Abstract
Gibberellins (GAs) play a major role in a variety of key plant development processes, especially in promoting seed germination, stem and root growth, and fruit development. DELLA proteins are the core elements in GA signal transduction pathway, which exist in the plant nucleus and belong to the GRAS protein family. DELLA proteins negatively regulate the GA signaling pathway and biosynthesis, inhibiting plant growth. DELLA proteins can also interact with F-box, PIFS, ROS, SCLl3 and other proteins to enhance plant response to various adverse environmental influences such as drought, low and high temperature, heavy metal stresses. In addition, DELLA proteins can also partially regulate plant growth and development through interacting plant hormones such as ABA (abscisic acid), CK (cytokinin), ET (ethylene), BR (brassinosteroid) and JA (jasmine). This review summarized the basic characteristics of DELLA proteins, the transduction of hormone and environmental signals, as well as the regulation of plant growth and developments. DELLA proteins have broad application prospects in modern agricultural production in the future, but the molecular mechanism of DELLA proteins regulating plant growth and development are still unclear, and needs further study.
Highlights
Plants are regulated by a variety of environmental factors and hormones in the process of growth and development
ABI3 (Abscisic acid insensive3) and ABI5 transcription factors, as core regulatory proteins in the abscisic acid (ABA) signal transduction pathway, could interact with DELLA proteins to jointly induce the expression of SOMNUS (SOM) gene to mediate the inhibition of high temperature on seed germination(Lim et al, 2013)
DELLA proteins are key repressors of GA signaling, acting as a negative regulator involved in plant growth and developments
Summary
Plants are regulated by a variety of environmental factors and hormones in the process of growth and development. DELLA proteins RGA and GAI interacted directly with Type-B ARRs response regulators in the CK signaling pathway to form a transcriptional activator complex to jointly regulate the expression of CK response genes (Marín-de la Rosa et al, 2014). To affect the GAs synthesis, ABA inhibited root growth by regulating the stability of DELLA proteins and acted on the downstream of DELLA genes (Achard et al, 2006).
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
