中国兰花的根主要由三部分组成:最外一层是薄薄的表皮;表皮包裹着如海绵般的肉质组织——皮层,吴应祥教授称它“由薄壁细胞和厚壁细胞组成,薄壁细胞是输导组织,运输水份和养料”;中间部分是一条较坚韧的纤维梗(图1)。无论是下山兰或翻盆重栽的兰苗,都可能出现兰 The roots of Chinese orchids are mainly composed of three parts: the outermost layer is a thin epidermis; the epidermis is wrapped in a sponge-like succulent tissue-cortex, which Professor Wu Yingxiang calls “thin-walled cells and thick-walled cells The cells are the guiding tissue that transports water and nutrients ”; the middle part is a tougher fiber stem (Figure 1). Whether it is down or blue potted plants, it may appear blue