We took the iron-efficient and iron-inefficient soybean varieties with significant differences in iron efficiency as the test materials,in order to ascertain the relationship between the low iron stress and the iron e...We took the iron-efficient and iron-inefficient soybean varieties with significant differences in iron efficiency as the test materials,in order to ascertain the relationship between the low iron stress and the iron efficiency of soybean varieties.The results showed that through the principal component analysis,it was found that the contribution rate of the shoot light energy absorption factor and root morphological factor was the highest,reaching 41.0% and 67.2%,respectively.According to the eigenvector with high absolute value for the two factors,it was found that improving photosynthesis and root surface area could help to improve the ability of soybean to resist low iron.From the dynamic simulation results of Logistic equation,both V and Vmof the shoot and root of iron-efficient varieties were higher than those of iron-inefficient varieties;the low iron treatment postponed the time of the root of iron-inefficient varieties to reach Vm,while the iron-efficient varieties were resistant to the damage caused by the low iron to growth by improving root V.However,when the iron concentration was 0 mM,regardless of iron-efficient varieties or iron-inefficient varieties,the shoot V,Vmand △t were all low,indicating that the division of different iron efficiency varieties was relative,not absolute,and the ability of plant to resist stress was not only determined by its own characteristics,but also closely related to the degree of stress.展开更多
Crops are often subjected to iron(Fe)-deficiency due to the limited solubility of this essential element in most neutral or basic soils. Developing cultivars with high efficiency in Fe utilization via breeding program...Crops are often subjected to iron(Fe)-deficiency due to the limited solubility of this essential element in most neutral or basic soils. Developing cultivars with high efficiency in Fe utilization via breeding programs can provide solutions to this problem as a long term strategy. In the present study, to select inbred lines for breeding of maize with high efficiency in Fe utilization, we screened 123 inbred lines at the seedling stage by analyzing secretion pattern of phytosiderophores, a class of non-protein amino acids released by graminaceous species for Fe utilization, using high-performance liquid chromatography. One hundred and twenty three inbred lines were clustered into nine groups. The low PS secretion rate under Fe-sufficient condition and high PS secretion rate increment after Fe-deficiency treatment type were the ideal inbred lines for breeding of maize with high efficiency in Fe utilization.展开更多
基金Supported by National Natural Science Foundation(31271647,31601245)Jilin Natural Science Foundation(20150101100JC)+1 种基金Key Scientific Achievement Conversion Project of Jilin Provincial Department of Science and Technology(20150307026NY)Key National Research and Development Program(2017YFD0201804-9)
文摘We took the iron-efficient and iron-inefficient soybean varieties with significant differences in iron efficiency as the test materials,in order to ascertain the relationship between the low iron stress and the iron efficiency of soybean varieties.The results showed that through the principal component analysis,it was found that the contribution rate of the shoot light energy absorption factor and root morphological factor was the highest,reaching 41.0% and 67.2%,respectively.According to the eigenvector with high absolute value for the two factors,it was found that improving photosynthesis and root surface area could help to improve the ability of soybean to resist low iron.From the dynamic simulation results of Logistic equation,both V and Vmof the shoot and root of iron-efficient varieties were higher than those of iron-inefficient varieties;the low iron treatment postponed the time of the root of iron-inefficient varieties to reach Vm,while the iron-efficient varieties were resistant to the damage caused by the low iron to growth by improving root V.However,when the iron concentration was 0 mM,regardless of iron-efficient varieties or iron-inefficient varieties,the shoot V,Vmand △t were all low,indicating that the division of different iron efficiency varieties was relative,not absolute,and the ability of plant to resist stress was not only determined by its own characteristics,but also closely related to the degree of stress.
文摘Crops are often subjected to iron(Fe)-deficiency due to the limited solubility of this essential element in most neutral or basic soils. Developing cultivars with high efficiency in Fe utilization via breeding programs can provide solutions to this problem as a long term strategy. In the present study, to select inbred lines for breeding of maize with high efficiency in Fe utilization, we screened 123 inbred lines at the seedling stage by analyzing secretion pattern of phytosiderophores, a class of non-protein amino acids released by graminaceous species for Fe utilization, using high-performance liquid chromatography. One hundred and twenty three inbred lines were clustered into nine groups. The low PS secretion rate under Fe-sufficient condition and high PS secretion rate increment after Fe-deficiency treatment type were the ideal inbred lines for breeding of maize with high efficiency in Fe utilization.
