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Plant stress analysis: application of prompt, delayed chlorophyll fluorescence and 820 nm modulated reflectance. Insights from independent experiments. | LitMetric

AI Article Synopsis

  • Nine studies tested plant responses to various abiotic stresses (drought, salt, ozone, UV) using two M-PEA units across different plant types (woody evergreen, woody deciduous, herbaceous).
  • The research measured three signals: Prompt Fluorescence (PF), Delayed Fluorescence (DF), and Modulated Reflectance (MR), finding consistent changes in PF and MR parameters under stress, like decreases in F(V)/F(M) and increases in V(J).
  • Principal Component Analysis (PCA) indicated that using PF and MR together is an effective method for assessing plant stress, with MR revealing physiological strategies unique to different plant functional groups.

Article Abstract

Nine short-term independent studies were carried out with two M-PEA units on several plant species differing in their functional traits (woody evergreen, woody deciduous, herbaceous) and exposed to different kind of abiotic stress (drought, salt, ozone, UV radiation). Aim of the study is to check the consistency of plant responses, assessed through three sets of simultaneously measured signals: Prompt Fluorescence (PF), Delayed Fluorescence (DF) and Modulated Reflectance of 820 nm light (MR). The decrease of F(V)/F(M) and F0, the increase of V(J) and V(I) were the most common responses related to PF parameters.The decrease of vox and vred as well the increase of MR min were common response of MR. DF showed species-treatment specific behaviours. The Principal Component Analysis (PCA) suggests that the combination of PF and MR parameters represents a powerful tool for plant stress phenotyping, whereas MR parameters are linked to physiological strategies, related to different functional groups, to cope with stress factors.

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Source
http://dx.doi.org/10.1016/j.plaphy.2014.11.002DOI Listing

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