Exogenous application of xanthine and uric acid and nucleobase-ascorbate transporter MdNAT7 expression regulate salinity tolerance in apple. - Sun, Tingting; Pei, Tingting; Yang, Lulu; Zhang, Zhijun; Li, Mingjun; Liu, Yuerong; Ma, Fengwang; Liu, Changhai (BMC Plant Biology, 2021)