Expression Profile Analysis of Early Development and Gravity Response of Germinating Ceratopteris richardii Spores by Mari
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Profile and analysis of gene expression changes during early development in germinating spores of Ceratopteris richardii.
Analysis of an expressed sequence tag library with more than 5,000 sequences from spores of the fern Ceratopteris richardii reveals that more than 3,900 of them represent distinct genes, and almost 70% of these have significant similarity to Arabidopsis (Arabidopsis thaliana) genes. Eight genes are common between three very different dormant plant systems, Ceratopteris spores, Arabidopsis seeds...
متن کاملNitric oxide and cGMP signaling in calcium-dependent development of cell polarity in Ceratopteris richardii.
Single-celled spores of the fern Ceratopteris richardii undergo gravity-directed cell polarity development that is driven by polar calcium currents. Here we present results that establish a role for nitric oxide (NO)/cGMP signaling in transducing the stimulus of gravity to directed polarization of the spores. Application of specific NO donors and scavengers inhibited the calcium-dependent gravi...
متن کاملThe influence of gravity and light on developmental polarity of single cells of Ceratopteris richardii gametophytes.
The gametophyte generation of Ceratopteris richardii is being used in a number of laboratories as a model plant system for developmental studies (Chasan, 1992). It is an especially valuable system for the study of the effect of gravity on plants in that the detection and response to gravity take place in the single-celled spore during its germination. The most visible evidence of the control of...
متن کاملProfiling gene expression during early gametophyte development and sex determination in Ceratopteris richardii
Atallah, Nadia Ph.D., Purdue University, May 2015. Profiling Gene Expression During Early Gametophyte Development and Sex Determination in Ceratopteris Richardii. Major Professor: Jo Ann Banks. In the fern Ceratopteris richardii, every spore has the potential to develop as either a male or hermaphroditic gametophyte. Gametophyte sex is determined by a GA-like pheromone (ACE) that is secreted by...
متن کاملSummary of Research Title: Cellular bases of light-regulated gravity responses Grant Number: NAG2- 1347
This report summarizes the most significant research accomplished in our NAG21347 project on the cellular bases of light-regulated gravity responses, It elaborates mainly on our discovery of the role of calcium currents in gravity-directed polar development in single germinating spore cells of the fern Ceratopteris, our development of RNA silencing as a viable method of suppressing the expressi...
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