scholarly journals A Peptide Encoding Gene MdCLE8 Regulates Lateral Root Development in Apple

2021 ◽  
Author(s):  
Tian-en Zhang ◽  
Yan Shi ◽  
Xiu-ming Li ◽  
Qiang Zhao ◽  
Chun-xiang You
Keyword(s):  
Root Development ◽  
Lateral Root ◽  
Nitrogen Deficiency ◽  
Ectopic Expression ◽  
Peptide Hormones ◽  
Signal Molecule ◽  
Root Cortex ◽  
Lateral Root Development ◽  
Cle Peptide ◽  
Essential Nutrient

Abstract Nitrogen is not only an essential nutrient for plant, but also an important signal molecule to integrate and regulate gene expression, metabolism and growth. Plant peptides are considered as a new hormone, and play an important regulatory role in plant growth and development. However, there are few researches on the co-regulation network between nitrogen and peptide hormones in plant. Here we identified an apple MdCLE8 gene, which encodes a putative peptide, induced by nitrogen deficiency in apple. Ectopic expression of MdCLE8 inhibited lateral root formation in Arabidopsis under nitrogen deficiency. Similarly, overexpression of MdCLE8 inhibited lateral root development in apple adventitious roots, and this inhibition was amplified under nitrogen deficiency treatment. Further studies showed that MdCLE8 may inhibit the expression of several key genes during lateral root emergence stage in Arabidopsis, thereby inhibiting the emergence of lateral root from root cortex cells. Collectively, our study not only broadened the gene regulatory network under the influence of nitrogen in apple, but also expanded the function of CLE peptide hormones in apple.

scholarly journals CLE-CLAVATA1 Signaling Pathway Modulates Lateral Root Development under Sulfur Deficiency

Plants ◽  
2019 ◽  
Vol 8 (4) ◽  
pp. 103 ◽  
Author(s):  
Wei Dong ◽  
Yinghua Wang ◽  
Hideki Takahashi
Keyword(s):  
Root Development ◽  
Lateral Root ◽  
Molecular Mechanisms ◽  
Plant Root ◽  
Root System Architecture ◽  
Wild Type ◽  
Lateral Root Development ◽  
S Deficiency ◽  
Cle Peptide ◽  
Plant Root System

Plant root system architecture changes drastically in response to availability of macronutrients in the soil environment. Despite the importance of root sulfur (S) uptake in plant growth and reproduction, molecular mechanisms underlying root development in response to S availability have not been fully characterized. We report here on the signaling module composed of the CLAVATA3 (CLV3)/EMBRYO SURROUNDING REGION (CLE) peptide and CLAVATA1 (CLV1) leucine-rich repeat receptor kinase, which regulate lateral root (LR) development in Arabidopsis thaliana upon changes in S availability. The wild-type seedlings exposed to prolonged S deficiency showed a phenotype with low LR density, which was restored upon sulfate supply. In contrast, the clv1 mutant showed a higher daily increase rate of LR density relative to the wild-type under prolonged S deficiency, which was diminished to the wild-type level upon sulfate supply, suggesting that CLV1 directs a signal to inhibit LR development under S-deficient conditions. CLE2 and CLE3 transcript levels decreased under S deficiency and through CLV1-mediated feedback regulations, suggesting the levels of CLE peptide signals are adjusted during the course of LR development. This study demonstrates a fine-tuned mechanism for LR development coordinately regulated by CLE-CLV1 signaling and in response to changes in S availability.

Lateral root formation and nutrients: nitrogen in the spotlight

2021 ◽  
Author(s):  
Pierre-Mathieu Pélissier ◽  
Hans Motte ◽  
Tom Beeckman
Keyword(s):  
Signaling Pathways ◽  
Root System ◽  
Root Development ◽  
Lateral Root ◽  
Molecular Mechanisms ◽  
Root Formation ◽  
Lateral Roots ◽  
Nutrient Use Efficiency ◽  
Lateral Root Formation ◽  
Lateral Root Development

Abstract Lateral roots are important to forage for nutrients due to their ability to increase the uptake area of a root system. Hence, it comes as no surprise that lateral root formation is affected by nutrients or nutrient starvation, and as such contributes to the root system plasticity. Understanding the molecular mechanisms regulating root adaptation dynamics towards nutrient availability is useful to optimize plant nutrient use efficiency. There is at present a profound, though still evolving, knowledge on lateral root pathways. Here, we aimed to review the intersection with nutrient signaling pathways to give an update on the regulation of lateral root development by nutrients, with a particular focus on nitrogen. Remarkably, it is for most nutrients not clear how lateral root formation is controlled. Only for nitrogen, one of the most dominant nutrients in the control of lateral root formation, the crosstalk with multiple key signals determining lateral root development is clearly shown. In this update, we first present a general overview of the current knowledge of how nutrients affect lateral root formation, followed by a deeper discussion on how nitrogen signaling pathways act on different lateral root-mediating mechanisms for which multiple recent studies yield insights.

scholarly journals Brassinosteroids Interact with Auxin to Promote Lateral Root Development in Arabidopsis

2004 ◽  
Vol 134 (4) ◽  
pp. 1624-1631 ◽  
Author(s):  
Fang Bao ◽  
Junjiang Shen ◽  
Shari R. Brady ◽  
Gloria K. Muday ◽  
Tadao Asami ◽  
...  
Keyword(s):  
Root Development ◽  
Lateral Root ◽  
Lateral Root Development

scholarly journals Peroxisomal CuAOζ and its product H2O2 regulate the distribution of auxin and IBA-dependent lateral root development in Arabidopsis

2017 ◽  
Vol 68 (17) ◽  
pp. 4851-4867 ◽  
Author(s):  
Yana Qu ◽  
Qing Wang ◽  
Jinhe Guo ◽  
Peipei Wang ◽  
Ping Song ◽  
...  
Keyword(s):  
Root Development ◽  
Lateral Root ◽  
Lateral Root Development
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