.png){kind=icon}
返回
Calcium dynamics during trap closure visualized in transgenic Venus flytrap
.png){kind=icon}
PRE
AI
DOI：10.1038/s41477-020-00773-1.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
A transgenic Venus flytrap expressing a fluorescent calcium sensor allows real-time live quantification of calcium waves triggered by sensory hair movement. The study suggests that calcium levels represent the molecular basis for the memory effect that requires two stimulations within 30 s. The leaves of the carnivorous plant Venus flytrap,Dionaea muscipula(Dionaea) close rapidly to capture insect prey. The closure response usually requires two successive mechanical stimuli to sensory hairs on the leaf blade within approximately 30 s (refs.(1-4)). An unknown biological system in Dionaea is thought to memorize the first stimulus and transduce the signal from the sensory hair to the leaf blade(2). Here, we link signal memory to calcium dynamics using transgenic Dionaea expressing a Ca(2+)sensor. Stimulation of a sensory hair caused an increase in cytosolic Ca(2+)concentration ([Ca2+](cyt)) starting in the sensory hair and spreading to the leaf blade. A second stimulus increased [Ca2+](cyt)to an even higher level, meeting a threshold that is correlated to the leaf blade closure. Because [Ca2+](cyt)gradually decreased after the first stimulus, the [Ca2+](cyt)increase induced by the second stimulus was insufficient to meet the putative threshold for movement after about 30 s. The Ca(2+)wave triggered by mechanical stimulation moved an order of magnitude faster than that induced by wounding in petioles ofArabidopsis thaliana(5)and Dionaea. The capacity for rapid movement has evolved repeatedly in flowering plants. This study opens a path to investigate the role of Ca(2+)in plant movement mechanisms and their evolution.
Keyword:
MECHANISM
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
IF:
13.6
论文数:
2.8K
被引数:
1.8W
机构
引用论文
Polyubiquitin promoter-based binary vectors for overexpression and gene silencing in Lotus japonicus.png)
molecular plant
molecular plantIF3.4
PREAI
分享收藏
分享收藏
查看更多内容