445 / 2019-02-19 15:19:47

1-Methylcyclopropene modulates physiological, biochemical, and spikelets developmental responses of rice to salt stress

rice,physiology,1-methylcyclopropene,ethylene,salt stress,spikelts,Antioxidants,grain yield

全体主题 > Abiotic Stress

Salt stress in soil is the key constraint affecting rice production. Salt stress hinders the plant growth by osmotic stress, ionic stress, and hormonal imbalance (especially ethylene), therefore, thoughtful efforts are needed to devise management strategies for salt tolerance. 1-Methylcyclopropene (1-MCP) is an ethylene action inhibitor, and 1-MCP could greatly reduce the ethylene production in crops and fruits. However, the responses of 1-MCP to physiological, biochemical and antioxidants features of rice under salt stress were not clear. The present study attempted to check if 1-MCP could modulate the salt tolerance for different rice cultivars. Pot culture experiments were conducted in the green house in 2016-2017. Two rice cultivars, Nipponbare and Liangyoupeijiu were used. The salt stress included four salt levels with two 1-MCP levels were applied. The results showed that 1-MCP significantly reduced ethylene production in rice spikelets from LYP9 and NPBA respectively. 1-MCP improved Pn and SPAD value in rice leaf for both cultivars. 1-MCP improved the SOD, protein synthesis, chlorophyll contents, and biochemical traits in leaves. 1-MCP also modulated aboveground biomass, spikelets development, and grain yield for both cultivars at all salt stress levels. However, the LYP9 showed the better tolerance than the NPBA. The results revealed that 1-MCP can be employed to modulate growth and development in rice plants at different salt stress levels as a remedy.