The effects of salinity on germination and early growth of Puccinellia nuttalliana

Abstract

Seed germination studies indicate that Puccinellia nuttalliana can germinate in media with a water potential to −16 bars, with a sharp decrease in germination at −12 bars. Recovery from −42 bars is generally equal to that of control tests, indicating high salinities do not permanently inhibit germination. Seedlings are stimulated at −4 bars, but growth shows a sharp decrease between −8 bars and −16 bars. Growth and flowering are promoted by long days. P. nuttalliana is not an obligate halophyte, but is tolerant of salinities which most nonhalophytes cannot endure.