以4种四倍体泡桐B4,Y4,N4和M4及其对应二倍体泡桐B2,Y2,N2和M2为材料,分析其叶片显微结构的差异,测定了部分差异指标,并根据这些差异进行四倍体泡桐的抗逆性评价.结果表明:4种四倍体泡桐叶片厚度、上下表皮厚度、栅栏组织厚度、细胞结构紧密度、栅栏组织厚度与海绵组织厚度的比值均大于其二倍体,海绵组织厚度和细胞结构疏松度则相反;筛选出下表皮厚度、栅栏组织厚度和海绵组织厚度3项指标,经隶属函数法分析得出4种四倍体泡桐的抗旱性与抗寒性均大于其二倍体,强弱排序为M4 ＞Y4＞N4＞B4＞M2＞Y2＞N2＞B2.%Microstructure characters of the leaves of tetraploid and diploid Paulownia (B4, Y4, N4 and M4 ; B2, Y2, N2 and M2) were observed and measured using scanning electron microscope, and the stress tolerance of tetraploid and diploid Paulownia were evaluated according to microstructure characters. The results showed that thickness of upper and lower epidermis, palisade tissue and leaf of tetraploid plants were larger than those of the diploid; cell tense ratio and ratio of palisade tissue thickness to sponge tissue thickness were also larger than those of the diploid; but spongy ratio and thickness of spongy were the opposite case. Three indexes (thickness of lower epidermis, spongy and palisade tissue ) were selected to evaluate stress tolerance of Paulownia by using the subordinate function value a-nalysis. The order of stress tolerance was M4 > Y4 > N4 > B4 > M2 > Y2 > N2 > B2.
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