Cell of the month: Allocasuarina verticillata shoots expressing GFP

2003 ◽  
Vol 5 (4) ◽  
pp. 284-284
Author(s):  
Sergio Svistoonoff
Keyword(s):  
Allocasuarina Verticillata

scholarly journals Comparison of Nodule Induction in Legume and Actinorhizal Symbioses: The Induction of Actinorhizal Nodules Does Not Involve ENOD40

2003 ◽  
Vol 16 (9) ◽  
pp. 808-816 ◽  
Author(s):  
Carole Santi ◽  
Uritza von Groll ◽  
Ana Ribeiro ◽  
Maurizio Chiurazzi ◽  
Florence Auguy ◽  
...  
Keyword(s):  
Expression Pattern ◽  
Host Plants ◽  
Root Nodule ◽  
Higher Plants ◽  
Expression Patterns ◽  
Lotus Japonicus ◽  
Casuarina Glauca ◽  
Actinorhizal Plant ◽  
Allocasuarina Verticillata ◽  
Actinorhizal Nodules

Two types of root nodule symbioses are known for higher plants, legume and actinorhizal symbioses. In legume symbioses, bacterial signal factors induce the expression of ENOD40 genes. We isolated an ENOD40 promoter from an actinorhizal plant, Casuarina glauca, and compared its expression pattern in a legume (Lotus japonicus) and an actinorhizal plant (Allocasuarina verticillata) with that of an ENOD40 promoter from the legume soybean (GmENOD402). In the actinorhizal Allocasuarina sp., CgENOD40-GUS and GmENOD40-2-GUS showed similar expression patterns in both vegetative and symbiotic development, and neither promoter was active during nodule induction. The nonsymbiotic expression pattern of CgENOD40-GUS in the legume genus Lotus resembled the nonsymbiotic expression patterns of legume ENOD40 genes however, in contrast to GmENOD40-2-GUS, CgENOD40-GUS was not active during nodule induction. The fact that only legume, not actinorhizal, ENOD40 genes are induced during legume nodule induction can be linked to the phloem unloading mechanisms established in the zones of nodule induction in the roots of both types of host plants.

Genetic Transformation of Allocasuarina verticillata

2000 ◽  
pp. 1-14
Author(s):  
C. Franche ◽  
A. N’Diaye ◽  
C. Gobé ◽  
C. Alloneau ◽  
D. Bogusz ◽  
...  
Keyword(s):  
Genetic Transformation ◽  
Allocasuarina Verticillata

The glossy black-cockatoo (Calyptorhynchus lathami halmaturinus) spends little time and energy foraging on Kangaroo Island, South Australia

2005 ◽  
Vol 53 (3) ◽  
pp. 177 ◽  
Author(s):  
Tamra F. Chapman ◽  
David C. Paton
Keyword(s):  
Food Supply ◽  
Small Proportion ◽  
Foraging Behaviour ◽  
Time Budget ◽  
South Australia ◽  
Breeding Birds ◽  
Additional Energy ◽  
Allocasuarina Verticillata ◽  
Risk Of Predation ◽  
Time And Energy

The endangered Kangaroo Island glossy black-cockatoo (Calyptorhynchus lathami halmaturinus) relies entirely on the seeds of the drooping sheoak (Allocasuarina verticillata) for food. The time budget of the glossy black-cockatoos and their foraging behaviour was recorded to provide an indication of whether their food supply was likely to be limiting. The foraging behaviour of non-breeding and breeding cockatoos was also compared to record the strategy they used to collect the additional energy needed to raise young. Glossy black-cockatoos spent a relatively small proportion of their time foraging, suggesting that the food supply was abundant in the habitats used for feeding. Non-breeding birds spent only 26% of their time feeding and breeding birds spent only 36% of their time feeding. The cockatoos spent 0.4% of their time flying, foraged in a mean of only five trees per day and harvested cones in no more than five bouts per tree. This shows that the cockatoos made few movements between drooping sheoaks and within the canopy of the sheoaks when foraging. When breeding, the cockatoos spent significantly more time per day foraging, cropped cones in significantly more bouts per tree and harvested significantly more cones per tree than non-breeding birds. This shows that breeding birds increased their energy intake without greatly increasing movement between trees. The small number of movements made by glossy black-cockatoos when foraging on Kangaroo Island reflects the abundance of food trees and may be a strategy to reduce the risk of predation.

