Related Experiment Video
Updated: Jul 16, 2026
11:27
A Flexible Low Cost Hydroponic System for Assessing Plant Responses to Small Molecules in Sterile Conditions
Published on: August 25, 2018
Ascorbic Acid Seed Priming Enhances Yield and Related Responses in Broccoli Under Water Deficit Stress
Vijaya R Mohan1, Lord Abbey1, Andrew M Hammermeister1
1Faculty of Agriculture, Dalhousie University, Bible Hill, NS B2N 5E3, Canada.
Plants (Basel, Switzerland)
|July 15, 2026
Summary
Ascorbic acid (AsA) seed priming improves broccoli growth and yield under drought stress. This low-cost method enhances physiological resilience and fresh yield, offering a strategy for drought mitigation in agriculture.
Area of Science:
- Agricultural Science
- Plant Physiology
- Biochemistry
Background:
- Drought stress severely limits broccoli (Brassica oleracea L.) productivity by negatively impacting growth, photosynthesis, and yield.
- Seed priming with ascorbic acid (AsA) shows potential for improving seedling performance, but its effects on broccoli head development and yield under water deficit are not well-established.
Purpose of the Study:
- To evaluate the impact of ascorbic acid (AsA) seed priming on broccoli growth, physiological traits, biochemical responses, and yield under varying irrigation regimes.
- To determine the optimal AsA concentration for enhancing drought tolerance and yield in broccoli.
Main Methods:
- Greenhouse pot experiment using broccoli seeds subjected to four treatments: non-primed control, water-primed control, 1 mg L-1 AsA, and 10 mg L-1 AsA.
- Plants were grown under two irrigation regimes: 100% and 50% field capacity (FC).
- Assessed growth parameters (plant height, canopy length), physiological traits (net photosynthesis, chlorophyll), biochemical markers (proline, phenolics, flavonoids, H2O2), and total fresh yield.
Main Results:
- AsA priming significantly enhanced plant height, net photosynthesis, and chlorophyll content under both 100% and 50% FC.
- Under drought stress (50% FC), 10 mg L-1 AsA significantly increased chlorophyll a and b, while reducing proline accumulation.
- Total fresh yield per plant increased with AsA concentration, with 10 mg L-1 AsA boosting yield by 70.5% compared to the non-primed control, irrespective of the watering regime.
Conclusions:
- Ascorbic acid seed priming effectively enhances physiological resilience and significantly increases fresh yield in broccoli, even under water-limited conditions.
- AsA priming represents a promising, low-cost strategy for mitigating drought stress effects and improving broccoli productivity.
- The 10 mg L-1 AsA treatment demonstrated the most significant benefits for yield enhancement.
Related Concept Videos
01:57Adaptations that Reduce Water Loss
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
02:41Responses to Drought and Flooding
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
02:02Responses to Salt Stress
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.