Increasing in ROS levels and callose deposition in peduncle vascular bundles of wheat (Triticum aestivum L.) grown under nitrogen deficiency

文献类型： 外文期刊

第一作者： Kong, Lingan

作者： Kong, Lingan;Wang, Fahong;Si, Jisheng;Feng, Bo;Zhang, Bin;Li, Shengdong;Wang, Zheng;Wang, Fahong

作者机构：

关键词： antioxidant enzymes;callose deposition;nitrogen deficiency;reactive oxygen species;vascular bundles;Triticum aestivum L

期刊名称：JOURNAL OF PLANT INTERACTIONS （ 影响因子：4.208； 五年影响因子：4.344 ）

ISSN： 1742-9145

年卷期： 2013 年 8 卷 2 期

页码：

收录情况： SCI

摘要： Nitrogen availability is closely related to crop senescence and productivity, but its associated effect on reserve remobilization is not yet fully understood. In this study, we observed that nitrogen deficiency (N) led to significant decreases in the activities of superoxide dismutase (SOD) (P<0.05), guaiacol peroxidase (P<0.05), and catalase (P<0.05) as well as a higher concentration of reactive oxygen species (ROS) (P<0.05) in wheat (Triticum aestivum L.) peduncles during the middle grain-filling compared with the application of 225 kg N ha(1) (N+). Callose concentration showed the same trend of temporal changes as ROS. Histochemical staining revealed that both ROS and callose predominantly occurred in vascular bundles of peduncles. Ultimately, grain filling rates and grain weight in N wheat were reduced compared with N+ plant. These data suggest that the grain yield decline in N wheat may be at least partially attributed to the higher callose deposition in peduncle vascular bundles and ROS level is closely associated with the increase in the callose deposition in wheat peduncle vascular bundles.

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