T1 seeds were screened by germination on filter paper that wetted with 120 mM NaCl. The healthy seedlings, which had root elongation and first leaf development in 10 days, were planted into 15 cm pots containing quartzose sands (0.2–0.6 mm in diameter, had been washed thoroughly with 0.25 M HCl and then rinsed with tap water until reaching neutral pH) in a greenhouse with temperature at 20–28◦C.