Drought stress tolerance.
A. 4-week-old soil-grown plants were withheld from water for 7 d. Survival rates were determined 7 d after water resupply. The number of surviving plants in five independent experiments is represented as the percentage (mean±SE) of the number of total plants (approximately 35 plants per genotype and experiment). Mutant values denoted with an asterisk are significantly different from those of their wild type (t test, P<0.01). B. For drought treatment, 4-week-old soil-grown plants were withheld from water for 9 d. Photos were taken 7 d after water resupply. Plants were arranged according to the visual phenotype. Wild-type plants were not able to survive the prolonged drought period, but approximately 60% of nfxl2-1 plants were still turgescent and viable.