Author：Su-Chen Lin ^1,*

¹ Associate Research Fellow, Agricultural Chemistry Division, Taiwan Agricultural Research Institute, Taichung, Taiwan, ROC.

Abstract：

    It is a quite common in our natural environment a harmonic and symbiotic relationship exists between plant roots and arbuscular mycorrhizal fungi (AMF). AMF could promote nutrient absorption, enhance resistance to the soil-borne pests, increase drought-resistance, augment the tolerance of heavy metals, and improve the agglomerate structures in soil. In this presentation, we compiled the diversity between plant species and AMF species as well as the influence of soil phosphorus contents to both AMF promotion effects and the crop growth. Factors will be addressed to obtain the best performance between crops and AMF. From the previous studies, the dependence of AMF of cultivated varieties is much lower than wild ones. AMF dependence of terrestrial and wild cultivars is higher than those with high crop yield phenotypes. Modern cultivated cultivars have lower dependence than their original ones. Crop growth promotion effects of AMF species showed different interactions between fungal strains and crop varieties. AMF could exhibit better crop growth promotion effect in the low P growth medium than in high P. Most newly selected cultivars in the modern breeding system show lower dependence to the AMF and could not fully take advantage of AMF. In the future, if new cultivars could be selected under environmental stress and poor fertilization soils, they may have better mutual cooperation with AMF, and achieve the maximal performance in the crop yield.

Key words：Arbuscular mycorrhizal fungi, Crop variety, Crop cultivar, Phosphate.

* Correspondence address, e-mail: linmay@tari.gov.tw

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