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Jennet Blake

Bio: Jennet Blake is an academic researcher from University of London. The author has contributed to research in topics: Annona squamosa & Sugar-apple. The author has an hindex of 11, co-authored 15 publications receiving 518 citations.
Topics: Annona squamosa, Sugar-apple, Shoot, Kinetin, Ethylene

Papers
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Journal ArticleDOI
TL;DR: Reliable microtuber production has been obtained by culturing nodal expiants of potato on Murashige and Skoog medium without the addition of growth regulating substances.

148 citations

Journal ArticleDOI
TL;DR: Production de structures organisees obtenues a partir de cals issus de plants de cocotier representer un progres vers l'obtention de plantules clonales de Cocos nucifera.

66 citations

Journal ArticleDOI
TL;DR: For both liquid and semi-solid media an essentially constant ratio of free BAP: AC-bound BAP was reached between 5 and 10 days after preparation of the media, and the inclusion of the combined macro- and micronutrients markedly reduced the availability of free 2,4-D in the medium.
Abstract: The rate of adsorption of 6-benzylaminopurine (BAP) and 2,4-dichlorophenoxyacetic acid (2,4-D) by activated charcoal (AC) from liquid and semi-solid tissue culture media was determined using 8-[14C]-BAP and 2-[14C]-2′,4′-D. For both liquid and semi-solid media an essentially constant ratio of free BAP: AC-bound BAP was reached between 5 and 10 days after preparation of the media. Pronounced increases in the level of available 2,4-D in the medium occurred, when either the initial BAP or 2,4-D level or both were raised to 5 × 10−4 M. When 2,4-D was used at 5 × 10−4 M the medium component sucrose (40 g l−1) caused a pronounced increase in available 2,4-D. Conversely the inclusion of the combined macro- and micronutrients markedly reduced the availability of free 2,4-D in the medium.

64 citations

Journal ArticleDOI
TL;DR: A complete micropropagation system using juvenile or mature explants of soursop (Annona muricata L.), a tropical fruit tree, was developed and Adventitious bud and shoot proliferation were achieved from hypocotyls of seedlings.
Abstract: SummaryA complete micropropagation system using juvenile or mature explants of soursop (Annona muricata L.), a tropical fruit tree, was developed. Adventitious bud and shoot proliferation were achieved from hypocotyls of seedlings. Lateral shoots were stimulated from the initiated meristems in nodal explants of mature trees. Increasing concentrations of BAP added to the basic Woody Plant Medium stimulated up to four or five shoots per explant in nodal cuttings or hypocotyls, respectively. The addition of NAA with BAP was essential for outgrowth of buds. Rooting was stimulated by galactose and NAA after explants were preconditioned for two weeks in a plain medium containing 10 g l-1 of activated charcoal. The rooted plantlets were acclimatized successfully.

43 citations

Journal ArticleDOI
TL;DR: Of the cytokinins tested, benzylaminopurine (BAP) was more effective than either 2-isopentenyladenine (2iP) or kinetin (Kin) and produced maximum proliferation when used at 5×10-6M.
Abstract: Successful vegetative propagation of seedling jackfruit (Artocarpus heterophyllus Lam.) has been achieved by in vitro methods. Proliferation from nodal explants was greater than from shoot tips. Of the cytokinins tested, benzylaminopurine (BAP) was more effective than either 2-isopentenyladenine (2iP) or kinetin (Kin) and produced maximum proliferation when used at 5×10-6M. Shoot proliferation was optimal at 30°C with a 12 h photoperiod. Optimal rooting of shoots in vitro was obtained with indolebutyric acid (IBA) at 10-6M. The number and length of roots was significantly increased in 12 h light as compared with the dark.

40 citations


Cited by
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Journal ArticleDOI
TL;DR: The effect of AC on growth regulator uptake is still unclear but some workers believe that AC may gradually release certain adsorbed products, such as nutrients and growth regulators which become available to plants.

