Boron Induced Oxidative Stress, Antioxidant Defence Response and Changes in Artemisinin Content in Artemisia annua L.
Boron Induced Oxidative Stress, Antioxidant Defence Response and Changes in Artemisinin Content in Artemisia annua L.
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DOI：
10.1111/j.1439-037x.2010.00427.x
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发表时间：
2010-12-01
影响因子：
3.5
通讯作者：
Ram, M.
中科院分区：
文献类型：
--
作者：
Aftab, T.;Khan, M. M. A.;Ram, M.
硼是植物必需的微量营养素，对于大多数植物来说，硼的缺乏和毒性水平之间的范围很窄。像其他元素一样，硼在高浓度下对生长有毒。土壤中高浓度的硼降低了世界上许多地区的作物产量。研究了硼浓度（0、0.50、1.00、1.50、2.00 mm）对黄花蒿（Artemisia annua）氧化胁迫、抗氧化防御反应和青蒿素含量的影响。硼毒降低了生长参数，即茎高，鲜重和干重。处理诱导的氧化胁迫导致较低的净光合速率，气孔导度，内部CO2和总叶绿素含量。抗氧化酶如CAT、POX和SOD的活性也随着硼胁迫水平的增加而增加。然而，H2O2和青蒿素的含量被发现是高高达1.00毫米浓度的硼相比，控制，并在应用更高的剂量，进一步降低的内容，得到。因此，结果表明，可以利用硼的温和胁迫来提高青蒿素的产量。
Boron is an essential plant micronutrient and the range between deficient and toxic levels of boron is narrow for most of the plants. Like other elements, boron becomes toxic to growth at high concentrations. High boron concentrations in soil reduce crop productivity in many areas of the world. The effect of increasing levels of boron (0, 0.50, 1.00, 1.50, 2.00 mm) on oxidative stress, antioxidant defence response and changes in artemisinin content in Artemisia annua were investigated in the present study. Boron toxicity reduced the growth parameters viz. stem height, fresh weight and dry weight. Treatments induced oxidative stress resulting in lower net photosynthetic rate, stomatal conductance, internal CO2 and total chlorophyll content. The increased activities of antioxidant enzymes like CAT, POX and SOD were also noted in response to increasing levels of boron stress. However, H2O2 and artemisinin content were found to be high up to 1.00 mm concentration of boron compared to control, and on applying higher doses, further reduced contents were obtained. Thus, the results suggest that a mild stress of boron can be utilized for enhanced artemisinin production.