In 1982, Jameson was awarded a PhD from the University of Canterbury, with a thesis titled A study on the role of cytokinins in the development of starch accumulating structures.

[3][4] In the 1980s, Jameson gave evidence of her research findings in a controversial case involving the fertiliser Maxicrop.

Fertiliser company Bell-Booth Ltd contended that Jameson was on the verge of a major breakthrough of great significance to New Zealand.

However, Jameson's results were challenged by international scientists appearing for the Ministry of Agriculture and Forestry (New Zealand), who determined that the fertiliser would have to be applied at the rate of 98,000 litres/ha to elicit a response.

[8] In the 2021 Queen's Birthday Honours, Jameson was appointed an Officer of the New Zealand Order of Merit, for services to plant science.