A pot experiment and paraffin sections were used to determine the development and micro-structures of ear vascular bundle system of two wheat (Triticum aestivum L.) genotypes at the late growth stage under water deficit.The relationships between ear vascular micro-structures and carbon assimilate stagnation were also analyzed.The study shows a fan-shaped distribution of the newly formed vascular bundles near the rachis of "Pubing143" and "Xinong979" during anthesis.Away from the rachis is ellipse or other f...
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