2020
DOI: 10.3390/rs12081312
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Relation of Photochemical Reflectance Indices Based on Different Wavelengths to the Parameters of Light Reactions in Photosystems I and II in Pea Plants

Abstract: Measurement and analysis of the numerous reflectance indices of plants is an effective approach for the remote sensing of plant physiological processes in agriculture and ecological monitoring. A photochemical reflectance index (PRI) plays an important role in this kind of remote sensing because it can be related to early changes in photosynthetic processes under the action of stressors (excess light, changes in temperature, drought, etc.). In particular, we previously showed that light-induced changes in PRIs… Show more

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Cited by 30 publications
(63 citation statements)
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“…However, our meta-analysis [35] shows that the relation of the non-photochemical quenching to PRI can be strongly varied under sunlight, however using artificial illumination increases correlations between the parameters. Additionally, our previous results demonstrate that light-induced changes in PRI (∆PRI) are more sensitive to the nonphotochemical quenching than absolute value of PRI [36,41,45]. The results show that measuring PRI with using artificial illumination under different light conditions, which is necessary for ∆PRI estimation, is an important problem for remote and proximal plant photosynthetic sensing.…”
Section: Discussionmentioning
confidence: 88%
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“…However, our meta-analysis [35] shows that the relation of the non-photochemical quenching to PRI can be strongly varied under sunlight, however using artificial illumination increases correlations between the parameters. Additionally, our previous results demonstrate that light-induced changes in PRI (∆PRI) are more sensitive to the nonphotochemical quenching than absolute value of PRI [36,41,45]. The results show that measuring PRI with using artificial illumination under different light conditions, which is necessary for ∆PRI estimation, is an important problem for remote and proximal plant photosynthetic sensing.…”
Section: Discussionmentioning
confidence: 88%
“…Our previously developed modality of PRI measurements [36,41] was based on 30 s GYL pulses which could influence PRI because the fast component of changes in the photochemical reflectance indices is formed within a few seconds or less [38]. In contrast, the newly reported system can generate both short-term GYL pulses (18 ms), which are significantly shorter than the durations of all potential mechanisms of the PRI changes [34,36,38], and pulses with controlled durations, which induce fast changes in PRI. The property increases the efficiency of proximal imaging of photosynthetic processes in plants with the use of the developed system (e.g., the fast component of PRI changes can be measured or excluded from measurements).…”
Section: Discussionmentioning
confidence: 99%
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“…It is known that photosynthetic processes are strongly related to plant optical properties, including fast changes in leaf reflectance (e.g., reflectance in the green spectral range [66,68,[75][76][77][78][88][89][90], which is caused by acidification of the lumen of chloroplasts). Thus, it seems highly probable that VP-induced photosynthetic changes should be accompanied by changes in leaf reflectance, which can potentially be used for their remote sensing.…”
Section: Discussionmentioning
confidence: 99%