Department of Biotechnology and Microbiology, L.N. Gumilyov Eurasian University, Astana, Kazakhstan.
Department of Biotechnology and Microbiology, L.N. Gumilyov Eurasian University, Astana, Kazakhstan; Department of Biology and Chemistry, A. Baitursynov Kostanay State University, Kostanay, Kazakhstan.
J Plant Physiol. 2018 Sep;228:189-196. doi: 10.1016/j.jplph.2018.06.009. Epub 2018 Jun 19.
The influence of molybdenum, tungsten on germination and growth of barley Hordeum vulgare L. was studied. Results of this study revealed the differential effect of heavy metals on seedlings growth. Exogenous molybdenum treatment stimulated the growth of seedlings. The addition of the metal significantly stimulated root elongation. Contrastingly, the addition of tungsten resulted in increased seed germination and inhibits the growth of seedlings. The negative effect of tungsten on the growth of barley was more profound for roots of plants. In addition, the influence of metals on the growth of plants was also tested in saline conditions. It is shown that under salinity stress plant growth drastically decreased in presence of tungsten. Results of this study showed that activity of molybdenum-containing aldehyde oxidase (AO; EC 1.2.3.1) was also significantly affected by metals. The activity of AO in leaves and roots enhanced with increasing concentrations of molybdate, while tungstate treatment inhibited the enzyme activity. Perhaps, the differential influence of molybdenum and tungsten on the growth of barley is a direct effect of metals on aldehyde oxidase activity in plants. Moreover, the intense negative effect of tungsten treatment on barley growth under salinity conditions emphasizes an important role of aldehyde oxidase in plant resistance to stress factors.
研究了钼、钨对大麦（Hordeum vulgare L.）萌发和生长的影响。研究结果表明，重金属对幼苗生长有不同的影响。外源性钼处理刺激了幼苗的生长。添加该金属显著刺激了根的伸长。相比之下，添加钨导致种子萌发增加，并抑制幼苗生长。钨对植物根系生长的负面影响更为明显。此外，还在盐胁迫条件下测试了金属对植物生长的影响。结果表明，在存在钨的情况下，盐胁迫下植物生长急剧下降。本研究结果表明，含钼醛氧化酶（AO；EC 1.2.3.1）的活性也受到金属的显著影响。钼酸盐浓度增加时，AO 在叶片和根中的活性增强，而钨酸盐处理抑制了酶活性。也许，钼和钨对大麦生长的不同影响是金属对植物醛氧化酶活性的直接影响。此外，钨处理在盐胁迫条件下对大麦生长的强烈负面影响强调了醛氧化酶在植物抵抗胁迫因素中的重要作用。
