Genotypic Differences in Responses of Wheat (Triticum durum) Roots to Oxytetracycline

文献类型： 外文期刊

第一作者： Li, Zhaojun

作者： Li, Zhaojun;Xie, Xiaoyu;Song, Alin;Qi, Ruihuan;Fan, Fenliang;Liang, Yongchao;Liang, Yongchao;Liang, Yongchao

作者机构：

关键词： Oxytetracycline (OTC);Wheat;Root morphologic characters;Loss of membrane integrity

期刊名称：MOLECULAR ENVIRONMENTAL SOIL SCIENCE AT THE INTERFACES IN THE EARTH'S CRITICAL ZONE

ISSN：

年卷期： 2010 年

页码：

收录情况： SCI

摘要： A pair of oxytetracycline (OTC)-sensitive (cv. Heyou 1) and OTC-tolerant (cv.Yannong 21) wheat (Triticum durum L.) was grown hydroponically to investigate the effects of OTC on morphologic characteristics and loss of membrane integrity of roots. The number, total length, total surface area, and total volume of roots of both tested wheat cultivars were significantly decreased by OTC. The number of roots was more sensitive to OTC than other indicators such as total length, total surface area, and total volume of roots. The inhibitory effect of OTC on root growth was larger in the sensitive cultivar than in the tolerant. The number and the total surface areas of roots were decreased by 89.6% and 75.9% respectively for sensitive cultivar, and only 87.5% and 68.7% respectively for tolerant cultivar. The cell membrane of Yannong 21 roots was more integrative, and was less oxidative damage than Heyou 1 under the stress of OTC. These results suggested that OTC is toxic to wheat, being similar to other organic pollutants such as herbicides. The root number could be taken as the indicator to predict the risk of OTC to plants at the early stage. The risks of OTC to agriculture would be alleviated through planting the OTC-tolerant wheat cultivars in the OTC-contaminated soils.

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