目的探讨精氨酸抗利尿激素(AVP)对急性肺损伤肺水肿液清除作用。方法 48只健康成年的雄性SD大鼠随机分为对照组、模型组(ALI组)、AVP组,观察各组肺组织病理形态学、肺水含量、肺泡上皮通透性及肺泡液体清除率(AFC)变化,测定肺泡上皮钠通...目的探讨精氨酸抗利尿激素(AVP)对急性肺损伤肺水肿液清除作用。方法 48只健康成年的雄性SD大鼠随机分为对照组、模型组(ALI组)、AVP组,观察各组肺组织病理形态学、肺水含量、肺泡上皮通透性及肺泡液体清除率(AFC)变化,测定肺泡上皮钠通道(ENa C)和钠/钾ATP酶(Na+,K+-ATPase)表达情况。结果经AVP治疗后,模型组肺泡上皮通透性(0.27±0.15 vs0.59±0.19)及肺水含量(5.01±1.59 vs 8.67±1.79)减轻,AFC增加(23.56±4.51 vs 8.28±3.57),α-ENa C(1.296±0.322 vs 0.349±0.141)和α1-Na+,K+-ATPase表达增加(1.421±0.389 vs 0.338±0.186),均有显著差异(P<0.05)。结论 AVP能促进AFC,其作用途径可能是上调α-ENa C和α1-Na+,K+-ATPase通道蛋白实现的。展开更多
The okra germplasm was screened for salinity tolerance at the seedling stage and during plant ontogeny. Substantial variation existed in okra for salinity tolerance at the seedling stage. An 80 mmol/L NaCI concentrati...The okra germplasm was screened for salinity tolerance at the seedling stage and during plant ontogeny. Substantial variation existed in okra for salinity tolerance at the seedling stage. An 80 mmol/L NaCI concentration was suitable for discriminating tolerant and non-tolerant okra genotypes. The pooled ranking of the genotypes, based on individual rankings for each trait (root and shoot length, germination percentage, and relative Na^+ and K%+) in individual NaCI concentrations, was effective for selecting tolerant genotypes. Genotypes selected at the seedling stage maintained their tolerance to NaCI during plant ontogeny, suggesting that screening of the germplasm entries and advanced breeding materials for salt tolerance at the seedling stage is effective. Among 39 okra genotypes, five were identified as the most tolerant genotypes and showed potential for use in breeding programs that focus on the development of salt-tolerant, high-yield okra cultivars.展开更多
文摘目的探讨精氨酸抗利尿激素(AVP)对急性肺损伤肺水肿液清除作用。方法 48只健康成年的雄性SD大鼠随机分为对照组、模型组(ALI组)、AVP组,观察各组肺组织病理形态学、肺水含量、肺泡上皮通透性及肺泡液体清除率(AFC)变化,测定肺泡上皮钠通道(ENa C)和钠/钾ATP酶(Na+,K+-ATPase)表达情况。结果经AVP治疗后,模型组肺泡上皮通透性(0.27±0.15 vs0.59±0.19)及肺水含量(5.01±1.59 vs 8.67±1.79)减轻,AFC增加(23.56±4.51 vs 8.28±3.57),α-ENa C(1.296±0.322 vs 0.349±0.141)和α1-Na+,K+-ATPase表达增加(1.421±0.389 vs 0.338±0.186),均有显著差异(P<0.05)。结论 AVP能促进AFC,其作用途径可能是上调α-ENa C和α1-Na+,K+-ATPase通道蛋白实现的。
基金Project supported by the Indigenous 5000 Fellowship Program(Batch II)of the Higher Education Commission,Pakistan
文摘The okra germplasm was screened for salinity tolerance at the seedling stage and during plant ontogeny. Substantial variation existed in okra for salinity tolerance at the seedling stage. An 80 mmol/L NaCI concentration was suitable for discriminating tolerant and non-tolerant okra genotypes. The pooled ranking of the genotypes, based on individual rankings for each trait (root and shoot length, germination percentage, and relative Na^+ and K%+) in individual NaCI concentrations, was effective for selecting tolerant genotypes. Genotypes selected at the seedling stage maintained their tolerance to NaCI during plant ontogeny, suggesting that screening of the germplasm entries and advanced breeding materials for salt tolerance at the seedling stage is effective. Among 39 okra genotypes, five were identified as the most tolerant genotypes and showed potential for use in breeding programs that focus on the development of salt-tolerant, high-yield okra cultivars.