Related Experiment Videos
[Relationship between wheat root activity and leaf senescence].
Daozhi Wei1, Shuju Ning, Wenxiong Lin
1School of Life Sciences, Fujian Agriculture and Forest University, Fuzhou 350002, China. weidz@mail.china.com
Ying Yong Sheng Tai Xue Bao = the Journal of Applied Ecology
|January 27, 2005
Summary
Wheat root activity declines before leaf chlorophyll and photosynthesis. Nitrogen fertilizer applied during elongation improves root activity, delaying leaf senescence.
Area of Science:
- Agronomy
- Plant Physiology
Context:
- Wheat yield is significantly impacted by leaf senescence.
- Root activity is a critical factor influencing plant health and yield.
Purpose:
- To investigate the relationship between wheat root activity, leaf chlorophyll content, and photosynthetic rate.
- To determine the effect of nitrogen fertilizer application on these parameters and flag leaf senescence.
Summary:
- Root activity decline precedes flag leaf chlorophyll and photosynthetic rate decline in wheat.
- A strong positive correlation (r = 0.8006) exists between root activity and leaf photosynthetic rate.
- Topdressing nitrogen fertilizer during the elongation stage enhances root activity and photosynthetic rate, reduces abscisic acid (ABA) content, increases zeatin ribosides (ZRs) and superoxide dismutase (SOD) activity, and delays peak malondialdehyde (MDA) levels.
Impact:
- Findings suggest that root activity is closely linked to flag leaf senescence.
- Improving root nutrition and activity early in wheat's growth stages can effectively delay leaf senescence, potentially boosting crop yield.