We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
不同干旱胁迫程度对不同品种玉米关键生育期 抗氧化特性的影响.
- Authors
崔蓉; 柳鑫婧; 李锦秀; 王呈玉; 张欣宇; 常洪艳; 刘淑霞
- Abstract
: [ Objectives J The purpose of this study was to clarify the physiological response of maize under different drought stress levels by measuring the antioxidant enzyme activities, proline (Pro) and malondialdehyde ( MDA) contents of different maize varieties under different drought stress levels at key growth stages, and to provide a theoretical basis for drought resistance and stable yield of maize. [ Methods] Three maize varieties with different ffrought tolerance, ' Jinqing 707 ' ' Nendan 19 ' and ' Fudan 16 ', were used as experimental materials. Five water gradients of normal water supply (CK), light drought (LS), medium drought (MS), severe drought (SS) and continuous drought ( S) treatments were set at jointing stage, tasseling stage and filling stage of maize. [ Results J With the increasing of drought stress, superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) activities in maize leaves showed a trend of first increasing and then decreasing. At the same time, it reached the peak in moderate drought [ ( 45 ± 5) % of field water capacity J . The growth rate of maize was faster at heading stage, and the activities of three antioxidant enzymes were also the highest under drought stress. Among them, three varieties from high to low were' Jinqing 707' 'Nendan 19' and' Fudan 16', respectively. With the increment of drought stress, the Pro content in maize leaves of different varieties increased significantly, and the highest Pro content was 2 101.12 ng • g- 1 at tasseling stage. Compared with the control, the content of Pro increased most significantly under continuous drought. The content of MDA was the highest in the filling stage. When the stress was serious, the content of MDA was significantly higher than that of the control group, hut the stronger the drought tolerance of maize varieties, the lower the content. [ Conclusions J At tasseling stage drought stress affected yield more easily. When the soil moisture maintained more than 50% of field capacity, corn plant can enhance the antioxidant enzyme activity and Pro content. When the soil moisture maintained was less than 50% of field capacity, the corn plant were easily affected by stress.
- Subjects
SUPEROXIDE dismutase; DROUGHT tolerance; SOIL moisture; YIELD stress; WATER supply; CORN; CORN growth
- Publication
Journal of Nanjing Agricultural University / Nanjuing Nongye Daxue Xuebao, 2022, Vol 45, Issue 3, p545
- ISSN
1000-2030
- Publication type
Article
- DOI
10.7685/jnau.202100025