the hphr has more vascular bundles and a much bigger area of single vascular bundle, total vascular bundle, total phloem and total xylem in the first internode than shanyou 63.
结果表明,重穗型组合的大维管束数目、单个维管束面积及维管束总面积、韧皮部总面积均明显高于汕优6 3。重穗型组合的维管束颖花负荷量、总库容负荷量均与汕优6 3相当。