Comparison of four constitutive promoters for the expression of transgenes in the tropical nitrogen-fixing tree Allocasuarina verticillata

2005 ◽  
Vol 24 (9) ◽  
pp. 540-548 ◽  
Author(s):  
Mariana Obertello ◽  
Carole Santi ◽  
Mame-Oureye Sy ◽  
Laurent Laplaze ◽  
Florence Auguy ◽  
...  
Keyword(s):  
Nitrogen Fixing ◽  
Allocasuarina Verticillata

Genetic diversity and population genetic structure in fragmented Allocasuarina verticillata (Allocasuarinaceae) – implications for restoration

2011 ◽  
Vol 59 (8) ◽  
pp. 770 ◽  
Author(s):  
Linda M. Broadhurst
Keyword(s):  
Genetic Diversity ◽  
Genetic Structure ◽  
Population Genetic Structure ◽  
Population Genetic ◽  
Gene Diversity ◽  
Natural Populations ◽  
Long Distance ◽  
Study Region ◽  
Allocasuarina Verticillata ◽  
Seed Crops

Vegetation restoration in fragmented regions is constrained by limited supplies of high quality seed and an understanding of the scale over which seed can be moved without causing negative outcomes. ‘Local’ seed is often prescribed for restoration but in fragmented landscapes this restricts collecting to small, inbred populations. Six polymorphic microsatellites were used to examine genetic diversity and population genetic structure in seed collected from 18 fragmented natural populations and three restored populations of the wind-pollinated and dispersed tree Allocasuarina verticillata, a key restoration species. Smaller populations produced seed crops with significantly fewer alleles, lower allelic richness and less gene diversity. Most of the populations assessed, including the restored sites, produce genetically diverse seed crops suitable for restoration but smaller populations (<30 plants) should be augmented with seed from larger populations. Principal coordinate analysis, graph-theory and Bayesian analyses found little evidence of spatially predictable genetic structure across the study region, which probably reflects long distance gene dispersal preventing the development of strong spatial structure. The absence of strong spatial patterns suggests that seed can be moved beyond current 5–50-km limits while being mindful of strong selection gradients or conditions that might indicate locally adapted populations.

Transformation and Regeneration of a Nitrogen-Fixing Tree, Allocasuarina Verticillata Lam.

1991 ◽  
Vol 9 (5) ◽  
pp. 461-466 ◽  
Author(s):  
Michèle Phelep ◽  
Annik Petit ◽  
Lori Martin ◽  
Emile Duhoux ◽  
Jacques Tempé
Keyword(s):  
Nitrogen Fixing ◽  
Allocasuarina Verticillata

Casuarina ecology: factors limiting cone production in the drooping sheoak, Allocasuarina verticillata

2007 ◽  
Vol 55 (2) ◽  
pp. 171 ◽  
Author(s):  
Tamra F. Chapman ◽  
David C. Paton
Keyword(s):  
Soil Nutrients ◽  
Slow Release ◽  
Tree Size ◽  
Foraging Efficiency ◽  
Small Female ◽  
Important Species ◽  
Available N ◽  
Cone Production ◽  
Allocasuarina Verticillata ◽  
Large Trees

Allocasuarina verticillata is an important species for biodiversity conservation on Kangaroo Island (South Australia) because it is the primary food source for the endangered glossy black-cockatoo, Calyptorhynchus lathami halmaturinus. Two potentially limiting factors, pollen and soil nutrients, were studied in the context of A. verticillata as foraging habitat for glossy black-cockatoos. Cone production was not limited by the amount of pollen available to female plants. The soils on which A. verticillata occurs on Kangaroo Island were low in nutrients. Available N, P and K were significantly increased via the application of slow-release fertiliser and the added nutrients resulted in a corresponding increase in the productivity of A. verticillata. The additional nutrients increased the number of cones produced on female branches, branch growth and potentially therefore, tree size. Since cone profitability appears to increase with tree size, the additional growth may also result in greater cone profitability in the long term. Adding slow-release fertiliser to small female A. verticillata trees and revegetation on sites with higher concentrations of soil nutrients would benefit the cockatoos. This is because other studies have shown that the cockatoos increase their foraging efficiency by cropping cones from large trees with greater cone profitability and branches with high densities of cones.

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