The response of marigold (Tagetes erecta Linn.) to ozone: impacts on plant growth and leaf physiology

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	The response of marigold (Tagetes erecta Linn.) to ozone: impacts on plant growth and leaf physiology
	Chen, Yuanyuan; Yang, Ning; Wang, Xiaoke; Zheng, Feixiang
刊名	ECOTOXICOLOGY
	2017
卷号	26 期号:1 页码:151-164
关键词	Ascorbic Acid Biomass Jasmonic Acid Marigold Ozone Stomatal Aperture
英文摘要	Progressively increasing ozone (O-3) concentrations pose a potential threat to the value of marigold (Tagetes erecta Linn.), a plant widely used in urban landscaping. The response of marigold to elevated O-3 has been reported earlier, but the mechanisms underlying the O-3 effect have not been clearly elucidated. In the present study, we exposed marigold "Moonsong Deep Orange" plants to elevated O-3, including ambient non-filtered air (NF) plus 60 ppb (NF+60) and 120 ppb (NF+120) O-3, to assess visible injury and the possible physiological consequences of this pollutant. Yellow lesions appeared after 4 days under NF+120 treatment and 12 days under NF+60 treatment, with 85.6% and 36.8% of the leaves being injured at harvest time, respectively. Compared with NF, NF+60 inhibited leaf photosynthesis, stem-diameter growth, and biomass production significantly, while the parameters were decreased more by NF+120. Although the stomatal conductance decreased under elevated O-3 exposure, the O-3 flux into leaves increased by 28.0-104.8% under NF+60 treatment and 57.5-145.6% under NF+120 treatment. The total ascorbic acid (ASA) content increased due to elevated O-3 exposure, while the reduced ASA content did not, resulting in a decreased ratio of reduced to total ASA. A lower level of jasmonic acid (JA) was observed under elevated O-3 exposure. In conclusion, the impacts of elevated O-3 on marigold plants may be ascribed to increased O-3 flux into leaves and reduced protective capacity of leaves to convert oxidized to reduced ASA and synthesize endogenous JA.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/39131]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Chen, Yuanyuan,Yang, Ning,Wang, Xiaoke,et al. The response of marigold (Tagetes erecta Linn.) to ozone: impacts on plant growth and leaf physiology[J]. ECOTOXICOLOGY,2017,26(1):151-164.
APA	Chen, Yuanyuan,Yang, Ning,Wang, Xiaoke,&Zheng, Feixiang.(2017).The response of marigold (Tagetes erecta Linn.) to ozone: impacts on plant growth and leaf physiology.ECOTOXICOLOGY,26(1),151-164.
MLA	Chen, Yuanyuan,et al."The response of marigold (Tagetes erecta Linn.) to ozone: impacts on plant growth and leaf physiology".ECOTOXICOLOGY 26.1(2017):151-164.