平邑甜茶根毛细胞离子流动性对PAHs胁迫的响应

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Abstract Apple stock-Pingyitiancha (Malus hupehensis Rehd) was selected as experimental materials, hydroponic experiments were conducted with or without fluoranthene and benzo (b) fluoranthene. Non-invasive Micro-test Technique was used to detect the effects of Ca²⁺, K⁺, H⁺ fluxes in response to polycyclic aromatic hydrocarbons (PAHs) treatments. Our results showed that: (1) fluoranthene and benzo (b) fluoranthene treatments resulted in the liquidity of Ca²⁺increased from(-63.53±9.30)pmol/(cm²×s) to (+62.85±10.00)pmol/(cm²×s)、(91.33±19.72) pmol/(cm²×s); the liquidity of K⁺ increased from(-60.56±14.56)pmol/(cm²×s) to(+32.60±5.44)pmol/(cm²×s)、(+36.76±5.23)pmol/(cm²×s); the liquidity of H⁺reduced from(+44.38±5.19)pmol/(cm²×s) to(-0.72±0.055)pmol/(cm²×s)、(-6.34±0.79)pmol/(cm²×s). fluoranthene and benzo (b) fluoranthene treatments resulted in the liquidity of Ca²⁺, K⁺, H⁺ in root epidermis obvious reversal. A dramatic Ca²⁺, K⁺ efflux was observed in root epidermis under stress, and gradually reduced to a stable level. Meanwhile, H⁺ showed influx and did not affect the PAHs treatments. (2) Benzo[b]fluoranthene Stress showed more toxic effects on ion mobility in root hair cells than that of fluoranthene. The results indicated that PAHs stress could damage the ion mobility of root hair cells, interfere plants growth and development, providing a theoretical basis for further study on the response of plants to PAHs stress.

Key words： Malus hupehensis Rehd fluoranthene benzo[b]fluoranthene stress the ion mobility

Received: 29 February 2016

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	Articles by authors
	XU Jin
	HUANG Cui-xiang
	LiU Qing
	MAO Yun-fei
	NI Wei
	YU Wen-zhang
	SHEN Xiang

Cite this article:

XU Jin,HUANG Cui-xiang,LiU Qing等. The ion mobility in root hair cells of Malus hupehensis in response to stress from PAHs[J]. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(10): 3107-3111.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2016/V36/I10/3107

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