TIA-SAS Seminar Series

Start Date

3rd May 2013 3:30pm

End Date

3rd May 2013 4:30pm

Dr Morag Glen, Senior Research Fellow, Perennial Horticulture Centre, TIA
Dieback on Macquarie Island

Abstract: Azorella dieback on Macquarie Island.  A. macquariensis is a keystone species of the dominant feldmark vegetation on Macquarie Island. In recent years it has suffered from a severe dieback yet no causal agent could be isolated. In an attempt to determine whether a potential pathogen is associated with the die-back next-generation sequence technologies were used to characterise fungal bacterial and oomycete communities associated with healthy and die-back affected plants. A species of Rosellinia was the most frequently detected fungal species overall and was strongly associated with roots and rhizosphere soil of die-back affected plants. While Koch’s postulates must be fulfilled to demonstrate that this pathogen is a primary cause of the die-back on Macquarie Island, this finding provides strong evidence to support this hypothesis. Current attempts to isolate the pathogen responsible for Azorella dieback include techniques and semi-selective media suitable for this genus.

About the Speaker: Morag is a molecular biologist and mycologist with an interest in forest health, biodiversity and biosecurity of natural ecosystems as well as plantations. Current work is focussed mainly on root rots and rusts.

 

Abdelsalam Abobaker, Introductory PhD presentation (Supervisors: Dr. Sally Bound, Dr. Dugald Close and Dr. Nigel Swarts)
“Comparison of biological and chemical fertilisers on growth, yield and fruit quality in sweet cherry and apple”

Abstract: Recently, the demand for food increased due to the increase in the number of irregular populations around the world, particularly in poor and developing countries. In contrast, the efficiency of agriculture significantly decreased, for several reasons, for example, climate change and degradation of agricultural soils. May be a result of continuing to follow some techniques for long periods without rotation among different agricultural systems or combined with each other in a single system. It can be because the insufficient perception for a certain philosophy such organic or conventional agriculture, particularly in the present time. From this standpoint, the seminar will be presented briefly the three farming systems (organic, chemical and integrated) its advantages and disadvantages, and its implications for soil fertility. The aim of this study, to investigate the effects of biological chemical and integrated fertilisers on soil quality, nutrient availability and productivity and the growth of cherry and apple trees. The seminar will also display the mechanism of the application and design of these experiments.

About the Speaker: Abdelsalam Abobaker is from Libya, he has a scholarship from Libyan government for study in Australia. Abdelsalam has a MSc in Agricultural Science from the University of Omar AL-Mukhtar, Libya in 2009. He is doing PhD in horticultural science at University of Tasmania. He has been started in 1st of July 2012.