外界支持物直径对苦瓜生长和觅食行为的影响

Effect of support diameter on growth and foraging behavior of Momordica charantia.

采用实验生态学的方法研究了外界支持物直径变化对苦瓜植株生长和觅食行为的影响。结果表明 ,支持物直径变化对主茎节间、叶片、叶柄和卷须的发育进程无明显影响。苦瓜植株的攀援生长显著受到支持物直径大小的影响 ,当支持物直径小于 8mm时 ,植株能较好地自主攀援生长。生长于大直径支持物上的植株比生长于小直径支持物上的植株表现出较高的分枝率、较短的主茎、较长的分枝、较大的比茎长和比叶柄长。相关分析表明 ,节间长度和叶柄长度同植株自主攀援程度成显著正相关关系 ,而单叶面积、分枝数量和比叶柄长同植株自主攀援程度成显著负相关关系。作为攀援植物的一种重要资源 。

Using the experimental ecological methods, the effects of different support diameters on growth and foraging behavior of Momordica charantia were investigated. The results showed that the changes of support diameters make unconspicuous effects on the development of internode, blade, petiole and tendril. The scramble of M. charantia is affected markedly by the diameter of support, and the plant scramble positively when the support diameter is less than 8mm. The plants growing on external support with larger diameter have higher branching ratio, shorter stem, longer shoot, longer specific stem length and larger specific petiole length than those growing on the external support with small diameter. Correlation analysis indicate that internode length and petiole length are positively related to the degree of scramble significantly, but single leaf area, number of branches and specific petiole length are negatively related to the degree of scramble significantly. As an important resource to the climbing plants, the characters and conditions of support would affect plant growth and plant behavior significantly.