The concept of dynamic CA storage (DCA) involves the reduction of the oxygen level in the storage atmosphere to near the lowest level tolerated by the fruit, the so-called anaerobic compensation point. Fruit quality loss during DCA storage is presumed to be slowed down compared to normal ULO storage. Storage conditions below the critical oxygen level will cause anaerobic conditions followed by severe quality losses in stored fruit. Two methods based on RQ and fluorescence signal F-α monitoring have been tested to detect the critical oxygen concentration (ACP) during dynamic CA-storage (DCA) of several apple varieties. Both methods yielded identical oxygen values for ACP. ACPs found were at concentrations as low as 0.2 – 0.4%, depending on the apple variety. After the critical oxygen limit was reached, the oxygen concentration was increased by about 0.1 – 0.3% above the critical limit. In this way, fruits were held for 200 days at oxygen levels of 0.3% to 0.6% without causing physiological disorders. Fruit firmness values of DCA stored apples were in general significantly higher than those of ULO-stored control fruit after storage for about 200 days.
Plants and microorganisms can perceive and respond to sound waves. In a review of the literature, Agroscope analysed various publications on this topic. The studies show that sound can lead to positive effects on physiology in the form of improved growth, development and disease resistance.
The war in Ukraine, dry spells and droughts followed by heavy rainfall and flooding are major challenges for our food systems. But the problems that they bring to light are nothing new – and solutions are already to hand.
Biogenic amines in foods represent a health risk. Researchers from Agroscope and INRAE investigated the formation of these undesirable substances in raclette cheeses by the bacterium Morganella morganii.