人工光环境对南方红豆杉幼树叶片形态、叶绿素及水分特征的影响

为了探索人工方法重塑观赏型南方红豆杉，在福建明溪进行不同人工光环境对其叶片形态、叶绿素及水分特征影响试验进行分析比较。结果表明，南方红豆杉幼树叶片形态、叶绿素及水分特征在不同人工光环境下存在显著可塑性变化。长期遮荫较全光照可以显著性提高叶长、叶宽、叶绿素a、叶绿素b、叶绿素总量和水分饱和亏缺，显著性降低叶厚、比叶重、组织密度、相对含水量、干鲜比、叶绿素a/b；不同光环境对叶型指数无显著性影响。南方红豆杉为适应不同人工光环境，在叶片形态、叶绿素及水分特征都做出适应性调整。人为改变植物生长的光环境可以改变植株形态，是人工重塑观赏型南方红豆杉的一个重要的措施。

The Influence Between Leaf Morphology, Chlorophyll and Water Characteristics of Taxus chinensis var. mairei Saplings to Artificial Light Environment

In order to explore the use of artificial methods to reshape landscape type Taxus chinensis var. mairei. The leaf morphology, chlorophyll and water characteristics of landscape type Taxus chinensis var. mairei under different artificial light environment were studied in Mingxi, Fujian. The author analyzed and compared leaf morphology, chlorophyll and water characteristics. The results showed that: the leaf morphology, chlorophyll and water characteristics were modified plastically in response to different artificial light conditions. The full sunlight condition than the long-term shade condition significantly increased leaf length, leaf width, chlorophyll a, chlorophyll b, total chlorophyll, WSD, significantly reduced leaf thickness, specific leaf weight, TD, RWC, RDF, chlorophyll a/b. These indicated that: Taxus chinensis var. mairei made some necessary changes in morphological aspects in order to accommodate it to the change of light environment. Anthropogenic changes plant growth light environment could change plant morphology, was an important measure of artificial reshaping landscape type Taxus chinensis var. mairei.