403 citations

BookDOI
01 Jan 2007
TL;DR: This work focuses on the role of salicylic acid in the induction of abiotic stress tolerance and its role in plant disease resistance in the context of Rhizobium-legume symbiosis.
Abstract: Preface. Contributors. 1. Salicylic acid: Biosynthesis, metabolism and physiological role in plants S. Hayat, B. Ali and A. Ahmad 2. Effects of salicylic acid on the bioproductivity of plants A. Larque-Saavedra and R. Martin-Mex 3. Effect of salicylic acid on solute transport in plants M.S. Krasavina 4. Role of hormonal system in the manifestation of growth promoting and antistress action of salicylic acid F.M. Shakirova 5. Role of salicylic acid in the induction of abiotic stress tolerance T. Janda, E. Horvath, G. Szalai and E. Paldi 6. The role of salicylates in Rhizobium-legume symbiosis and abiotic stresses in higher plants F. Mabood and D. Smith 7. Stress and antistress effects of salicylic acid and acetyl salicylic acid on potato culture technology H.A. Lopez-Delgado, I.M. Scott and M.E. Mora-Herrera 8. Salicylic acid and reactive oxygen species in the activation of stress defense genes L. Holuigue, P. Salinas, F. Blanco and V. Garreton 9. The interplay between salicylic acid and reactive oxygen species during cell death in plants J.F. Dat, N. Capelli, F. van Breusegem 10. Salicylic acid as a defense-related plant hormone: Roles of oxidative and calcium signaling paths in salicylic acid biology T. Kawano and T. Furuichi 11. Salicylic acid and local resistance to pathogens I.V. Maksimov and L. G. Yarullina 12. Salicylic acid in plant disease resistance R. Chaturvedi and J. Shah 13. Transcriptomic analysis of salicylic acid-responsive genes in tobacco BY-2 cells I. Galis and K.Matsuoka Index.

346 citations

Journal ArticleDOI
TL;DR: Its addition to culture medium may promote or inhibit in vitro growth, depending on species and tissues used, and the effects of activated charcoal may be attributed to establishing a darkened environment and adsorption of undesirable/inhibitory substances.
Abstract: Activated charcoal is commonly used in tissue culture media. Its addition to culture medium may promote or inhibit in vitro growth, depending on species and tissues used. The effects of activated charcoal may be attributed to establishing a darkened environment; adsorption of undesirable/inhibitory substances; adsorption of growth regulators and other organic compounds, or the release of growth promoting substances present in or adsorbed by activated charcoal.

327 citations

Book ChapterDOI
07 Jul 2010

294 citations

Journal ArticleDOI
TL;DR: Progress is being made into understanding the regulatory mechanisms that are expressed under abiotic stress to maintain cellular homeostasis, as well as in the ability to genetically transform crop plants with genes from alien species.
Abstract: Summary Breeding for adaptation to abiotic stress is extremely challenging due to the complexity of the target environments as well as that of the stress-adaptive mechanisms adopted by plants. While many traits have been reported in the literature, these must be considered with respect to the type of environment for which a cultivar is targeted. In theory, stress-adaptive traits can be divided into groups whose genes and/or physiological effects are likely to be relatively independent such that when parents with contrasting traits are crossed, adaptive genes will be pyramided. Currently the following groups of candidate traits are being considered for drought adaptation in wheat: traits relating to: (i) pre-anthesis growth, (ii) water extraction, (iii) water use efficiency, (iv) photo-protection. A number of mechanisms relating to root function have potential to ameliorate drought stress. Hydraulic redistribution (HR) of water by roots of dryland shrubs enables even relatively small amounts of rainwater to be moved down into the soil profile actively by the root system before it evaporates from the soil surface. Another example is the symbiotic relationship of plants with mycorrhizal fungi that produce a glycoprotein that has a positive effect on soil structure and moisture characteristics. From an agronomic point of view, crop water use efficiency can be increased by exploiting the stress-adaptive mechanism whereby leaves reduce transpiration rate in response to a chemical root signal in response to drying soil. While there is limited genetic diversity for adaptation to salinity in wheat, tolerance has been found in the ancestral genomes of polyploid wheat and their relatives associated with sodium exclusion into the xylem. Wide crossing techniques such as production of synthetic hexaploids are being exploited to tap into this source of genetic diversity. Looking further into the future, progress is being made into understanding the regulatory mechanisms that are expressed under abiotic stress to maintain cellular homeostasis, as well as in the ability to genetically transform crop plants with genes from alien species.

263 citations