不同土壤环境下黑果枸杞茎、叶形态结构比较

应用石蜡切片法对不同土壤环境下黑果枸杞的叶片和茎的形态结构进行了比较，以期为黑果枸杞在天津地区引种提供理论依据。对叶片和茎的表皮、栅栏组织、维管束、皮层、韧皮部等指标进行了测量。结果表明：黑果枸杞在天津不同土壤环境下生长状况良好。生长在碱性粘土中的黑果枸杞叶片呈长披针形，茎表皮和维管束最发达；生长在沙壤土中的黑果枸杞叶片也呈长披针形，但角质层最厚，茎的皮层最发达；长在红棕土中的黑果枸杞叶片则呈近长椭圆形且叶片较厚，叶表皮气孔密度最大，表皮最厚，叶肉的栅栏和海绵组织最发达，叶柄维管束最大，茎最粗，韧皮部最发达，髓最大。因此，生长在不同土壤环境下的黑果枸杞植株的茎、叶片的形态结构差异明显。

Comparison of Morphology and Structure of Stem and Leaf of Lycium ruthenicum Murr. under Different Soil Conditions

We compared the morphology and structure of leaf and stem from Lycium ruthenicum Murr. grown in different soil environment for introducing L.ruthenicum in Tianjin using paraffin sectioning. We measured the thick of epidermis, palisade tissue, vascular bundle, cortex and phloem of leaf and stem. The growth of L.ruthenicum in different soil conditions of Tianjin was good. The leaf of L.ruthenicum grown in alkaline clay was long lanceolate, the epidermal and vascular bundle of stem were the best developed; the leaf grown in sandy loam also was long lanceolate, but the cuticula was the thickest, the cortical of stem was the best developed; the leaf grown in red brown was long oval and more thicker, the leaf epidermal stomatal density was biggest, the epidermis was the thickest, the sponge tissue and palisade tissue of mesophyll were the best developed, the vascular bundles of petiole was the biggest, the stem was the thickest, the phloem was the most developed, and the pith was the largest. Therefore, the morphology and structure of stems and leaves of plants grown in different soil conditions were significantly different.