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首页> 外文期刊>African Journal of Biotechnology >The effects of drought stress on the activity of acid phosphatase and its protective enzymes in pigweed leaves
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The effects of drought stress on the activity of acid phosphatase and its protective enzymes in pigweed leaves

机译：干旱胁迫对紫草叶片酸性磷酸酶活性及其保护酶的影响

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A model of drought was created on pigweed and the effects of drought stress on the activity of acid phosphatase and its protective enzymes were examined. The pot-cultured pigweeds were divided into 4 groups (ten plants per group) when they reached 6 leaves. (1) In the control group, the culture media contained 70 - 85% of field moisture capacity, (2) In the second group, the mild drought stress group, the culture media contained 50 - 60% of field moisture capacity, (3) The moderate drought stress group had a culture media that contained 40 - 50% of field moisture capacity; (4) The severe drought stress group culture media contained 30 - 40% of field moisture capacity. All through the process of the present study, the pigweed plants were cultured under natural conditions on the rooftop of the laboratory building; though transferred indoor in rainy days to avoid the influence of natural precipitation. The plants were sampled and detected every five days after the administration of drought stress. The results clearly demonstrated that the drought stress significantly enhanced the activity of acid phosphatase, membrane permeability and MDA contents; though the activity of acid phosphatase declined after a certain time of drought stress, the extent of membrane permeability and MDA contents still increased with the time. The membrane permeability and MDA contents were correlated with a correlation coefficient of 0.963, 0.971 and 0.939 under mild, moderate and severe drought stress, respectively. The activity of superoxide dismutase (SOD), peroxide dismutase (POD) and hydrogen peroxidase (CAT) was also enhanced with increase in the intensity of drought stress or the prolongation of drought stress at first and then decreased some time afterwards. It was concluded that drought stress enhanced the activity of acid phosphatase, membrane permeability and MDA in the pigweed plants, which was able to resist a certain drought stress by enhancing the activity of protective enzymes. However, excessive drought stress markedly affected the metabolic systems of enzyme and decreased the activity of enzyme.
机译：建立了紫草干旱模型，研究了干旱胁迫对酸性磷酸酶及其保护酶活性的影响。盆栽的杂草达到6片叶子时分为4组（每组10株植物）。 （1）在对照组中，培养基的田间持水量为70-85％;（2）在第二组中，在轻度干旱胁迫组中，培养基的田间持水量为50-60％（3 ）中度干旱胁迫组的培养基含有田间水分含量的40-50％; （4）严重干旱胁迫组培养基含有30-40％的田间水分容量。在本研究的整个过程中，都在自然条件下在实验室大楼的屋顶上培养了杂草植物。尽管在雨天转移到室内以避免自然降水的影响。施用干旱胁迫后每五天对植物取样并检测一次。结果清楚地表明，干旱胁迫显着提高了酸性磷酸酶的活性，膜通透性和MDA含量。虽然在干旱一定时间后酸性磷酸酶的活性下降，但膜渗透性和MDA含量仍随时间增加。在轻度，中度和重度干旱胁迫下，膜的通透性和MDA含量分别与相关系数为0.963、0.971和0.939。超氧化物歧化酶（SOD），过氧化物歧化酶（POD）和氢过氧化物酶（CAT）的活性首先随着干旱胁迫强度的增加或干旱胁迫时间的延长而增强，然后在一段时间后降低。结论：干旱胁迫增强了紫草植物中酸性磷酸酶的活性，膜通透性和丙二醛（MDA），能够通过增强保护酶的活性来抵抗一定的干旱胁迫。然而，过度的干旱胁迫显着影响酶的代谢系统并降低酶的活性。

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