Response of seed sermination and seedling growth of sugar beet to low-temperature by priming with PEG, acetyl salicylic scid and methyl jasmonate

摘要

In a series of experiments, effect of inclusion of plant growth regulators into the PEG priming solution on low temperature seed germination, emergence percentage and seedling growth of sugar beet was investigated. Seeds were primed for 6 days at 25 deg C in darkness in PEG-6000 (250 g kg~(-1)) containing one of the following: 0, 9, 18, 90 or 180 mg l~(-1) acetyl salicylic acid (ASA) or 0.24, 0.72, 1.2 or 2.4 mg l~(-1) methyl jasmonate (MeJA). A non-primed treatment was also included in the experiment. Following priming, seeds were either immediately subjected to germination and emergence tests at 10 deg C or stored at 4°C for one month after which they were subjected to germination test at 10 deg C. Results indicate that priming seeds in 18 mg l~(-1) of ASA or 0.72 mg l~(-1) MeJA incorporated into the PEG solution can be more effective than PEG alone to improve low temperature germination performance of seeds and subsequent seedling growth.