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Research background: This paper studies the impact of a new so-called green factor on the capitalization of petroleum companies, which is becoming highly relevant in view of the signing of the Paris agreements in 2015 and the support for clean energy. Although society, international organizations, and government authorities encourage companies to reduce their environmental impact, one of the main reasons for responsible behavior is still economic efficiency. The oil industry, on the one hand, faces one of the most volatile markets and, on the other hand, has one of the largest environmental impacts of any industry. That requires a detailed study of interconnections between market capitalization and the green factor. Purpose of the article: A comprehensive study of factors affecting the level of capitalization of oil and gas companies in Russia and identification of the most significant among them with a special focus on the green factor. Methods: Econometric analysis of panel data for Russian petroleum companies. The database includes indicators for six major Russian oil companies from 2011 to 2018. The following groups of factors are analyzed to explain the change in the companies’ capitalization: macroeconomic (GDP and inflation in Russia), microeconomic (companies’ revenue, net profit, tax payment, return on assets, return on equity, ratio of borrowed capital to equity), industrial (oil export, refining, production and proven reserves of the companies), and the green factor. Findings & Value added: The selection of factors showed that the size of capitalization has been influenced most significantly by the following: the volume of the company's proven reserves, net profit, tax burden, and the green factor based on the policy of minimizing environmental damage. This result shows that investors consider companies with high environmental performance to be more valuable than companies with similar financial results but lower environmental ratings.

Communications between chloroplasts and other organelles based on the exchange of metabolites, including redox active substances, are recognized as a part of intracellular regulation, chlororespiration, and defense against oxidative stress. Similar communications may operate between spatially distant chloroplasts in large cells where photosynthetic and respiratory activities are distributed unevenly under fluctuating patterned illumination. Microfluorometry of chlorophyll fluorescence in vivo in internodal cells of the alga Chara corallina revealed that a 30-s pulse of localized light induces a transient increase (~25%) in F' fluorescence of remote cell parts exposed to dim background light at a 1.5-mm distance on the downstream side from the illuminated spot in the plane of unilateral cytoplasmic streaming but has no effect on F' at equal distance on the upstream side. An abrupt arrest of cytoplasmic streaming for about 30s by triggering the action potential extended either the ascending or descending fronts of the F' fluorescence response, depending on the exact moment of streaming cessation. The response of F' fluorescence to localized illumination of a distant cell region was absent in dark-adapted internodes, when the localized light was applied within the first minute after switching on continuous background illumination of the whole cell, but it appeared in full after longer exposures to continuous background light. These results and the elimination of the F' response by methyl viologen known to redirect electron transport pathways beyond photosystem I indicate the importance of photosynthetic induction and the stromal redox state for long-distance communications of chloroplasts in vivo.

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