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以生物土壤结皮中土生对齿藓(Didymodon vinealis)和真藓(Bryum argenteum)为材料,研究了逐渐干旱胁迫下二者的信号传导相关物质的响应。结果表明:随干旱胁迫的增强,2种苔藓的细胞膜与液泡膜H+-ATPase活性增强,提高了二者的K+含量,增加了二者的渗透压,促进了二者的抗旱信号转导物质的合成;ABA对二者的信号转导作用都不明显,NO对土生对齿藓的抗旱作用不明显,但能提高真藓的抗旱性,而Ca2+只对土生对齿藓有明显信号转导作用,对真藓作用不明显。
In response to the signal transduction-related substances both under the gradually increasing soil water stress in the soil of Didymodon vinealis and Bryum argenteum in biological soil crusts, The results showed that with the increase of drought stress, the activity of H + -ATPase increased in both cell membrane and tonoplast of two kinds of moss, which increased the content of K + and increased the osmotic pressure of both, promoted the expression of drought-resistant signal transduction substance ABA had no obvious signal transduction effect on them. NO had no significant effect on drought resistance of native moss, but increased the drought resistance of true moss. However, Ca2 + only had obvious signal transduction on native moss , The role of true moss is not obvious.