Relationship Between Fe Deficiency Stress and Fe Efficiency of Soybean Cultivars

doi:10.11924/j.issn.1000-6850.casb16020011

Abstract

Abstract: In order to study the relationship between Fe deficiency stress and Fe efficiency of soybean cultivars, Fe-efficient and Fe-inefficient soybean varieties were used in the experiment. The results of principal components analysis showed that the contribution rate of shoot light energy absorption factor and root morphology factor were the highest, which was 41.0% and 67.2%, respectively; according to characteristic vectors with higher absolute value in these two factors, it was indicated that the improvement of photosynthesis and root surface area was helpful to enhance soybean resistance to low iron. In addition, the results of Logistic equation dynamic simulation showed that V and Vm of overground part and root growth of Fe-efficient variety were higher than that of Fe-inefficient variety; the time of arrival in Vm of Fe-inefficient variety was delayed by low iron treatment, while Fe-efficient variety resisted the growth damage caused by low iron stress through the increase of root V. When iron concentration was 0 mmol/L, V, Vm and △t of overground part in both Fe-efficient and Fe-inefficient varieties were lower, which indicated that the partition of varieties with different tolerance to low iron was relative, not absolute, and plant tolerance depended not only on cultivar characteristics, but also on stress level.

Zhao Jing,Qiu Qiang,Zhang Minghao,Sun Xingmiao,Qian Furong,Zhang Wei and Yan Xiaoyan. Relationship Between Fe Deficiency Stress and Fe Efficiency of Soybean Cultivars[J]. Chinese Agricultural Science Bulletin, 2016, 32(30): 49-55.

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