期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
植物细胞膜固定化培养及产物释放行为研究 被引量:2
1
作者 袁其朋 元英进 胡宗定 《中草药》 CAS CSCD 北大核心 1996年第5期271-275,共5页
研究了植物细胞膜固定化培养中各种参数对反应器性能的影响,结果表明:细胞层厚度为7~8mm时生产能力可达到较高的水平;孔径为80μm的不锈钢丝网是合适的固定化长春花细胞膜材料;压力脉冲是促进胞内生物碱释放的有效手段;并在理论... 研究了植物细胞膜固定化培养中各种参数对反应器性能的影响,结果表明:细胞层厚度为7~8mm时生产能力可达到较高的水平;孔径为80μm的不锈钢丝网是合适的固定化长春花细胞膜材料;压力脉冲是促进胞内生物碱释放的有效手段;并在理论上建立计算反应器允许细胞层厚度的方法,计算结果与实验吻合较好。 展开更多
关键词 反应器 长春花 植物细膜 固定化培养
下载PDF
Responses of antioxidant defense system of epilithic mosses to drought stress in karst rock desertified areas 被引量:5
2
作者 Xianqiang Zhang Yuzhong Zhao Shijie Wang 《Acta Geochimica》 EI CAS CSCD 2017年第2期205-212,共8页
Barbula fallax Hedw., Erythrodontium julaceum(Schwaegr.) Par., and Bryum argenteum Hedw. are typical rock mosses growing on rocks in different terrestrial habitats. In this study, B. fallax and E. julaceum, which are ... Barbula fallax Hedw., Erythrodontium julaceum(Schwaegr.) Par., and Bryum argenteum Hedw. are typical rock mosses growing on rocks in different terrestrial habitats. In this study, B. fallax and E. julaceum, which are epilithic mosses growing in rock desertification in Guizhou, China, were used as ecophysiological mosses in a combination of field investigations and laboratory experiments. We also investigated the reference moss B. argenteum, which is a widely distributed moss in habitats with soil as substrate. Our research focused on the response of the antioxidant defense system of epilithic mosses to drought stress. Most antioxidant defense indicators increased initially, then declined at later stages of drought stress. In contrast, the carotenoid content increased constantly. In addition, there was an initial increase(albeit variable) in relative membrane permeability, with this parameter showing a parabolic trend in all of the epilithic mosses. Among the three species, E. julaceum demonstrated the strongest resistance followed by B. fallax and then by B. argenteum. The epilithic mosses displayed stronger resistance compared to the native mosses; the increase in O_2 content and other reactive oxygen species(ROS) at the early stage of drought stress induced the enzymatic and non-enzymatic scavenging systems tosequester ROS. Moreover, the radical scavenging ability and strong drought tolerance was maintained. The longterm growth of bryophyte under drought conditions in a karst environment can help eliminate the intense response of mosses to drought stress as they adapt. 展开更多
关键词 Rocky desertification of karst Epilithicmosses Antioxidase system Drought stress
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部