Understanding plant uptake of organic and inorganic nitrogen for optimal fertiliser application in forestry. Nitrogen (N) in soils occurs in both organic and inorganic forms. Plants can take up inorganic N - nitrate and ammonium - but, on average, these account for only 5% of the soluble N in soils. Recent evidence suggests that plants may be able to tap into some of the 95% of N that occurs in organic forms. We will investigate the importance of organic N uptake for two plantation Eucalyptus sp ....Understanding plant uptake of organic and inorganic nitrogen for optimal fertiliser application in forestry. Nitrogen (N) in soils occurs in both organic and inorganic forms. Plants can take up inorganic N - nitrate and ammonium - but, on average, these account for only 5% of the soluble N in soils. Recent evidence suggests that plants may be able to tap into some of the 95% of N that occurs in organic forms. We will investigate the importance of organic N uptake for two plantation Eucalyptus species by tracing the uptake of different N forms by bacteria, fungi and eucalypts. This information will redefine what is meant by 'available N' and will guide the development of a new test for soil N status.Read moreRead less
Hybridisation and gene flow in Eucalyptus. We propose to use a molecular approach to study hybridisation in eucalypts. We will study the genetic barriers to gene flow and provide base-line data to assess the potential threat of genetic pollution from exotic plantations to our native forest gene pools. We will concentrate our studies on species of subgenus Symphyomyrtus which includes all the major plantation species. This will allow us to extend our long-running studies of hybridisation towar ....Hybridisation and gene flow in Eucalyptus. We propose to use a molecular approach to study hybridisation in eucalypts. We will study the genetic barriers to gene flow and provide base-line data to assess the potential threat of genetic pollution from exotic plantations to our native forest gene pools. We will concentrate our studies on species of subgenus Symphyomyrtus which includes all the major plantation species. This will allow us to extend our long-running studies of hybridisation towards understanding the dynamics and consequences of genetic invasion and help develop guidelines to minimise the risk of genetic pollution.Read moreRead less