This study was to investigate the effects of three exogenous substances on chemical constituents of Isatis indigotica leavesand their efficacy in alleviating drought stress, and explore the methods of applying exogeno...This study was to investigate the effects of three exogenous substances on chemical constituents of Isatis indigotica leavesand their efficacy in alleviating drought stress, and explore the methods of applying exogenous substances to efficient cultivationof Isatis indigotica. Polyethylene glycol (PEG) was used to simulate drought stress to deal with seeds of Isatis indigotica at thegermination stage (concentration: 0, 10%, 15%, and 20%). Simultaneous operation of exogenous growth regulators [microbialinoculum (MI), γ-aminobutyric acid (GABA) and salicylic acid (SA)] and PEG were implemented in seeds of Isatis indigotica.The effects of drought stress and the mitigation of exogenous substances were observed by statistics of seed germination potential,germination rate, hypocotyl length, and radicle length of each treatment. The effects of exogenous substances on the content ofalkaloids, crude protein and free amino acids in the leaves of Isatis indigotica grown in a greenhouse were determined after sprayingexogenous substances on the plants. The differences of germination potential, germination rate, hypocotyl length, and radicle lengthamong 15% PEG stress treatment, 10% PEG stress treatment and the control were significant (P<0.05). According to the predesignedgermination standard, the seeds did not germinate under 20% PEG stress treatment. When the PEG concentration was 15%, the resultsof seed germination potential and germination rate after adding MI were significantly different from those under stress alone (P<0.05).When exposed to 10% PEG stress, the supplementation of GABA led to a notable increase in radicle length of Isatis indigotica seeds,showing significant differences compared to other three treatments. The application of MI and GABA under 15% PEG stress resultedin a significant increase in the radicle and hypocotyl length of Isatis indigotica seeds compared to other two treatments. The contentof the total alkaloids in leaves of Isatis indigotica was significantly increased after spraying GABA. Meanwhile, the contents of crudeprotein and the total free amino acids were kept constant after spraying exogenous substances. Application of MI and GABA couldalleviate drought stress of Isatis indigotica. The content of the total alkaloids in leaves of Isatis indigotica could significantly increaseafter spraying GABA.展开更多
为筛选低毒、安全、高效的杀菌剂用以防治板蓝根霜霉病,选取了6种药剂在田间验证了其对板蓝根霜霉病的防治效果,并对作物安全性进行了评价。结果表明,供试药剂均可获得一定的防治效果,其中防治效果较好的为1%申嗪霉素悬浮剂、8%嘧啶核...为筛选低毒、安全、高效的杀菌剂用以防治板蓝根霜霉病,选取了6种药剂在田间验证了其对板蓝根霜霉病的防治效果,并对作物安全性进行了评价。结果表明,供试药剂均可获得一定的防治效果,其中防治效果较好的为1%申嗪霉素悬浮剂、8%嘧啶核苷可湿性粉剂、250 g/L嘧菌酯悬浮剂和52.5%噁酮·霜脲氰水分散粒剂4种药剂,每667 m2推荐剂量分别为100~120 m L、800~1 500倍液、50~90 m L、30~50 g,所有药剂均对板蓝根生长安全、无药害。该研究为生产上防治板蓝根霜霉病提供了用药指导。展开更多
