Robert Setter Director-General, DPI&F

Robert Setter Director-General, DPI&F

Queensland summer is synonymous with fresh, chilled seafood but thanks to new research at the Department of Primary Industries and Fisheries it could now be even better. We like to call it our ´fresh approach´ to food. As consumers become more sophisticated, informed and demanding, so too must the food industry. DPI&F scientists are supporting food industry development by researching the natural preservative properties of Australian native products such as lemon myrtle in order to extend the shelf-life of convenient seafood products.

So why use Australian native plants? Most plants have natural properties to protect and defend themselves from microbial attacks and these can be harnessed to provide protection for fresh foods. But most importantly, when the amazing flavours of Queensland seafood are combined with unique flavours from Australian native products it creates a taste sensation that has many and varied applications. For instance, DPI&F food scientists in partnership with the Australian Native Foods Institute Limited are working on minced fish balls with Tasmanian pepper, sea parsley and lemon myrtle with very positive outcomes from initial consumer testings.

The basis for this work is to have a greater understanding of the flavour, health and additional benefits these unique Australian products offer chefs and ultimately consumers. This means that not only will consumers get great products with unique Australian flavours, but they will benefit from the goodness of replacing synthetic preservatives with natural ingredients.

We are also interested in stirring the imagination! And this is where we look to chefs and the seafood industry. Our science focuses on product development and understanding what native ingredients work with what foods, but it is the imagination of these groups that will create the links in the chain that will result in a strong and sustainable future for the industry.

My imagination tells me that the recognition and popularity of Australian native ingredients is set to blossom.

Avoiding Pyrrolizidine Alkaloid Contamination in Herbal Raw Material and Tea

Avoiding Pyrrolizidine Alkaloid Contamination in Herbal Raw Material and Tea

Pyrrolizidine alkaloids (PAs) are a group of naturally occurring alkaloids based on the structure of pyrrolizidine. PAs are produced by plants as a defense mechanism against insect herbivores. Due to their potential detrimental health effects, pyrrolizidine alkaloids (PA) must be avoided in food and beverages.

PA in Tea and Herbal Infusions

The German Federal Institute for Risk Assessment (BfR) raised concern on the occurrence of pyrrolizidine alkaloids (PAs) in teas and herbal infusions on the market in 2013. In response the UE has implemented a testing method for 28 PA substances and has been checking all raw materials on PA. Traces of PA in tea and herbal raw materials were detected, indicating a contamination by foreign plant components. By now there is solid proof that crops can be contaminated with pyrrolizidine-producing weeds, and the alkaloids find their way into the finished product.

The following 28 PA substances are currently checked for:
Echimidin, echimidin-N-oxide, erucifolin, erucifolin-N-oxide, europin, europin N-oxide, heliotrin, heliotrin N-oxide, intermedin, intermedin N-oxide, jacobin, jacobin-N-oxide, lasiocarpin, lasiocarpin N-oxide, lycopsamin, lycopsamin N-oxide, monocrotalin, monocrotalin N-oxide, retrorsin, retrorsin N-oxide, senecionin, senecionin N-oxide, seneciphyllin, seneciphyllin N-oxide, senecivernin, senecivernin-N-oxide, senkirkin, trichodesmin.

Health effects: Pyrrolizidine alkaloids are reported to be hepatotoxic, that is, damaging to the liver. They are also supposed to be tumorigenic and can cause hepatic veno- occlusive disease and liver cancer. Hence, the consumer expects a zero tolerance regarding PA in tea and infusion products.

Source of Pyrrolizidine Alkaloids

Pyrrolizidine alkaloids are primarily found in the following plant families:
1. Asteracea family (Compositae): in plants of the Senecioneae subtribe (the genus Senecio is prevalent) and the Eupatorieae subtribe (mainly in the genera Eupatorium and Ageratum).
2. Boraginaceae family: in virtually all plants of this family (e.g. borage and comfrey)
3. Fabaceae family (Leguminosae): in the subtribe Crotalariaceae, mainly in the genus Crotalaria, but also in the genera Chromolaena and Lotononis.

How to avoid PA Contamination

Prevention of exposure remains the only effective method of limiting toxicity due to PAs. As foreign plants are the major source of PA contamination in herbal raw material and tea, utmost care has to be taken in order to establish and keep fields and plantations and their surroundings clean and control weed growth. The following measures need to be implemented:

 toxic PA-containing flora growing in the region, particularly those that may or do grow along the respective crop should be identified;
 all suspected plant species should be checked for their PA content in specialized laboratories;

 appropriate agro-technical practices should be followed for the prevention/control of PA-containing plants in crop fields and plantations. Aside from the use of herbicides, manual weeding shall be considered to minimize occurrence of critical weeds plants;

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 viable systems shall be developed for the routine inspection of fields prior to harvest to detect the presence of PA-containing plants;
 if the crop is found to be contaminated, immediate steps must be taken to remove the toxic plants from the fields at two critical stages: prior to flowering and again, prior to the harvest.

Please note: the presence of only 10 toxic plants (such as Senecio) per hectare can lead to a critical contamination of a raw material lot! Please also take note that all plant parts contain PA, including seeds.

Wild crafting:
All persons involved in the harvesting of wild plants must ensure that only the desired plant is collected. In the course of collection, care must be taken to ensure that no foreign plants or toxic weeds can mix with the harvested crop and confusion (due to ignorance or bad faith) in the collection of different species is avoided.

Training & education:
All persons involved in the cultivation, collection, and handling of raw materials shall be properly informed and systematically trained regarding the importance of avoiding PA contamination and the above mentioned measures. Training material such as visual hand- out for weeding crews and / or collectors shall be developed.

Australian Native Food Industry

Australian Native Food Industry

Welcome to Australian Native Food Industry Limited

Formed in 2006, ANFIL is the peak national body which represents all interests in the rapidly growing Australian native food industry. The company is a not-for-profit organisation with broad involvement in the development of this industry on a national scale. Encompassing national advocacy and lobbying on behalf of the industry, ANFIL has taken the lead in working with industry, federal and state governments to determine and prioritise research and development as well as market development strategies to progress the industry into the future.

ANFIL acknowledge’s the traditional owners of this land, we also acknowledge the cultural importance of native food. We wish to share knowledge and information to move this industry forward to benefit all Australians.