种源与环境因子对枫香叶色变化的影响

发布时间：2018-03-06 09:38

  本文选题：枫香　切入点：家系　出处：《内蒙古农业大学》2017年硕士论文　论文类型：学位论文

【摘要】：枫香(Liquidambar formosana Hance)为金缕梅科(Hamamelidaceae)枫香属(Liquidambar L)植物。本文尝试对不同种源的枫香在不同环境条件下叶片色素含量变化及其呈色响应开展试验研究,对枫香秋叶着色和环境因子的相关性进行初步探讨,进而分别从温度和光质2个方面研究分析环境因子对枫香秋叶着色的影响,从而为枫香育种和科学管护以及彩叶树的景观培育提供科学依据。主要结果如下:1.4个枫香家系叶片颜色在不同环境下有不同的变化趋势,同一环境下不同枫香家系叶片变化也显著不同。其中17号家系在转色期大部分叶片由绿色变为深红色,而14号家系叶片颜色变化不显著。4个家系叶片中的色素以及可溶性糖含量有显著差异。总之,秋冬季枫香叶色变化是多种因素的综合作用的结果,最直接的原因是色素成分和比例的改变,而糖分、温度、湿度等是叶片呈色重要的内外因子。2.2个枫香家系叶片颜色在低温处理下有相同的变化趋势,同一低温处理下2个枫香家系叶片变化则显著不同。其中17号家系在试验中期即有叶片开始变色,在试验后期,6℃处理组大部分叶片变为红色,而14号家系叶片颜色变化不显著。而与色素合成相关的几个代谢产物含量在2个枫香家系之间也有显著差异。总之,低温可以使枫香叶片叶色发生显著改变,低温胁迫后2个家系色素合成途径可能有所不同,这可能是造成2个家系在低温环境中有不同色彩表现的原因之一。3.2个枫香家系叶片颜色在光质处理下有相同的变化趋势,红光处理可以促进叶绿素合成;蓝光处理可以促进枫香叶片积累更多的花青素。但在整个转色期2个枫香家系叶色均没有显著变化,这可能与试验期间温度不低有关。
[Abstract]:Liquid ambar formosana (Hance) is a plant of Hamamelidaceae. This paper attempts to study the changes of leaf pigment content and its color response in different provenances of Maple (Hamamelidaceae) under different environmental conditions. The correlation between coloring of autumn leaves and environmental factors was preliminarily discussed, and the effects of environmental factors on coloring of autumn leaves were studied from two aspects of temperature and light quality, respectively. The main results are as follows: 1.The leaf color of 4 Maple families has different trends in different environments. In the same environment, the leaf changes of different families were also different, and most of the leaves of family 17 changed from green to dark red in the period of color conversion. However, there was no significant change in leaf color in family 14. There were significant differences in pigment and soluble sugar content in leaves of four families. In short, the color change of Maple leaves in autumn and winter was the result of a combination of many factors. The most direct reason is the change of pigment composition and proportion, while sugar, temperature and humidity are the important internal and external factors of leaf color. 2.2 Maple families have the same change trend in leaf color under low temperature treatment. Under the same low temperature treatment, the leaf changes of the two families were significantly different, among them, the leaves of family 17 began to discolor in the middle period of the experiment, and most of the leaves in the treatment group of 6 鈩，

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