http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Xing-guang Deng (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Li-jun Zhu,Xing-guang Deng,Li-juan Zou,Peng-xu Li,Jun-qiang Wu,Da-wei Zhang,Honghui Lin 한국식물학회 2017 Journal of Plant Biology Vol.60 No.1
Celastrol is an active triterpenoid compound isolated from Tripterygium wilfordii Hook F.. Many reports have highlighted that celastrol is an effective, safe and desirable approach to the treatment of cancers. However, their biological function during environmental stresses in plants is rarely reported. In the present study, the effects of celastrol on the tolerance against high light (HL), polyethylene glycol (PEG) and cold stress in cucumber (Cucumis sativus L.) were investigated. Celastrol pretreatment could enhance cucumber seedlings stress tolerance at a concentration of 1 μg ml–1. The results showed that pretreatment with 1 μg ml–1 celastrol clearly induced the activities of antioxidative enzymes, which subsequently alleviated stress-induced oxidative damage in plant cells. We also provided evidence that celastrol upregulated ABA biosynthetic gene NCED2 expression and ABA accumulation in cucumber seedlings, which resulted to the enhanced tolerance in response to environmental stresses. Furthermore, the celastrol-pretreated seedlings showed less photosystem damaged caused by the stress conditions, when compared with the control. Therefore, our findings provide a novel role of celastrol in plant against environmental stresses and indicate that the celastrol-induced activities of antioxidative enzymes and ABA content might contribute to the stress tolerance.
-
Proanthocyanidins accelerate the germination of cucumber (Cucumis sativus L.) seeds
Li-jun Zhu,Xing-guang Deng,Li-juan Zou,Jun-qiang Wu,Da-wei Zhang,Honghui Lin 한국식물학회 2016 Journal of Plant Biology Vol.59 No.2
Proanthocyanidins (PAs) are the end products of the flavonoid biosynthetic pathway in many seeds, but their biological function is rarely unknown during seed germination. In the present study, we observed that PAs pretreatment accelerated cucumber seeds germination with maximum efficiency at 0.15% by measuring germination percentage and radical length. Using inhibitors of abscisic acid (ABA), gibberellins (GA) and alternative oxidase (AOX) and H2O2 scavenger pretreatment and gene expression analysis, we found that the accelerated effect of 0.15% PAs on seed germination was due to the decreased ABA biogenesis and enhanced GA production. ROS are induced by PAs pretreatment. Then, the enhanced ROS contributed to GA and ethylene accumulation and ABA decrease in seeds. Moreover, the improvement of GA was involved in the further induction of antioxidant enzymes activities. Therefore, our findings uncover a novel role of PAs in seed germination and clarify the relationships between ROS, ABA, GA and ethylene during seed germination.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
