Kior Anastasiia, Yudina Lyubov, Zolin Yuriy, Popova Alyona, Sukhova Ekaterina, Sukhov Vladimir
Department of Biophysics, N.I. Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod 603950, Russia. Emails:
Funct Plant Biol. 2024 Dec;51. doi: 10.1071/FP24254.
Remote sensing of stressor action on plants is an important step of their protection. Measurement of photochemical reflectance index (PRI) can be used to detect action of stressors including salinization; potentially, a small-scale spatial heterogeneity of PRI (within leaf or its part) can be an indicator of this action. The current work was devoted to analysis of sensitivity of the small-scale heterogeneity in PRI and in the reflected light intensity at 530nm (approximately corresponding to the measuring wavelength for PRI) in leaves of pea (Pisum sativum ) plants to action of salinization. Plants were cultivated under controlled conditions of a vegetation room and under open-air conditions. It was shown that both the standard deviation of PRI and coefficient of variation of the reflected light intensity at 530nm were sensitive to action of salinization on plants. Moreover, this variation coefficient was negatively corelated to the potential quantum yield of PSII; i.e. increasing the coefficient could be used to estimate decreasing this yield caused by photodamage of PSII under salinization. Our results show that the small-scale spatial heterogeneity in PRI and the reflected light intensity at 530nm can be used as additional tools of the remote sensing of plant responses under action of salinization.
遥感监测应激源对植物的作用是植物保护的重要一步。光化学反射指数（PRI）的测量可用于检测包括盐渍化在内的应激源的作用；潜在地，PRI的小尺度空间异质性（在叶片或其部分内）可能是这种作用的一个指标。当前的工作致力于分析豌豆（Pisum sativum）植株叶片中PRI以及530nm处反射光强度（大致对应于PRI的测量波长）的小尺度异质性对盐渍化作用的敏感性。植株在植被室的可控条件下以及露天条件下进行培育。结果表明，PRI的标准差和530nm处反射光强度的变异系数对盐渍化对植物的作用均敏感。此外，该变异系数与PSII的潜在量子产率呈负相关；即，该系数的增加可用于估计盐渍化下PSII光损伤导致的该产率的降低。我们的结果表明，PRI和530nm处反射光强度的小尺度空间异质性可作为盐渍化作用下植物反应遥感监测的额外工具。
