不同菌根类型植物叶片灰分含量及其对气候变化响应的差异

Discrepancies of Leaf Ash Concentration in Arbuscular and Etco-mycorrhizal Different Plants Associated Arbuscular and Etco-mycorrhizas and Their Response to Climate Change

丛枝菌根和外生菌根是菌根的2个主要类型,在生态系统中,两种类型的菌根都扮演着重要的角色,但众多研究表明,这两种类型菌根的生态功能有所差异。文章针对中国陆地植物叶片灰分含量,探究了丛枝菌根和外生菌根植物叶片灰分含量的差异,并研究了植物叶片灰分含量对气候变化响应随两种菌根类型不同而变化的情况。结果表明,中国陆地植物叶片灰分含量因丛枝菌根和外生菌根的不同而存在明显的差异,丛枝菌根植物叶片灰分含量为127.9 mg·g^−1,显著高于外生菌根植物叶片(55.2 mg·g^−1)。随着两种菌根类型的不同,植物叶片灰分含量对气候变化的响应也存在显著的不同,丛枝菌根植物叶片灰分含量受到纬度和温度变化的显著影响,而外生菌根植物则未受到二者的影响。丛枝菌根植物叶片灰分含量随气温的变化,呈现出明显的二次函数的变化规律(P<0.01);丛枝菌根类型叶片灰分含量随纬度的增加,也呈现显著增加的趋势。两种菌根类型植物叶片灰分含量随降水量和土壤pH的变化而变化,虽然呈现出相同的变化趋势,但其变化速率却不同;丛枝菌根植物叶片灰分含量更易受到降水的影响,其敏感程度是外生菌根的1.61倍;对于土壤pH变化的影响,外生菌根植物的反应则更为敏感。可见,丛枝菌根和外生菌根植物叶片灰分含量存在着显著的差异,二者对气候变化的响应也存在明显的不同。

Arbuscular and ecto-mycorrhizal plantss are the two main types of mycorrhizas in terrestrial ecosystem,which play important roles in terrestrial ecosystems.However,many studies have shown that the ecological functions of arbuscular and ecto-mycorrhizas are different regulating the traits of their hostin regulating host characteristics.In this study,leaf ash concentrations were compared between arbuscular and ecto-mycorrhizal plants based on 1097 terrestrial plants in China with 1097 data.Further,tThe responses of leaf ash concentration between the two kinds of mycorrhizal plants to climate change were also explored.The results showed that the ash concentration of terrestrial plants in China was significantly different between arbuscular and ecto-mycorrhizal plants.The leaf ash concentration of arbuscular mycorrhizal plants was 127.9 mg·g−1,which was significantly higher than that of ecto-mycorrhizal plant leaves with the mean of 55.2 mg·g−1.The responses of leaf ash concentration to climate changes between two kinds of mycorrhizal plants were also significantly different.Leaf ash concentration in arbuscular mycorrhizal plants was significant to be controlled by latitude and temperature factors,while ecto-mycorrhizal plants were not.The leaf ash concentration of arbuscular mycorrhizal plants was enhanced with the increase of mean annual temperature and latitude according to quadratic and linear functions,respectively.When the mean annual mean annual precipitation were was considered,although leaf ash concentration between two kinds of mycorrhizal plants showed the same trend with their changes,the variation degrees magnitude wasere different significantly although leaf ash concentration showed the same trend with their changes.The response of arbuscular mycorrhizal plants was more susceptible to mean annual precipitation plants with the 1.61 times’response amplitude compared to ecto-mycorrhizal plants.Ecto-mycorrhizal plants areis more sensitive to changes in soil pH than arbuscular mycorrhizal plants.It can beWe concludeded that leaf ash concentration between arbuscular and ecto-mycorrhizal plants are significant differences,and their responses to climate changes are also varied based on the two kinds mycorrhizal types.