Figure 4
AtSWEET4 mediates stress responses.
(A) Overexpression of AtSWEET4 protects plant cells from being damaged under freezing treatment. Leaves were collected from three types of plants and measured for relative electrolyte leakage; each experiment was carried out with three replicates. Data represent the mean ± SE (n = 3). *p value < 0.05, t-test. (B) Reduction in AtSWEET4 expression leads to sensitivity to drought treatment, the 4-week-old plants of Col-0, RNAi4-8 and OE4-4 grown in soil were withheld water for 23 days when pictures were taken. (C) Expression level of AtSWEET4 was induced by infection of nonhost bacterium Pseudomonas syringae pv. phaseolicola NPS3121. Data represent the mean ± SE (n = 3). **p value < 0.01, t-test. (D) Growth of nonhost bacterium Psph NPS3121 strain in the leaves of 5-week-old plants after infiltration with the inoculum. The experiments were carried out in duplicate, each with four plants, data represent the mean ± SE. *p value < 0.05, **p value < 0.01, t-test.
