Keeping Food Fresh for Longer: Challenges & Solutions<br />Amanda J Able<br />
Reactive oxygen species and source enzymes  during plant-pathogen interactions: contribution to programmedcell death<br />
Current research<br />
Know the Physiology of the Produce <br />
Know the Physiology of the Produce <br />Climacteric produce = technology<br />Prevent ethylene response and respiration<b...
From ethylene treatment up to consumer use<br />From harvest time until ripening<br />Green life<br />Shelf life<br />Matu...
1-Methylcyclopropene (1-MCP)<br />C4H6<br />ethylene action inhibitor<br />blocks ethylene receptors in plant cells<br />D...
BUT there are variable responses to 1-MCP<br />What impacts physiological responses during ripening?<br />Time of year at ...
Current research<br />
Fully red fruit is needed for spice production = pungency + colour<br />
BUT fruit are once-over harvested = all stages<br />Green-harvested fruit do NOT ripen properly<br />WHY? NON-CLIMACTERIC?...
C2H4<br />Conclusions<br />unknown ripening signal (usually from mother plant)<br />Carbon supply<br />ripening <br />fact...
 Effect of calcium and boron nutrition on grey mould development<br />
Current research<br />
Which apple do you buy? Why?<br />Survey by Yusoff & Able 2008<br />
NUTRITIONAL QUALITY?????<br />
Keeping Food Fresh for Longer: Challenges & Solutions<br />Amanda J Able<br />
politicians<br />Distributors<br />research<br />Processors<br />Restaurants<br />Transport<br />Grower<br />So just who i...
So just who is the consumer?<br /> Dependant upon the value chain<br />Can we improve that value chain?<br />
Potential solutions?<br /> So many factors<br />Quality is a phenotype<br />Genetics<br />Environment<br />Pre-farm<br />P...
Know thine enemy: Potential solutions to maintain quality<br /> Amendments to soil<br /> Pesticides?<br /> Postharvest<br ...
Know thine enemy: Potential solutions to maintain quality<br /> Amendments to soil<br /> Pesticides?<br /> Postharvest<br ...
IMMEDIATE BENEFIT<br />VERSUS<br />FUTURE BENEFIT<br />
IMMEDIATE BENEFIT VS FUTURE BENEFIT??<br />Challenge post-farm gate<br />Health benefits?<br />Antioxidants or bioactive c...
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Keeping food fresh

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In order to keep horticultural produce fresh for longer, members of the supply chain have various post-harvest solutions available to them. However the effectiveness of these technologies is reliant upon an understanding of the physiology of the produce.

The laboratory of Dr Amanda J. Able at the University of Adelaide’s Waite Campus focuses upon gaining this understanding and the development of suitable post-harvest technologies.

Current research includes:
- developing the use of the ethylene action inhibitor, 1-methylcyclopropene (1-MCP), as a tool to extend shelf life of banana and determining the impact of 1-MCP on aroma, volatiles and consumer acceptability;
- understanding why capsicum does not ripen when harvested green;
- the effect of Ca and B application (pre- and post-harvest) on the development of grey mould; and;
- the effect of 1-MCP and controlled atmosphere storage on health qualities of apples (such as antioxidant content).

However, there is a real need to link post-harvest technology with an increase in the long term benefits that could be derived from food (especially for human health). The Able laboratory is now seeking to examine the impact of post-harvest technologies on bioactive compounds, their bioavailability and impact on human health.

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Keeping food fresh

  1. 1. Keeping Food Fresh for Longer: Challenges & Solutions<br />Amanda J Able<br />
  2. 2. Reactive oxygen species and source enzymes during plant-pathogen interactions: contribution to programmedcell death<br />
  3. 3.
  4. 4.
  5. 5.
  6. 6.
  7. 7. Current research<br />
  8. 8. Know the Physiology of the Produce <br />
  9. 9. Know the Physiology of the Produce <br />Climacteric produce = technology<br />Prevent ethylene response and respiration<br />
  10. 10. From ethylene treatment up to consumer use<br />From harvest time until ripening<br />Green life<br />Shelf life<br />Maturation RipeSenescence Death<br />Harvest Storage or export C2H4Market<br /> (few weeks) <br />VERY SHORT!<br />
  11. 11. 1-Methylcyclopropene (1-MCP)<br />C4H6<br />ethylene action inhibitor<br />blocks ethylene receptors in plant cells<br />Do not perceive ethylene<br />Ripening doesn’t start<br />Potential<br />Cheap, easy to apply, less toxic than other inhibitors<br />
  12. 12. BUT there are variable responses to 1-MCP<br />What impacts physiological responses during ripening?<br />Time of year at harvest<br />Fruit position on the bunch<br />Ethylene concentration/duration<br />Timing of application<br />Temperature<br />Recommendation to industry BUT….<br />
  13. 13.
  14. 14. Current research<br />
  15. 15. Fully red fruit is needed for spice production = pungency + colour<br />
  16. 16. BUT fruit are once-over harvested = all stages<br />Green-harvested fruit do NOT ripen properly<br />WHY? NON-CLIMACTERIC?<br />
  17. 17. C2H4<br />Conclusions<br />unknown ripening signal (usually from mother plant)<br />Carbon supply<br />ripening <br />factors<br />PROTEOMICS & METABOLOMICS<br />
  18. 18. Effect of calcium and boron nutrition on grey mould development<br />
  19. 19. Current research<br />
  20. 20. Which apple do you buy? Why?<br />Survey by Yusoff & Able 2008<br />
  21. 21. NUTRITIONAL QUALITY?????<br />
  22. 22.
  23. 23. Keeping Food Fresh for Longer: Challenges & Solutions<br />Amanda J Able<br />
  24. 24. politicians<br />Distributors<br />research<br />Processors<br />Restaurants<br />Transport<br />Grower<br />So just who is the consumer?<br /> Dependant upon the value chain<br />
  25. 25. So just who is the consumer?<br /> Dependant upon the value chain<br />Can we improve that value chain?<br />
  26. 26. Potential solutions?<br /> So many factors<br />Quality is a phenotype<br />Genetics<br />Environment<br />Pre-farm<br />Post-farm<br />vs.<br />
  27. 27. Know thine enemy: Potential solutions to maintain quality<br /> Amendments to soil<br /> Pesticides?<br /> Postharvest<br />Refrigeration<br />Controlling ethylene<br />Controlling respiration<br /> Genetic<br />Breeding<br />Genetic modification<br />
  28. 28. Know thine enemy: Potential solutions to maintain quality<br /> Amendments to soil<br /> Pesticides?<br /> Postharvest<br />Refrigeration<br />Controlling ethylene<br />Controlling respiration<br /> Genetic<br />Breeding<br />Genetic modification<br />BUT SUPPLY CHAIN (CONSUMER) -DRIVEN<br />
  29. 29. IMMEDIATE BENEFIT<br />VERSUS<br />FUTURE BENEFIT<br />
  30. 30. IMMEDIATE BENEFIT VS FUTURE BENEFIT??<br />Challenge post-farm gate<br />Health benefits?<br />Antioxidants or bioactive compounds<br />Bioavailability<br />Maintenance during storage?<br />Impact of other technologies<br />Changing multiple components?<br />

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