Product Physiology

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Low temperature and low light intensity storage to increase shelf-life of butterhead lettuce

We have found before that quality deterioration of lettuce during postharvest storage is delayed by low temperature in combination with very low light levels (about 5 ┬Ámol m-2 s-1). This is likely caused by ongoing photosynthesis ...


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Stomatal malfunction in Chrysanthemum and/or Arabidopsis

Stomatal malfunction leads to increased water loss and reduces postharvest keeping quality in plant products. It is induced by growing plants at high relative humidity (RH) and is an intriguing scientific and practical problem in modern horticulture. To reduce energy us in ...


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Transcription factors and quality traits

MYB transcription factors are involved in the regulation of many quality related traits, such as the biosynthesis of phenylpropanoids, anthocyanins, volatiles, but also cell shape, and stress resilience (Allan and Espley, 2018). We are interested in the MYB TF family of Petunia, because of many ...


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PH Quality by Laser Backscattering in blueberry

Blueberries are a soft fruit that are prone to quality disorders such as loss of firmness, mealiness and internal breakdown. Current methods to measure these disorders are either insufficient, subjective, or lacking. As such, there is a demand for objective ways to measure ...


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Modelling non-destructive firmness in pears

Non-destructive measurements of ripening-related firmness are generally strongly influenced by fruit dehydration. Vis-NIR and hyperspectral imaging, despite their sensitivity to water-related aspects in the fruit, can model ripening-related firmness to a certain extent, but this can certainly ...


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Dependency of firmness measurement devices on dehydration and ripening

Firmness is a key quality feature that is classically linked to ripeness. Over the last decades, an increasing number of non-destructive firmness measurement devices have been developed to assess the ripening-related firmness of products. However, ...


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Non-destructive quality measurements: image analysis

We are developing a colour cabinet together with Track32, a start-up that is specialized in computer vision and artificial intelligence. We are looking for a student that will set up the first pilot experiments, and pilot analyses. The colour cabinet can be used to segment individual ...


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RNAi based Postharvest Solutions

Recent developments on RNAi based technologies to protect plants are promising. Most applications are to protect plants against pathogens. In postharvest, reduction of respiration and ethylene signalling are essential to prolong shelf life/keeping quality. This is often done by lowering temperature ...


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Elucidating the expression of dormancy-associated transcription factors during strawberry winter dormancy

Winter dormancy is a physiologically important but time-consuming process. In vertical-farm cultivation of strawberries, dormancy requires cooling facilities which increase the already high costs of production. Identification ...


Questions or other ideas for thesis topics? Please contact the HPP student coordinator Katharina Hanika.