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Protocols in ecological and environmental plant physiology

 
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Australian Journal of Botany Australian Journal of Botany
Volume 62 Number 2 2014


Review of the phytogeography of Cape York Peninsula: a flora that illustrates the development of the Australian sclerophyll biota 
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Bruce Wannan blank image
pp. 85-113
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Cape York Peninsula has a rich diversity of vegetation types including rainforest, woodlands and grasslands. The Peninsula contains a mix of recently evolved plants and those with ancient relationships back into the Cenozoic. It is significant because its plants demonstrate the development of the Australian vegetation from rainforest to grassland.

  
 

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Unravelling the evolutionary history of Eucalyptus cordata (Myrtaceae) using molecular markers 
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Peter A. Harrison , Rebecca C. Jones , René E. Vaillancourt , Robert J. E. Wiltshire and and Brad M. Potts blank image
pp. 114-131
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Eucalyptus cordata is a rare species confined to south-eastern Tasmania, where its growth habit ranges from a stunted, multi-stemmed shrub to tall forest trees in small, isolated populations. With DNA markers, we found that its evolutionary history was closely associated with the endangered E. morrisbyi and that whereas some populations of E. cordata are relicts of the distant past, others showed evidence of recent evolution (e.g. subspecies quadrangulosa). The species appears to be genetically healthy with normal levels of genetic diversity.

  
 

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Carbohydrate mobilisation in germinating seed of Enterolobium contortisiliquum and Peltophorum dubium (Fabaceae), two tropical trees used for restoration 
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Marina Belloni Veronesi , Kelly Simões , Nelson Augusto dos Santos-Junior and and Marcia Regina Braga blank image
pp. 132-140
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Legume species are used for restoration of degraded areas. We compared the reserve degradation during germination of two tropical seed legumes used in restoration. Although with different reserve tissues and ecological behaviour, starch is not used during germination and early seedling growth in both species.

  
 

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Germination of mucilaginous seeds of Plantago albicans (Plantaginaceae): effects of temperature, light, pre-sowing treatments, osmotic stress and salinity 
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L. Veiga-Barbosa and and F. Pérez-García blank image
pp. 141-149
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Plantago albicans is a perennial herbaceous plant widely distributed throughout the Mediterranean region. Presence of mucilage on P. albicans seeds increased germination percentages and germination rate at all temperatures tested. Increased osmotic stress and salinity caused a decrease in germination percentages and delayed germination rate. The degree of salt tolerance shown by this species may be sufficient to permit seed germination at the levels of salinity found in the soils of its natural habitat.

  
 

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Functional groups in Lychnophorinae (Asteraceae: Vernonieae) based on morphological and anatomical traits 
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Makeli Garibotti Lusa , Beatriz Appezzato-da-Glória , Benoît Loeuille , Giacomo Bartoli and and Daniela Ciccarelli blank image
pp. 150-163
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One of the most interesting topics in ecology is how plants are able to live in extreme habitats. By analysing leaf and stem characters of 12 Asteraceae, we were able to circumscribe four groups of plants with peculiar adaptations to the Cerrado Domain and the open areas of the Atlantic Forest. This investigation provides important contributions to the understanding of the responses of Lychnophorinae species to different environments.

  
 

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Genetic diversity and biogeography of the boab Adansonia gregorii (Malvaceae: Bombacoideae) 
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Karen L. Bell , Haripriya Rangan , Rachael Fowler , Christian A. Kull , J. D. Pettigrew , Claudia E. Vickers and and Daniel J. Murphy blank image
pp. 164-174
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Despite the iconic presence of the boab (Adansonia gregorii) in the Kimberley region of northwestern Australia, little is known of its evolutionary history. We examined genetic variation across the region and found weak but significant divergence between east and west and between coastal and inland populations; significant ancient population size reduction and significant gene flow were also revealed.

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