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Flag leaf vein traits in winter wheat varieties (lines) and their correlation with stomatal traits.

CHEN Wei-yue1,2, LIU Cun-hai3, LI Yang-yang2,3**-, MIN Dong-hong4   

  1. (1College of Forestry, Northwest A&F University, Yangling 712100, Shaanxi, China; 2 Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, Shaanxi, China; 3 State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, Shaanxi, China; 4 College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, China)
  • Online:2014-07-10 Published:2014-07-10

Abstract: Leaf venation decides water transport capacity, while stomatal traits are closely related with water loss. How leaf venation is coordinated with stomatal traits is fundamental to probe the relationship between physiological functions related with water use and their adjustment. Taking winter wheat as an example, we studied leaf vein traits and their relationship with stomatal traits of 15 winter wheat varieties (lines). Density of small longitudinal veins accounted for 65.8% of total leaf vein density. Distance between small longitudinal veins was significantly and positively related with distance between large longitudinal veins and distance between transverse veins. Density of large longitudinal veins and small longitudinal veins were negatively correlated with their distance. Stomatal size on both surfaces was similar, but leaf adaxial surface had a higher stomatal density. Stomatal length, width and density on the adaxial surface were positively related with those on the abaxial surface, a tradeoff relation was found between stomatal length and density for both surfaces. Small longitudinal veins and transverse veins were closely related with stomatal traits, but it was not so for large longitudinal veins. Leaf vein density was positively related with stomatal density on the abaxial surface and total stomatal density, but negatively related with stomatal length on the adaxial surface. These results demonstrated the structural basis of the coordination between leaf water supply and demand in different wheat varieties (lines).

Key words: symbiotic coral, heterotrophic nutrition, molecular nutrition markers