桃叶片组织解剖结构特征与其抗旱性关系的研究

对6个栽培桃品种的叶片组织结构进行解剖观察、比较、描述,并测定了叶片结构参数。结果表明,各品种间叶片厚度、表皮毛密度、上表皮细胞大小、气孔密度、栅栏组织厚度、海绵组织厚度、叶片组织结构紧密度、疏松度、栅栏组织/海绵组织厚度比等指标差异较大。表皮厚度、角质层厚度、气孔长度各品种间无明显差异。其中气孔密度大,栅栏组织较厚,叶片组织紧密度大、疏松度小,栅栏组织/海绵组织厚度比较高,上表皮细胞较小者抗旱性较强。

Relation between leaf tissue parameters and drought resistance of peaches

Tissue parameters of leaves of 6 peach cultivars were observed and analyzed. The results showed that there were significant differences of leaf thickness, epidermis hair density, size of upper epidermis cells, stoma density, stockade tissue thickness, sponge tissue thickness, CTR, SR and ratio of stockade tissue thickness/sponge tissue thickness among the cultivars, and there was not significant difference of epidermis thickness, cutin thickness and stoma length. The cultivars with high stoma density, thick stockade tissue, high CTR, low SR, high ratio of stockade tissue thickness/sponge tissue thickness and small size of upper epidermis cells in leaves had strong ability of drought resistance.