Related Experiment Video
Updated: Jul 8, 2025

Imaging and Analysis for Quantifying Maize (Zea mays) Abiotic Stress Phenotypes
Published on: March 28, 2025
Altered fatty acid composition confers improved drought acclimation in maize.
Lina Yin1, Jili Xu2, Lingzhi Zhang2
1State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China; Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi, 712100, China; Institute of Soil and Water Conservation, Chinese Academy of Sciences & Ministry of Water Resources, Yangling, Shaanxi, 712100, China.
Plant drought acclimation involves membrane lipid remodeling. Specific fatty acids and the double bond index (DBI) are crucial for maize drought tolerance and recovery, aiding in maintaining physiological functions.
Area of Science:
- Plant Physiology
- Biochemistry
- Crop Science
Background:
- Drought significantly impacts plant physiology, often altering membrane lipid composition.
- The role of membrane lipid remodeling in crop drought acclimation, encompassing tolerance and recovery, remains incompletely understood.
Purpose of the Study:
- To investigate the physiological responses and drought acclimation capabilities of 18 maize genotypes under drought and re-watering.
- To analyze changes in membrane lipid and fatty acid composition in response to drought stress and recovery.
- To determine the relationship between membrane lipid alterations and drought tolerance/recovery mechanisms in maize.
Main Methods:
- Imposed natural progressive drought and re-watering on 18 maize genotypes at the seedling stage.
- Assessed physiological parameters including shoot dry weight, relative water content, and Fv/Fm.
- Quantified total lipid content, fatty acid composition, and calculated the double bond index (DBI); employed principal component analysis.
Main Results:
- Drought reduced shoot dry weight, relative water content, Fv/Fm, total lipid content, and DBI in most genotypes.
- Re-watering partially restored these physiological and lipid parameters.
- C18:3 fatty acid was linked to drought tolerance, while C16:2 and C16:3 fatty acids were associated with drought recovery. DBI positively correlated with shoot dry weight and relative water content, and negatively with lipid peroxidation, indicating its importance for both tolerance and recovery.
Conclusions:
- Membrane lipid remodeling, including changes in specific fatty acids and DBI, is vital for drought tolerance and recovery in maize.
- These lipid alterations likely enhance membrane fluidity and reduce damage, preserving photosynthetic capacity under drought.
- Different fatty acid species play distinct roles in crop drought acclimation, highlighting potential targets for breeding improved drought-resistant varieties.
More Related Videos
Related Concept Videos
Adaptations that Reduce Water Loss
Responses to Drought and Flooding
C4 Pathway and CAM
C4 Pathway
The C4 pathway is used by plants such as...
Responses to Heat and Cold Stress

