Ionomic Study on Populus Cathayana Males and Females Responding to Phosphorus Deficiency
To explore the sex-specific responses to nutrient deficiency between Populus cathayana males and females,an ionomic method was used to investigate the element changes in leaves and roots under a 60-days phosphorus deficiency.Ten elements (Ca,Cu,Fe,K,Mg,Mn,Na,P and Zn) were determined by inductively coupled plasma emission spectrometry (ICP-OES),and analyzed using multivariate analysis and principal component analysis (PCA).P-deficiency significantly decreased the contents of P and Cu in the leaves in P.cathayana males,while increased the contents of Ca,Zn and Cu in females.P content decreased significantly in the roots in both sexes.P deficiency led to a significant decrease of Ca content in male roots,and an increase of S content in female roots.Compared to male plants,female plants had a higher K,Zn content in the roots under both control and P-deficient conditions.The PCA results showed that the first two principal components could explain 50.6％ and 15.6％ of the total variables,respectively.The results of elemental correlation analysis showed that the competition among the same valence elements in poplars was significant,but the competition among the main elements was not significant.These results suggest that P deficiency results in a significant influence on poplar ionome,and cause greater negative effects on females than on males.
NETL
NSTL
万方数据
维普
