Effects of potassium deficiency on photosynthesis, chloroplast ultrastructure, ROS, and antioxidant activities in maize (Zea mays L.)
文献类型：期刊论文
| 作者 | Du Qi; Zhao Xinhua; Xia Le; Jiang Chunji; Wang Xiaoguang; Han Yi; Wang Jing; Yu Haiqiu |
| 刊名 | JOURNAL OF INTEGRATIVE AGRICULTURE
 |
| 出版日期 | 2019 |
| 卷号 | 18期号:2页码:395-406 |
| 关键词 | ARABIDOPSIS ROOT RESPONSE CHLOROPHYLL FLUORESCENCE LIPID-PEROXIDATION HYDROGEN-PEROXIDE OXIDATIVE STRESS SALT-TOLERANT ORYZA-SATIVA COTTON LEAVES CULTIVARS potassium deficiency maize photosynthesis chloroplast ultrastructure ROS and antioxidant |
| ISSN号 | 2095-3119 |
| 英文摘要 | Potassium (K) deficiency significantly decreases photosynthesis due to leaf chlorosis induced by accumulation of reactive oxygen species (ROS). But, the physiological mechanism for adjusting antioxidative defense system to protect leaf function in maize (Zea mays L.) is unknown. In the present study, four maize inbred lines (K-tolerant, 90-21-3 and 099; K-sensitive, D937 and 835) were used to analyze leaf photosynthesis, anatomical structure, chloroplast ultrastructure, ROS, and antioxidant activities. The results showed that the chlorophyll content, net photosynthetic rate (P-n), stomatal conductance (G(s)), photochemical quenching (q(p)), and electron transport rate of PSII (ETR) in 90-21-3 and 099 were higher than those in D937 and 835 under K deficiency treatment. Parameters of leaf anatomical structure in D937 that were significantly changed under K deficiency treatment include smaller thickness of leaf, lower epidermis cells, and vascular bundle area, whereas the vascular bundle area, xylem vessel number, and area in 90-21-3 were significantly larger or higher. D937 also had seriously damaged chloroplasts and PSII reaction centers along with increased superoxide anion (O-2(-center dot)) and hydrogen peroxide (H2O2). Activities of antioxidants, like superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX), were significantly stimulated in 90-21-3 resulting in lower levels of O-2(-center dot) and H2O2. These results indicated that the K-tolerant maize promoted antioxidant enzyme activities to maintain ROS homeostasis and suffered less oxidative damage on the photosynthetic apparatus, thereby maintaining regular photosynthesis under K deficiency stress. |
| 资助项目 | [National Natural Science Foundation of China] ; [National Key Technology R&D Program of China] |
| 语种 | 英语 |
| CSCD记录号 | CSCD:6429133 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/156086]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 作者单位 | 中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Du Qi,Zhao Xinhua,Xia Le,et al. Effects of potassium deficiency on photosynthesis, chloroplast ultrastructure, ROS, and antioxidant activities in maize (Zea mays L.)[J]. JOURNAL OF INTEGRATIVE AGRICULTURE,2019,18(2):395-406. |
| APA | Du Qi.,Zhao Xinhua.,Xia Le.,Jiang Chunji.,Wang Xiaoguang.,...&Yu Haiqiu.(2019).Effects of potassium deficiency on photosynthesis, chloroplast ultrastructure, ROS, and antioxidant activities in maize (Zea mays L.).JOURNAL OF INTEGRATIVE AGRICULTURE,18(2),395-406. |
| MLA | Du Qi,et al."Effects of potassium deficiency on photosynthesis, chloroplast ultrastructure, ROS, and antioxidant activities in maize (Zea mays L.)".JOURNAL OF INTEGRATIVE AGRICULTURE 18.2(2019):395-406. |
入库方式： OAI收割
来源：金属研究所
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