Title: Exploring the effects of elevated carbon dioxide mediated global warming phenomenon in photosynthesis: challenges and future directions

Authors: Malini Bhattacharyya; Abhishek Jamloki; Babita Patni

Addresses: Environmental Plant Biology Department, High Altitude Plant Physiology Research Center, HNBGU, Srinagar Garhwal Uttarakhand, India ' Plant Physiology Department, High Altitude Plant Physiology Research Center, HNBGU, Srinagar Garhwal Uttarakhand, India ' Department of Medicinal and Aromatic Plants, High Altitude Plant Physiology Research Center, HNBGU, Srinagar Garhwal Uttarakhand, India

Abstract: Photosynthesis is a plant-physiological mechanism that transforms light energy into chemical energy. It is the only mechanism for food preparation in the form of complex sugar. Rise in the concentration of greenhouse gases (GHGs) and water vapour causes a hike in global temperature known as global warming. Increasing temperature causes climate change by changing the weathering pattern. Climate change affects photosynthesis in C3, C4, and Crassulacean acid metabolism (CAM) plants. The focus of this review is to highlight the impact of elevated CO₂ mediated global warming on photosynthesis. CO₂ is the most abundant greenhouse gas. The elevated CO₂ level in the atmosphere increases the photosynthesis rate in plants until a certain level. Increased heat caused by higher CO₂ concentration disrupts the photosynthetic machineries. Moreover, the increased level of temperature built up by a higher amount of atmospheric CO₂ concentration on the C3, C4, and CAM pathway follower plants are discussed thoroughly.

Keywords: climate change; elevated CO₂ ; global warming; green plants; photosynthesis; Rubisco.

DOI: 10.1504/IJGW.2022.121227

International Journal of Global Warming, 2022 Vol.26 No.3, pp.269 - 293

Received: 18 Aug 2020
Accepted: 16 May 2021
Published online: 01 Mar 2022 *

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