Photosynthetica 2021, 59(SI):422-437 | DOI: 10.32615/ps.2021.033

Chlorophyll fluorescence imaging for process optimisation in horticulture and fresh food production

W.B. HERPPICH
Department of Horticultural Engineering, Leibniz-Institute for Agricultural Engineering and Bioeconomy, Max-Eyth-Allee 100, 14469 Potsdam, Germany

Chlorophyll a fluorescence analysis (CFA) has been accepted to study postharvest activity and stability of photosynthesis of vegetables and salad greens, and some fruits. Commercial chlorophyll fluorescence imaging (CFI) systems may provide additional insight into spatial and temporal dynamics of photosynthesis. This yields valuable information on the effects of postharvest handling and processing (sorting, cutting, packaging, etc.) on physiological activity and 'internal quality' of green produce, and its changes. Here, meaning and physiological basics of relevant fluorescence parameters is briefly summarised, while major focus is on recent applications of CFI to evaluate quality and quality maintenance during postharvest handling and minimal processing of fresh fruits and vegetables. CFI is given surprisingly little attention in the monitoring of postharvest quality, although it is suitable for adjusting and/or optimising innovative postharvest techniques. Knowledge of the physiological base and the limit of interpretation is indispensable for meaningful interpretations of results to draw correct consequences.

Additional key words: internal quality; photosystem II; plant physiology; postharvest research; postharvest processing.

Received: February 16, 2021; Revised: June 7, 2021; Accepted: June 18, 2021; Prepublished online: July 19, 2021; Published: July 23, 2021  Show citation

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HERPPICH, W.B. (2021). Chlorophyll fluorescence imaging for process optimisation in horticulture and fresh food production. Photosynthetica, 59(SPECIAL ISSUE), 422-437. doi: 10.32615/ps.2021.033
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