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首页> 外文期刊>Acta Horticulturae >Effects of water stress on leaf antioxidant enzymes activities and protein contents in five Prunus rootstocks
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Effects of water stress on leaf antioxidant enzymes activities and protein contents in five Prunus rootstocks

机译：水分胁迫对五个灌木植物中叶抗氧化酶活性和蛋白质含量的影响

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In this study, the effects of water stress on the ascorbate peroxidase (APX), peroxidase (POD), catalase (CAT) and superoxide dismutase (SOD) antioxidant enzyme activities and total soluble protein contents in the leaves of five Prunus rootstocks (Arda, GF 677, Garnem, Rootpac-20 and Nemaguard) were investigated. One-year-old plants were grown in 18-L containers and treated with two levels of deficit irrigation regimes for water stress: 50% field capacity (FC) and 25% FC. Control plants were irrigated at field capacity (100% FC). Leaf samples were taken on day 24 after starting the treatments. Antioxidant enzyme activities and protein contents of leaves showed variations with both rootstocks and levels of irrigation. Stressed plants exposed to 25% FC showed the tendency to have higher APX activity than control plants, and the contrary for those exposed to 50% FC, although differences among rootstocks and treatments were not significant in most cases. POD and SOD activities (0.63 A460 min1 mg-1 protein and 9.56 U mg1 protein, respectively) were higher in the leaves of Garnem rootstock exposed to 50% FC, although it did not differ significantly from Arda 25%FC. Total protein (6.26 mg ml/1) was higher in the control plants of Rootpac-20 and Arda rootstock. In general, water stress reduced leaves protein content. In addition, the Garnem rootstock seemed to induce a higher enzymatic response based on POD and SOD activities under severe water stress conditions compared to the other rootstocks.
机译：在该研究中，水分胁迫对抗坏血酸过氧化物酶（APX），过氧化物酶（POD），过氧化物酶和超氧化物歧化酶（SOD）抗氧化酶活性的影响，五个蛋白砧木的叶片中的总可溶性蛋白质含量（ARDA，研究了GF 677，Garnem，Rootpac-20和Nemaguard）。一岁的植物在18升容器中生长，并用两种水平的赤字灌溉制度进行处理，用于水分胁迫：50％的现场容量（Fc）和25％Fc。在现场容量（100％Fc）下灌溉对照植物。在开始治疗后第24天拍摄叶样品。抗氧化酶活性和蛋白质含量与砧木和灌溉水平的变化表现出变化。暴露于25％Fc的强调植物显示出比对照植物更高的APX活性的趋势，并且对于暴露于50％Fc的那些，尽管在大多数情况下，砧木和治疗的差异并不显着。荚和SOD活性（0.63A460 min1mg-1蛋白和9.56u mg1蛋白）在暴露于50％Fc的Garnem砧木叶中较高，但它没有从ARDA 25％FC显着差异。 Rootpac-20和Arda砧木的对照植物中，蛋白质（6.26mg ml / 1）较高。通常，水胁迫降低了蛋白质含量。此外，与其他砧木相比，基于豆荚和SOD活性的豆荚和SOD活性似乎诱导诱导更高的酶促反应。

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