板蓝根,十字花科植物菘蓝Isatis indigotica Fort .的干燥根,具有清热解毒、凉血、利咽的功效,是临床常用的抗病毒类大宗药材之一。其在中医药学中历史悠久,临床应用广泛,常用于流行性感冒、急慢性咽炎、腮腺炎、病毒性肝炎等疾病的治...板蓝根,十字花科植物菘蓝Isatis indigotica Fort .的干燥根,具有清热解毒、凉血、利咽的功效,是临床常用的抗病毒类大宗药材之一。其在中医药学中历史悠久,临床应用广泛,常用于流行性感冒、急慢性咽炎、腮腺炎、病毒性肝炎等疾病的治疗。板蓝根是我国的传统中药材之一,具有清热解毒、凉血、利咽的功效。其用药历史悠久,临床应用广泛,有着重要的开发价值。本文将从板蓝根的本草考证、传统应用及现代研究等方面展开系统综述,以期为板蓝根的进一步研究及合理开发利用提供科研思路和临床参考。展开更多
基金the Doctoral Research Initiation Foundation of Changzhi Medical College(BS202005)。
文摘This study was to investigate the effects of three exogenous substances on chemical constituents of Isatis indigotica leavesand their efficacy in alleviating drought stress, and explore the methods of applying exogenous substances to efficient cultivationof Isatis indigotica. Polyethylene glycol (PEG) was used to simulate drought stress to deal with seeds of Isatis indigotica at thegermination stage (concentration: 0, 10%, 15%, and 20%). Simultaneous operation of exogenous growth regulators [microbialinoculum (MI), γ-aminobutyric acid (GABA) and salicylic acid (SA)] and PEG were implemented in seeds of Isatis indigotica.The effects of drought stress and the mitigation of exogenous substances were observed by statistics of seed germination potential,germination rate, hypocotyl length, and radicle length of each treatment. The effects of exogenous substances on the content ofalkaloids, crude protein and free amino acids in the leaves of Isatis indigotica grown in a greenhouse were determined after sprayingexogenous substances on the plants. The differences of germination potential, germination rate, hypocotyl length, and radicle lengthamong 15% PEG stress treatment, 10% PEG stress treatment and the control were significant (P<0.05). According to the predesignedgermination standard, the seeds did not germinate under 20% PEG stress treatment. When the PEG concentration was 15%, the resultsof seed germination potential and germination rate after adding MI were significantly different from those under stress alone (P<0.05).When exposed to 10% PEG stress, the supplementation of GABA led to a notable increase in radicle length of Isatis indigotica seeds,showing significant differences compared to other three treatments. The application of MI and GABA under 15% PEG stress resultedin a significant increase in the radicle and hypocotyl length of Isatis indigotica seeds compared to other two treatments. The contentof the total alkaloids in leaves of Isatis indigotica was significantly increased after spraying GABA. Meanwhile, the contents of crudeprotein and the total free amino acids were kept constant after spraying exogenous substances. Application of MI and GABA couldalleviate drought stress of Isatis indigotica. The content of the total alkaloids in leaves of Isatis indigotica could significantly increaseafter spraying GABA.
文摘为筛选低毒、安全、高效的杀菌剂用以防治板蓝根霜霉病,选取了6种药剂在田间验证了其对板蓝根霜霉病的防治效果,并对作物安全性进行了评价。结果表明,供试药剂均可获得一定的防治效果,其中防治效果较好的为1%申嗪霉素悬浮剂、8%嘧啶核苷可湿性粉剂、250 g/L嘧菌酯悬浮剂和52.5%噁酮·霜脲氰水分散粒剂4种药剂,每667 m2推荐剂量分别为100~120 m L、800~1 500倍液、50~90 m L、30~50 g,所有药剂均对板蓝根生长安全、无药害。该研究为生产上防治板蓝根霜霉病提供了用药指导。
文摘板蓝根,十字花科植物菘蓝Isatis indigotica Fort .的干燥根,具有清热解毒、凉血、利咽的功效,是临床常用的抗病毒类大宗药材之一。其在中医药学中历史悠久,临床应用广泛,常用于流行性感冒、急慢性咽炎、腮腺炎、病毒性肝炎等疾病的治疗。板蓝根是我国的传统中药材之一,具有清热解毒、凉血、利咽的功效。其用药历史悠久,临床应用广泛,有着重要的开发价值。本文将从板蓝根的本草考证、传统应用及现代研究等方面展开系统综述,以期为板蓝根的进一步研究及合理开发利用提供科研思路和临床参考。