IMR OpenIR
Effects of potassium deficiency on photosynthesis, chloroplast ultrastructure, ROS, and antioxidant activities in maize (Zea mays L.)
Du Qi; Zhao Xinhua; Xia Le; Jiang Chunji; Wang Xiaoguang; Han Yi; Wang Jing; Yu Haiqiu
2019
Source PublicationJOURNAL OF INTEGRATIVE AGRICULTURE
ISSN2095-3119
Volume18Issue:2Pages:395-406
AbstractPotassium (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.
KeywordARABIDOPSIS 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
Indexed ByCSCD
Language英语
Funding Project[National Natural Science Foundation of China] ; [National Key Technology R&D Program of China]
CSCD IDCSCD:6429133
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/156087
Collection中国科学院金属研究所
Affiliation中国科学院金属研究所
Recommended Citation
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.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Du Qi]'s Articles
[Zhao Xinhua]'s Articles
[Xia Le]'s Articles
Baidu academic
Similar articles in Baidu academic
[Du Qi]'s Articles
[Zhao Xinhua]'s Articles
[Xia Le]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Du Qi]'s Articles
[Zhao Xinhua]'s Articles
[Xia Le]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.