We have located links that may give you full text access.
Journal Article
Research Support, Non-U.S. Gov't
Shoot Removal Induces Chloroplast Development in Roots via Cytokinin Signaling.
Plant Physiology 2017 April
The development of plant chloroplasts is regulated by various developmental, environmental, and hormonal cues. In Arabidopsis ( Arabidopsis thaliana ), chloroplast development is repressed in roots via auxin signaling. However, roots develop chloroplasts when they are detached from the shoot. In contrast to auxin, cytokinin positively affects chloroplast development in roots, but the role and signaling pathway of cytokinin in the root greening response remain unclear. To understand the regulatory pathways of chloroplast development in the plant stress response, we examined the mechanisms underlying the conditional greening of detached roots. In wild-type Arabidopsis roots, shoot removal activates type B ARABIDOPSIS RESPONSE REGULATOR (ARR)-mediated cytokinin signaling and induces chlorophyll accumulation and photosynthetic remodeling. ARR1 and ARR12 are essential for up-regulating nucleus- and plastid-encoded genes associated with chloroplast development in detached roots. In this process, WOUND INDUCED DEDIFFERENTIATION1 and class B GATA transcription factors (B-GATAs) act upstream and downstream of ARRs, respectively. Overexpression of B-GATAs promotes root greening, as does shoot removal, dependent on a light signaling transcription factor, LONG HYPOCOTYL5. Auxin represses the root greening response independent of ARR signaling. GNC-LIKE ( GNL ), a B-GATA, is strongly up-regulated in detached roots via ARR1 and ARR12 but is repressed by auxin, so GNL may function at the point of convergence of cytokinin and auxin signaling in the root greening response.
Full text links
Related Resources
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app
All material on this website is protected by copyright, Copyright © 1994-2024 by WebMD LLC.
This website also contains material copyrighted by 3rd parties.
By using this service, you agree to our terms of use and privacy policy.
Your Privacy Choices
You can now claim free CME credits for this literature searchClaim now
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app