Browsing Masters Degrees (Botany) by Advisor "Berjak, Patricia."
Now showing items 1-18 of 18
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Aspects of the influence of temperature on the desiccation responses of seeds of Zizania palustris (Wild rice)
(1996)Seeds of wild rice (Zizania palustris var. interior) have been reported to show highest survival when dehydrated at 25 QC. It has also been reported that axis cells sustained least damage at this drying temperature. In ... -
Development of micropropagation protocols for selected indigenous plant species..
(1995)The herbal medicine trade is thriving in KwaZulu Natal with an ever-increasing number of people harvesting and trading in indigenous plants, especially those species with medicinal and/or magical properties. The number of ... -
Differing responses of embryonic axes of four recalcitrant-seeded species from temperate and tropical provenances to the procedures involved in cryopreservation.
(2016)Abstract available in PDF file. -
The effect of provenance on the response of the recalcitrant seeds of Trichilia dregeana to drying and chilling.
(2011)One of the factors that affect the post-harvest behavior of seeds is provenance. Different geographical locations are characterised by different environmental conditions, hence, plant materials harvested from different ... -
Effects of some of the procedural steps of cyropreservation on cryo-recalcitrant zygotic embryos of three amaryllid species producing desiccation-sensitive seeds.
(2013)Cryopreservation is the most promising method for the long-term conservation of germplasm of plants producing desiccation-sensitive seeds. While such seeds are generally termed recalcitrant in the context of conventional ... -
On the vacuolar system in maize roots.
(1979)Root-cap cells of Zea mays L proliferate by division in the cap meristem, and subsequently differentiate and mature as they move towards the periphery of the cap, where ' they undergo autolysis and are sloughed. Vacuolar ... -
Optimising methods for embryonic axis fixation and micropropagation of Syzygium cordatum Hochst.
(2009)Syzygium cordatum Hochst. (family - Myrtaceae), commonly called the umDoni (Zulu) tree, is found throughout South Africa. The tree is utilised for its fruit, bark and wood by many villagers, and this demand has placed ... -
Oxidative status and stress associated with cryopreservation of germplasm of recalcitrant-seeded species.
(2012)Genetic diversity of cultivated species and their wild relatives, as well as of wild species encompasses plant genetic resources or germplasm, the ex situ preservation of which embodies a critical aspect of biological ... -
The potential of hot water treatments for curtailing seed-associated mycoflora.
(1995)The consequences of toxigenic fungi associated with stored seed have stimulated these investigations aimed at developing treatments to minimise this mycoflora, without significantly reducing seed quality or viability. ... -
Some aspects of biological control of seed storage fungi.
(1995)Under storage conditions of ambient temperature and relative humidity in South Africa, seed-associated mycoflora proliferates. Fusarium moniliforme is ubiquitous in newly-harvested maize, persisting for variable periods ... -
Some aspects of megagametophyte development and post-shedding seed behaviour of Encephalartos natalensis (Zamiaceae)
(2009)Very little is known about the post-shedding seed behaviour and megagametophyte development of the cycads, the most primitive extant seed-bearing plants, which pre-date the dinosaurs. In the present investigation, seeds ... -
Some investigations of the responses of Quercus robur and Ekebergia capensis embryonic axes to dehydration and cryopreservation.
(2000)Recalcitrant seeds are those that are shed at high water contents, are actively metabolic throughout development, when they are, and remain, desiccation-sensitive, and may also be chilling sensitive. These properties ... -
Some investigations towards the cryopreservation of sugarcane germplasm.
(2009)Sugarcane has become an increasingly important crop in recent years, with South Africa featuring as one of the prominent producers. This has led to a significant growth in the South African sugarcane industry, translating ... -
Some invetsigations on the responses to desiccation and exposure to cryogenic temperatures of embryonic axes of Landolphia kirkii.
(2011)Landolphia kirkii is scrambling shrub forming an integral part of the flora along the coastal areas of north-eastern South Africa. The non-sustainable harvesting of fruit as food source, by monkeys and rural communities ... -
A study of some chilling responses of recalcitrant seeds of Avicennia marina (Forssk.) Vierh. and Ekebergia capensis Sparrm.
(2002)Seeds remain the most convenient and successful way for storing the genetic diversity of plant species and for producing new plants routinely for agriculture and horticulture. The importance of seed storage and the ability ... -
The effect of developmental status and excision injury on the success of cryopreservation of germplasm from non-orthodox seeds.
(2007)The zygotic germplasm of plant species producing desiccation-sensitive seeds can be conserved in the long-term only by cryopreservation. Usually the embryonic axis is excised from the cotyledons and is used as the explant ... -
Towards developing effective decontamination procedures for in vitro culture of embryonic axes excised from recalcitrant seeds.
(2013)Control of seed-associated micro-organisms is vital in reducing losses of plants of economic importance. Recalcitrant seeds being metabolically active and able to be stored only under conditions of high relative humidity ... -
Towards development of a cryopreservation protocol for germplasm of Podocarpus henkelii.
(2012)The trees belonging to the genus Podocarpus, of which only four species are native to South Africa, are renowned for their superior quality timber. Prior to 1880, Podocarpus henkelii, together with P. falcatus and P. ...