http://biblioteca.universia.net/vernivel.do?start=180&nivel=3107 Mostrando recursos 181 - 200 de 1,164 es http://biblioteca.universia.net/img/logotipo.jpg http://biblioteca.universia.net/ http://biblioteca.universia.net/ficha.do?id=42511118 Ginger autotetraploids were produced by immersing shoot tips in a 0.5% w/v colchicine,2% v/v dimethyl sulfoxide solution for 2 h. Stomatal measurements were used as an early indicator of ploidy differences in culture with mean stomata length of tetraploids (49.2 um)being significantly larger than the diploid (38.8 um). Of the 500 shoot tips treated, 2% were characterised as stable autotetraploid lines following field evaluation over several seasons. Results were confirmed with flow cytometry ... Smith, M.K.; Hamill, S.D.; Gogel, B.J.; Severn-Ellis, A.A. http://biblioteca.universia.net/ficha.do?id=43158404 We evaluated the role of the larval parasitoid, Diadegma semiclausum Hellén (Hymenoptera: Ichneumonidae), in controlling Plutella xylostella (L.) (Lepidoptera: Plutellidae) by cage exclusion experiments and direct field observation during the winter season in southern Queensland, Australia. The cage exclusion experiment involved uncaged, open cage and closed cage treatments. A higher percentage (54-83%) of P. xylostella larvae on sentinel plants were lost in the uncaged treatment than the clo... Wang, X.; Duff, J.; Keller, M.A.; Zalucki, M.P.; Liu, S.; Bailey, P. http://biblioteca.universia.net/ficha.do?id=43158530 To identify genes involved in papaya fruit ripening, a total of 1171 expressed sequence tags (ESTs) were generated from randomly selected clones of two independent fruit cDNA libraries derived from yellow and red-fleshed fruit varieties. The most abundant sequences encoded: chitinase, 1-aminocyclopropane-1-carboxylic acid (ACC) oxidase, catalase and methionine synthase, respectively. DNA sequence comparisons identified ESTs with significant similarity to genes associated with fruit softening,... Devitt, L.C.; Sawbridge, T.; Holton, T.A. http://biblioteca.universia.net/ficha.do?id=43158555 To identify genes involved in papaya fruit ripening, a total of 1171 expressed sequence tags (ESTs) were generated from randomly selected clones of two independent fruit cDNA libraries derived from yellow and red-fleshed fruit varieties. The most abundant sequences encoded:chitinase, 1-aminocyclopropane-1-carboxylic acid (ACC) oxidase, catalase and methionine synthase, respectively. DNA sequence comparisons identified ESTs with significant similarity to genes associated with fruit softening, ... Devitt, L.C.; Sawbridge, T.; Holton, T.A.; Mitchelson, K.; Dietzgen, R.G. http://biblioteca.universia.net/ficha.do?id=43158603 Kirramyces destructans is a serious pathogen causing a leaf, bud and shoot blight disease of Eucalyptus plantations in the subtropics and tropics of South-East Asia. During surveillance of eucalypt taxa trials in northern Queensland, symptoms resembling those of K. destructans were observed on Eucalyptus grandis and E. grandis × E. camaldulensis. Phylogenetic and morphological studies revealed that the Kirramyces sp. associated with these symptoms represents a new taxon described here as K. v... Andjic, V.; Barber, P.A.; Carnegie, A.J.; Pegg, G.S.; Hardy, G.E.S.J.; Wingfield, M.J.; Burgess, T. http://biblioteca.universia.net/ficha.do?id=43158643 Asia's increasing demand for both tropical and temperate fruit is projected to grow significantly. Compared with most developed countries, the production of temperate fruits (peach, nectarine, plum and apple) has expanded rapidly in China over the past 20 years. In contrast, current production of plums and peaches in neighbouring countries (Thailand and Vietnam) is very low but their fruit enters the market earlier. Thailand and Vietnam have enormous potential to satisfy a market window in th... Nissen, R.J.; George, A.P.; Broadley, R.H.; Newman, S.M.; Hetherington, S. http://biblioteca.universia.net/ficha.do?id=43158687 Globalisation is set to have a major impact on world horticultural production and distribution of fruit and vegetables throughout the world. In