关键词: 全球变暖, 叶片和细根, 氧化损伤, 抗氧化防御, 相互关联, 影响机制

Abstract: The leaves and fine roots are the most sensitive and active parts of the aboveground and belowground parts of plants, and play a very important role in the carbon cycle of the forest ecosystem. The physiological and metabolic characteristics of leaves and fine roots and their interrelated changes not only reflect the growth status of plants under the background of global warming, but also reveal the response characteristics and adaptation strategies of plants to environmental stress. Their changes have become one of the hotspots and difficulties in the field of global change. A large number of experiments has been carried out at home and abroad to investigate the change characteristics and response mechanisms in physiological metabolism and of plant leaves and fine roots under global warming conditions from the perspectives of oxidative damage, antioxidant defense and metabolites. At present, some studies believe that atmospheric warming will promote the accumulation of active oxygen species in leaves and caused oxidative damage to leaves, while the damage to fine roots is not obvious. But some studies also believe that fine roots are more affected by soil warming. In summary, how plant leaves and fine roots will respond to climate warming by adjusting their physiological and metabolic characteristics and the interaction between organs and the internal mechanism of these responses have not been fully studied. So, this study systematically reviewed the research progress on the oxidative damage and antioxidant defense characteristics of plant leaves and fine roots under the background of global warming and their interrelated changes, with a view to providing a reference for the research on the response and adaptation mechanism of plants to global warming, and believed that the following aspects should be carried out in the future: (1) enhanced the study of oxidative damage and defense characteristics of plants by warming at population and community scales; (2) combined above- and below-ground phenological characteristics to study the effect of warming on oxidative damage and defense characteristics of plants; (3) deeply analysis the response of plant oxidative damage and defense characteristics to warming from the correlation between more plant physiological indicators; (4) strengthen the research on the correlation of plants above and below ground and seasonal differences.

Key words: global warming, leaf and fine root, oxidative damage, antioxidant defense, correlation, impact mechanism