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Monitoring the stability of Rubisco in micropropagated grapevine (Vitis vinifera L.) by two-dimensional electrophoresis
Journal of Plant Physiology ( IF 4.3 ) Pub Date : 2005-04-01 , DOI: 10.1016/j.jplph.2004.09.013
Luísa C Carvalho 1 , Maria G Esquível , Isabel Martins , C Pinto Ricardo , Sara Amâncio
Affiliation  

Plants cultured in vitro suffer from several physiological and biochemical impairments due to the artificial conditions of growth, namely the composition of the heterotrophic media. Upon transfer to ex vitro, the higher irradiances, compared to in vitro, can lead to oxidative stress symptoms, which can be counteracted by CO2 concentrations above atmospheric levels. Here we analyse the stability of Rubisco in in vitro grapevine plantlets, and after transfer to ex vitro under four acclimatization treatments: low irradiance (LL, 150 micromol m(-2)s(-1)) and high irradiance (HL, 300 micromol m(-2)s(-1)) in association with CO2 concentrations of 350 (LCO2) and 700 (HCO2) microL L(-1). Proteins were separated with SDS polyacrylamide gel electrophoresis and two-dimensional electrophoresis and Rubisco degradation peptides were analysed by immunoblotting with anti-LSU antibodies. These degradation products were present in the leaves of plantlets under both in vitro and ex vitro treatments. Under LCO2 they were maintained for almost all of the 28 days of the acclimatization period, while becoming scarcely detected after 14 days under HCO2 and after 7 days when HCO2 was associated with HL. These results appear to confirm the counteraction of HCO2 concentrations over the oxidative stress eventually caused by HL. The patterns of soluble sugars in acclimatizing leaves under HLHCO2 also gave an indication of a faster acquisition of autotrophic characteristics.

中文翻译:

通过二维电泳监测微繁殖葡萄 (Vitis vinifera L.) 中 Rubisco 的稳定性

由于人工生长条件,即异养培养基的组成,体外培养的植物遭受多种生理和生化损伤。转移到体外后,与体外相比,更高的辐照度会导致氧化应激症状,这可以通过高于大气水平的二氧化碳浓度来抵消。在这里,我们分析了 Rubisco 在体外葡萄苗中的稳定性,以及在四种驯化处理下转移到体外后的稳定性:低辐照度(LL,150 微摩尔 m(-2)s(-1))和高辐照度(HL,300 微摩尔) m(-2)s(-1)) 与 350 (LCO2) 和 700 (HCO2) microL L(-1) 的 CO2 浓度相关。用 SDS 聚丙烯酰胺凝胶电泳和二维电泳分离蛋白质,用抗 LSU 抗体通过免疫印迹分析 Rubisco 降解肽。在体外和体外处理下,这些降解产物都存在于小植株的叶子中。在 LCO2 下,它们几乎在适应期的 28 天里都保持不变,而在 HCO2 下 14 天后和 HCO2 与 HL 相关的 7 天后几乎检测不到。这些结果似乎证实了 HCO2 浓度对最终由 HL 引起的氧化应激的抵消作用。在 HLHCO2 下适应叶片中可溶性糖的模式也表明更快地获得自养特性。这些降解产物在体外和体外处理下都存在于小植株的叶子中。在 LCO2 下,它们几乎在适应期的 28 天里都保持不变,而在 HCO2 下 14 天后和 HCO2 与 HL 相关的 7 天后几乎检测不到。这些结果似乎证实了 HCO2 浓度对最终由 HL 引起的氧化应激的抵消作用。在 HLHCO2 下适应叶片中可溶性糖的模式也表明更快地获得自养特性。这些降解产物在体外和体外处理下都存在于小植株的叶子中。在 LCO2 下,它们几乎在适应期的 28 天里都保持不变,而在 HCO2 下 14 天后和 HCO2 与 HL 相关的 7 天后几乎检测不到。这些结果似乎证实了 HCO2 浓度对最终由 HL 引起的氧化应激的抵消作用。在 HLHCO2 下适应叶片中可溶性糖的模式也表明更快地获得自养特性。这些结果似乎证实了 HCO2 浓度对最终由 HL 引起的氧化应激的抵消作用。在 HLHCO2 下适应叶片中可溶性糖的模式也表明更快地获得自养特性。这些结果似乎证实了 HCO2 浓度对最终由 HL 引起的氧化应激的抵消作用。在 HLHCO2 下适应叶片中可溶性糖的模式也表明更快地获得自养特性。
更新日期:2005-04-01
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