contrast to developing countries such as China, production and consumption of fresh fruit and vegetables in most developed countries is relatively static. For developed countries, we are starting to see consolidation in the number of farms producing fruit and vegetables with falling or static prices and real farm incomes. Global supply chains are now ... George, A.P.; Nissen, R.J.; Broadley, R.H. http://biblioteca.universia.net/ficha.do?id=43158900 The response of grasslands to disturbance varies with the nature of the disturbance and the productivity of the landscape. In highly productive grasslands, competitive exclusion often results in decreased species richness and grazing may allow more species to coexist. Once widespread, grasslands dominated by Dichanthium sericeum (Queensland bluegrass) and Astrebla spp. (Mitchell grass) occur on fertile plains but have been reduced in extent by cultivation. We tested the effects of exclusion o... Lewis, T.; Clarke, P.J.; Reid, N.; Whalley, R.D.B. http://biblioteca.universia.net/ficha.do?id=38558084 1.-Estudio y evaluación de nuevas especies autóctonas arbustivas, subarbustivas y herbáceas, originarias de regiones de clima mediterráneo de la Pení­nsula Ibérica y Baleares con la finalidad de favorecer la innovación y la diversificación de la oferta en las distintas utilizaciones ornamentales u paisajísticas: -Jardinerí­a exterior en clima mediterráneo. -Restauración paisajística. -Nuevas especies para flor cortada, planta de maceta y vede de corte. 2.-Puesta a punto de los métodos de prop... Cabot i Roig, Pere http://biblioteca.universia.net/ficha.do?id=43158409 In recent years, there has been increasing interest from growers, merchants, supermarkets and consumers in the establishment of a national mild onion industry. Imperative to the success of the emergent industry is the application of the National Mild Onion Certification Scheme that will establish standards and recommendations to be met by growers to allow them to declare their product as certified mild onions. The use of sensory evaluation techniques has played an imperative role throughout t... Reid, C.E.; Nottingham, S.M.; Bell, G.E.; Duff, A.A. http://biblioteca.universia.net/ficha.do?id=43158471 Ginger autotetraploids were produced by immersing shoot tips in a 0.5% w/v colchicine, 2% v/v dimethyl sulfoxide solution for 2 h. Stomatal measurements were used as an early indicator of ploidy differences in culture with mean stomata length of tetraploids (49.2 μm) being significantly larger than the diploid (38.8 µm). Of the 500 shoot tips treated, 2% were characterised as stable autotetraploid lines following field evaluation over several seasons. Results were confirmed with flow cytometr... Smith, M.K.; Hamill, S.D.; Gogel, B.J.; Severn-Ellis, A.A. http://biblioteca.universia.net/ficha.do?id=43158531 Alternative breeding strategies, based on colchicine-induced autotetraploids, have been proposed as a means of introducing disease resistance into banana breeding programs. This paper describes techniques for the in vitro induction of banana autotetraploids by the use of colchicine on cultured explants. The technique can be readily applied and large numbers of autotetraploids produced. The optimum treatment involved immersing shoot tips in a 0.5% w/v colchicine solution for 2 h under aseptic ... Hamill, S.D.; Smith, M.K.; Dodd, W.A. http://biblioteca.universia.net/ficha.do?id=43158532 The growth and performance of micropropagated ginger (Zingiber officinale Roscoe)was compared with 'seed'-derived plants in field trials conducted in south-eastern Queensland. In the first generation ex vitro, micropropagated plants had significantly (P<0.01) reduced rhizome yield with smaller knobs and more roots. Micropropagated plants had a greater (P<0.01) shoot: root (rhizome) ratio compared with seed-derived plants. Shoots from micropropagated plants were also significantly (P<0.01) sma... Smith, M.K.; Hamill, S.D. http://biblioteca.universia.net/ficha.do?id=43158553 We have characterised six Australian Cucumber mosaic virus (CMV) strains belonging to different