Department of Geology and Pedology, Faculty of Forestry and Wood Technology, Mendel University in Brno, 613 00 Zemědělská 1, Czech Republic.
Biomolecules. 2019 Sep 19;9(9):507. doi: 10.3390/biom9090507.
Phytohormones, similar to soil enzymes, are synthesized and secreted into the soil environment by fungi and microorganisms. Phytohormones are involved in regulating microbial community activity in the rhizosphere. This paper examines how auxins, cytokinins, ethephon and chlorocholine chloride affect the activity of native soil proteases in the organo-mineral horizon of an alpine meadow. In the meadow habitat, native soil proteases were inhibited by auxins whereas the effect of cytokinins on these enzymes was not statistically significant. A similar inhibitory effect on the activity of proteases was shown for ethephon and chlorocholine chloride, both of which also inhibited the activity of native soil proteases in the alpine meadow soil. Overall, the inhibitory effect of phytohormones on the activity of native protease activity may affect plant nutrition by retarding the nitrogen cycle in the soil. This work contributes to our understanding of the influence of substances produced by the rhizosphere that can actively participate in the activity of soil microorganisms and consequently influence the soil nitrogen cycle.
植物激素与土壤酶类似，是由真菌和微生物合成并分泌到土壤环境中的。植物激素参与调节根际微生物群落的活性。本文研究了生长素、细胞分裂素、乙烯利和氯胆碱氯化物如何影响高山草甸有机-矿物层中原生土壤蛋白酶的活性。在草甸生境中，生长素抑制了原生土壤蛋白酶的活性，而细胞分裂素对这些酶的影响在统计学上并不显著。乙烯利和氯胆碱氯化物对蛋白酶活性也表现出类似的抑制作用，它们都抑制了高山草甸土壤中原生土壤蛋白酶的活性。总的来说，植物激素对原生蛋白酶活性的抑制作用可能会通过延缓土壤氮循环来影响植物的营养。这项工作有助于我们了解根际产生的物质对土壤微生物活性的影响，从而影响土壤氮循环。
