Secondary metabolites responses of plants exposed to ozone: an update

被引:36
作者
Singh, Aditya Abha [1 ]
Ghosh, Annesha [2 ]
Agrawal, Madhoolika [2 ]
Agrawal, Shashi Bhushan [2 ]
机构
[1] Univ Lucknow, Dept Bot, Lucknow 226007, India
[2] Banaras Hindu Univ, Inst Sci, Dept Bot, Lab Air Pollut & Global Climate Change, Varanasi 221005, India
关键词
Allelopathy; Herbivory; Ozone; Phenylpropanoid pathway; ROS detoxification; Secondary metabolites; VOLATILE ORGANIC-COMPOUNDS; ELEVATED CARBON-DIOXIDE; MONOTERPENOID INDOLE ALKALOIDS; SOIL-NITROGEN TRANSFORMATIONS; PHENOLIC-COMPOUNDS; SCOTS PINE; NUTRITIVE QUALITY; CELL-DEATH; ARABIDOPSIS-THALIANA; CATHARANTHUS-ROSEUS;
D O I
10.1007/s11356-023-28634-2
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Tropospheric ozone (O-3) is a secondary pollutant that causes oxidative stress in plants due to the generation of excess reactive oxygen species (ROS). Phenylpropanoid metabolism is induced as a usual response to stress in plants, and induction of key enzyme activities and accumulation of secondary metabolites occur, upon O-3 exposure to provide resistance or tolerance. The phenylpropanoid, isoprenoid, and alkaloid pathways are the major secondary metabolic pathways from which plant defense metabolites emerge. Chronic exposure to O-3 significantly accelerates the direction of carbon flows toward secondary metabolic pathways, resulting in a resource shift in favor of the synthesis of secondary products. Furthermore, since different cellular compartments have different levels of ROS sensitivity and metabolite sets, intracellular compartmentation of secondary antioxidative metabolites may play a role in O-3-induced ROS detoxification. Plants' responses to resource partitioning often result in a trade-off between growth and defense under O-3 stress. These metabolic adjustments help the plants to cope with the stress as well as for achieving new homeostasis. In this review, we discuss secondary metabolic pathways in response to O-3 in plant species including crops, trees, and medicinal plants; and how the presence of this stressor affects their role as ROS scavengers and structural defense. Furthermore, we discussed how O-3 affects key physiological traits in plants, foliar chemistry, and volatile emission, which affects plant-plant competition (allelopathy), and plant-insect interactions, along with an emphasis on soil dynamics, which affect the composition of soil communities via changing root exudation, litter decomposition, and other related processes.
引用
收藏
页码:88281 / 88312
页数:32
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