subgroups, determined by the sequence of their complete RNA 3 and by their host range and the symptoms they cause on species in the Solanaceae, Cucurbitaceae and on sweet corn. These data allowed classification of strains into the known three CMV subgroups and identification of plant species able to differentiate the Australian strains by symptoms and host range. Western Australian strains 237 and ... Sulistyowati, E.; Mitter, N.; Bastiaan-netb, S.; Roossinck, M.J.; Dietzgen, R.G. http://biblioteca.universia.net/ficha.do?id=43158554 Ginger autotetraploids were produced by immersing shoot tips in a 0.5% w/v colchicine,2% v/v dimethyl sulfoxide solution for 2 h. Stomatal measurements were used as an early indicator of ploidy differences in culture with mean stomata length of tetraploids (49.2 um)being significantly larger than the diploid (38.8 um). Of the 500 shoot tips treated, 2% were characterised as stable autotetraploid lines following field evaluation over several seasons. Results were confirmed with flow cytometry ... Smith, M.K.; Hamill, S.D.; Gogel, B.J.; Severn-Ellis, A.A. http://biblioteca.universia.net/ficha.do?id=47047727 We evaluated the role of the larval parasitoid, Diadegma semiclausum Hellén (Hymenoptera: Ichneumonidae), in controlling Plutella xylostella (L.) (Lepidoptera: Plutellidae) by cage exclusion experiments and direct field observation during the winter season in southern Queensland, Australia. The cage exclusion experiment involved uncaged, open cage and closed cage treatments. A higher percentage (54-83%) of P. xylostella larvae on sentinel plants were lost in the uncaged treatment than the clo... Wang, X.; Duff, J.; Keller, M.A.; Zalucki, M.P.; Liu, S.; Bailey, P. http://biblioteca.universia.net/ficha.do?id=47047732 In recent years, there has been increasing interest from growers, merchants, supermarkets and consumers in the establishment of a national mild onion industry. Imperative to the success of the emergent industry is the application of the National Mild Onion Certification Scheme that will establish standards and recommendations to be met by growers to allow them to declare their product as certified mild onions. The use of sensory evaluation techniques has played an imperative role throughout t... Reid, C.E.; Nottingham, S.M.; Bell, G.E.; Duff, A.A. http://biblioteca.universia.net/ficha.do?id=47047794 Ginger autotetraploids were produced by immersing shoot tips in a 0.5% w/v colchicine, 2% v/v dimethyl sulfoxide solution for 2 h. Stomatal measurements were used as an early indicator of ploidy differences in culture with mean stomata length of tetraploids (49.2 μm) being significantly larger than the diploid (38.8 µm). Of the 500 shoot tips treated, 2% were characterised as stable autotetraploid lines following field evaluation over several seasons. Results were confirmed with flow cytometr... Smith, M.K.; Hamill, S.D.; Gogel, B.J.; Severn-Ellis, A.A. http://biblioteca.universia.net/ficha.do?id=47047873 To identify genes involved in papaya fruit ripening, a total of 1171 expressed sequence tags (ESTs) were generated from randomly selected clones of two independent fruit cDNA libraries derived from yellow and red-fleshed fruit varieties. The most abundant sequences encoded: chitinase, 1-aminocyclopropane-1-carboxylic acid (ACC) oxidase, catalase and methionine synthase, respectively. DNA sequence comparisons identified ESTs with significant similarity to genes associated with fruit softening,... Devitt, L.C.; Sawbridge, T.; Holton, T.A. http://biblioteca.universia.net/ficha.do?id=47047874 Alternative breeding strategies, based on colchicine-induced autotetraploids, have been proposed as a means of introducing disease resistance into banana breeding programs. This paper describes techniques for the in vitro induction of banana autotetraploids by the use of colchicine on cultured explants. The technique can be readily applied and large numbers of autotetraploids produced. The optimum treatment involved immersing shoot tips in a 0.5% w/v colchicine solution for 2 h under aseptic ... Hamill, S.D.; Smith, M.K.; Dodd, W.A.