In this chapter, we review the main organogenesis features and associated regulation processes of the moss Physcomitrella patens (P. patens), the model plant for the Bryophytes. We highlight how the study of this descendant of the earliest plant species that colonized earth, brings useful keys to understand the mechanisms that determine and control both vascular and non vascular plants organogenesis. Despite its simple morphogenesis pattern, P. patens still requires the fine tuning of organogenesis regulators, including hormone signalling, common to the whole plant kingdom, and which study is facilitated by a high number of molecular tools, among which the powerful possibility of gene targeting/replacement. The recent discovery of moss cells reprogramming capacity completes the picture of an excellent model for studying plant organogenesis.
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http://dx.doi.org/10.1007/978-1-62703-221-6_2 | DOI Listing |
Sci Adv
December 2024
Department of Biological Sciences, University of Rhode Island, Kingston, RI 02881, USA.
Similar to cellulose synthases (CESAs), cellulose synthase-like D (CSLD) proteins synthesize β-1,4-glucan in plants. CSLDs are important for tip growth and cytokinesis, but it was unknown whether they form membrane complexes in vivo or produce microfibrillar cellulose. We produced viable CESA-deficient mutants of the moss to investigate CSLD function without interfering CESA activity.
View Article and Find Full Text PDFPlant Biol (Stuttg)
January 2025
ITQB NOVA-Instituto de Tecnologia Química e Biológica António Xavier, Oeiras, Portugal.
Isoprenoids comprise the largest group of plant specialized metabolites. 1-deoxy-D-xylulose-5-phosphate synthase (DXS) is one of the major rate-limiting enzymes in their biosynthesis. The DXS family expanded structurally and functionally during evolution and is believed to have significantly contributed to metabolic complexity and diversity in plants.
View Article and Find Full Text PDFNew Phytol
January 2025
Department of Life Science, Rikkyo University, Tokyo, 171-8501, Japan.
The sexual reproductive organs of bryophytes - in which gametes necessary for fertilization are produced, namely, male antheridia and female archegonia - are formed from vegetative haploid gametophytes. In dioicous bryophytes such as Marchantia polymorpha, the genes within the sex-determining regions in distinct sexual strains have been identified. However, in monoicous bryophytes such as Physcomitrium patens, how the two sex fates are specified on the same gametophyte remained unknown.
View Article and Find Full Text PDFBiochim Biophys Acta Bioenerg
January 2025
Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, 100093 Beijing, China; University of Chinese Academy of Sciences, 100049 Beijing, China; China National Botanical Garden, 100093 Beijing, China; Academician Workstation of Agricultural High-Tech Industrial Area of the Yellow River Delta, National Center of Technology Innovation for Comprehensive Utilization of Saline-Alkali Land, Dongying 257300, China. Electronic address:
Photosystem I (PSI) is a large membrane photosynthetic complex that harvests sunlight and drives photosynthetic electron transport. In both green algae and higher plants, PSI's ultrafast energy transfer and charge separation kinetics have been characterized. In contrast, it is not yet clear in Physcomitrella patens, even though moss is one of the earliest land plants and represents a critical stage in plant evolution.
View Article and Find Full Text PDFBiochem Biophys Res Commun
December 2024
The Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China.
Pretreatment of Physcomitrium patens with abscisic acid (ABA) has been shown to induce desiccation tolerance. While previous research suggests that ABA-induced production of proteins and soluble sugars contributes to desiccation stress tolerance, additional mechanisms underlying this tolerance remain unclear. In this study, we found that ABA pretreatment led to increased levels of digalactosyl diacylglycerol (DGDG), phosphatidylcholine (PC), and phosphatidylinositol (PI), along with a decrease in monogalactosyl diacylglycerol (MGDG).
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