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DOI	10.1016/j.envpol.2023.123143
	An assessment of ozone risk for date palm suggests that phytotoxic ozone dose nonlinearly affects carbon gain
	Hoshika, Yasutomo; Moura, Barbara Baesso; Cotrozzi, Lorenzo; Nali, Cristina; Alfarraj, Saleh; Rennenberg, Heinz; Paoletti, Elena
通讯作者	Hoshika, Y
来源期刊	ENVIRONMENTAL POLLUTION
ISSN	0269-7491
EISSN	1873-6424
出版年	2024
卷号	342
英文摘要	Tropospheric ozone (O-3) is a significant phytotoxic air pollutant that has a negative impact on plant carbon gain. Although date palm (Phoenix dactylifera L.) is a globally important crop in arid or semi-arid regions, so far O-3 risk assessment for this species has not been reported. This study estimated leaf- and plant-level photosynthetic CO2 uptake for understanding how elevated levels of O-3 affects date palm biomass growth. Ozone risks to date palm plants were assessed based on exposure- (AOT40) or flux-based indices (Phytotoxic Ozone Dose, PODy, where y is a threshold of uptake). For this purpose, plants were exposed to three levels of O-3 [ambient air, AA (45 ppb as daily average); 1.5 x AA; 2.0 x AA] for 92 days in an O-3 Free-Air Controlled Exposure facility. According to the model simulations, the negative effects of O-3 on plant-level net photosynthetic CO2 uptake were attributed to reduced gross photosynthetic carbon gain and increased respiratory carbon loss. Season-long O-3 exposure and elevated temperatures promoted the negative O-3 effect because of a further increase of respiratory carbon loss, which was caused by increased leaf temperature due to stomatal closure. POD1 nonlinearly affected the photosynthetic CO2 uptake, which was closely related to the variation of dry mass increment during the experiment. Although the dose-response relationship suggested that a low O-3 dose (POD1 < 5.2 mmol m(-2)) may even positively affect photosynthetic CO2 uptake in date palms, stomatal O-3 uptake at the current ambient O-3 levels has potentially a negative impact on date palm growth. The results indicate 5.8 mmol m(-2) POD1 or 21.1 ppm h AOT40 as critical levels corresponding to a 4% reduction of net CO2 uptake for date palm, suggesting that this species can be identified as a species moderately sensitive to O-3.
英文关键词	Ozone damage High air temperature Respiration Dose-response Model analysis Physiological adaptation
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001138269800001
WOS关键词	PHOENIX-DACTYLIFERA ; ELEVATED OZONE ; GAS-EXCHANGE ; STOMATAL CONDUCTANCE ; QUERCUS-ILEX ; MODEL ; PHOTOSYNTHESIS ; RESPONSES ; GROWTH ; CO2
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403610
推荐引用方式 GB/T 7714	Hoshika, Yasutomo,Moura, Barbara Baesso,Cotrozzi, Lorenzo,et al. An assessment of ozone risk for date palm suggests that phytotoxic ozone dose nonlinearly affects carbon gain[J],2024,342.
APA	Hoshika, Yasutomo.,Moura, Barbara Baesso.,Cotrozzi, Lorenzo.,Nali, Cristina.,Alfarraj, Saleh.,...&Paoletti, Elena.(2024).An assessment of ozone risk for date palm suggests that phytotoxic ozone dose nonlinearly affects carbon gain.ENVIRONMENTAL POLLUTION,342.
MLA	Hoshika, Yasutomo,et al."An assessment of ozone risk for date palm suggests that phytotoxic ozone dose nonlinearly affects carbon gain".ENVIRONMENTAL POLLUTION 342(2024).