The Effects And Physiological Of Arbuscular Mycorrhizal Fungi On Salt Tolerance Of Jatropha And Safflower

Soil salinization seriously restricted the production of agriculture, affecting the sustainable development of resources and the environment, has become one of the world’s urgent saline land restoration type. Arbuscular mycorrhizal fungi (AMF) plays an important role on plant growth and development, stress resistance and other aspects of the beneficial effects have been confirmed in many studies. Many studies have already focused on the salt resistance of crop. However, whether AMF can enhance the salt-resistant ability of Jatropha curcas Land Carthamus tinctorius. are rarely reported. In our study, we conducted a greenhouse experiment to test the effects of arbuscular mycorrhizal fungi (AMF) on the growth physiological indicators of Jatropha curcas.and Carthamus tinctor ius L. under different salt concentrations. The main results were as follows:Salt stress reduced the colonization of AMF. In our experiment, the colonization rate of jatropha and safflower decreased with increasing salinity.Salt stress inhibits the growth of Jatropha, plant height, stem diameter and fresh weight decreased with increasing salt concentration, the growth index of Jatropha which inoculate AMF decreased less. Under salt stress, the arbuscular mycorrhizal fungi can also promoted the absorption of Na+ in jatropha’s leaf and stem. AMF significantly influenced the phosphorus, AMF can significantly increased the P content of leaves and stems, P content of roots also increased under salt stress. Finally, arbuscular mycorrhizal fungi can improve the content of leaf soluble protein.1. The experiment found that the salt levels and mycorrhizal fungi had significant interaction on soluble sugar content and SOD of the safflowe and hadn otable interaction on chlorophyll content、malondialdehyde (MDA) antioxidant capacity(T-AOC),proline content and soluble sugar content(SS)of the safflower. AMF raised chlorophyll content,antioxidant capacity,SOD activity and osmolyte (proline and SS) of the safflower under salt stress, while significantly reduced the malondialdehyde content,alleviated the damage caused by salt stress.Inoculation can also promoted the content of phosphorus.2. The salt levels and AMF had significant interaction on the root dry weight and root length of "Xinjiang youci ". With increasing concentration of NaCl, the overground dry weight of "Xinjiang youci" safflower decreased, under the 2‰ and 3‰ two concentrations, inoculation significantly promoted the root length of "Xinjiang youci" safflower.Except K content of overground, salt levels and mycorrhizal fungi had significant interaction on"Xinjiang youci" safflowers P,Mg,Na,Ca content of overground.AMF significantly increased K+,Ca2+, Mg2+ content of overground and Na+ content of "Xinjiang youci" safflower.3. Two-factor analysis of variance results indicated that the salt levels and AMF had no interaction on the growth indicators of "Huayou No.2", but inoculation significantly increased underground dry weight of "Huayou No.2".Salinity levels and mycorrhizal fungi fungi had significant interaction on "Huayou No.2"safflower’s all the measured elements of overground.Inoculation significantly reduced the Na+ content in "Huayou No.2" safflower. When the salinity reached 3‰, K+ content was increased significantly, but the AMF did not significantly affected the content of Ca2+, Mg2+ content in "Huayou No.2".4. Inoculated with mycorrhizal fungi can improve salt tolerance of the two kinds of safflower. AMF raised chlorophyll content,antioxidant capacity,SOD activity and osmolyte, alleviated the damage caused by salt stress.AMF had different influence on the growth indicators and Na+content of the two kinds of safflower.