Microstructure of Rachilla Vascular Bundles at Different Positions of the Summer Maize Ear and Its Influence on the Dry Weight of Grain
The experiment adopted the field trials,set different planting density,and chose different types of maize varieties to study the microstructure of rachilla vascular bundles at different positions of the summer maize ear and its relationship with the dry weight of grain.The results showed that,normally,the phloem of rachilla vascular bundle was developed,and the "horn" structure was conducive to the grain-filling,and the rachilla vascular bundle of abortive grain was stunted.The rachilla vascular bundle area of ZD958 significantly greater than the ND 108';Both varieties of rachilla vascular bundle area decreased with increasing density;The area of rachilla vascular bundle was greatly influenced by the density,but had been affected more by gene(varieties).The structure of rachilla vascular bundle under the higher density was still normal,although the area was to reduce but not enough to be an obstacle to the grouting.This was one of the reasons for its high-yield.Therefore,in variety breeding,we should prefer the materials with larger rachilla vascular bundle.
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万方数据
维普
