JIA-2018-09

1942 HAN Jiao et al. Journal of Integrative Agriculture 2018, 17(9): 1932–1945 enhanced increase in the expression of the McPht gene under phosphate deficiency, indicating that phosphate deficiency seems to induce the expression of the McPht gene. Wen et al . (2014) reported that phosphorus deficiency increased the expression level of the OsPT6 gene, and the transgenic vegetable soybean overexpressing the OsPT6 gene had higher root weights than the wild type under low- phosphate stress. Previous reports showed that phosphate transporters were preferentially expressed in the roots under phosphorus deficiency (Daram et al . 1998; Liu et al . 1998). Study showed that both the low affinity phosphate system and the high affinity phosphate system are two essential pathways for the uptake and transport of phosphate in plants, and thus leading to an increase in biomass (Furihata et al . 1992). The high-affinity systems are induced by low-phosphorus conditions (Furihata et al . 1992), while Fig. 8 Histogram of the most enriched gene ontology (GO) terms and differentially expressed genes (DEGs) number. A, the DEGs enrichment GO terms. Different colors represent biological process (BP), cellular component (CC), and molecular function (MF). * means significant enrichment GO term. B, statistics of up-regulation or down-regulation DEGs of enriched GO term. Fig. 9 Statistics of the up- or down-regulation of differentially expressed genes (DEGs) enriched pathway term.