_ZA
dc.subject.lcshVeterinary medicine -- South Africa
dc.titlePhysiological plant studies in South Africa Part I : wilting and osmotic phenomena of grasses and other plants under arid conditionsen_ZA
dc.typeArticleen_ZA
dc.typeTexten_ZA

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