In the vineyards of Rhineland-Palatinate (Germany), two different types of Shepherd's Purse () coexist: (1) the common type called 'wild type', and (2) the decandric type called or ' with four stamens in place of the four petals. In this study, we compare the anatomical and physiological characters of rosette leaves of the respective types. Progeny of individual plants was cultivated in growth chambers under low- and high-light conditions. Under low-light conditions, the stomata densities of the adaxial and abaxial epidermis did not differ between the two types. When grown under high-light conditions, wild type and , both exhibited increased stomata densities compared to low-light conditions, but to a lesser extent than the wild type. The maximal photosynthetic capacity of was lower in both, low-light and high-light conditions compared to wild-type plants. Under all CO concentrations, seemed to be less productive. The less effective CO assimilation of the mutant was accompanied by later flowering This fact prolonged the vegetative phase of by about two weeks and was sufficient for the maintenance of both populations stably over years.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7301897 | PMC |
| http://dx.doi.org/10.7717/peerj.9226 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Evaluating Photosynthetic Light Response Models for Leaf Photosynthetic Traits in Paddy Rice ( L.) Under Field Conditions.
Plants (Basel)
December 2024
Institute of Agricultural Science and Technology Information, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China.
Accurate photosynthetic parameters obtained from photosynthetic light-response curves (LRCs) are crucial for enhancing our comprehension of plant photosynthesis. However, the task of fitting LRCs is still demanding due to diverse variations in LRCs under different environmental conditions, as previous models were evaluated based on a limited number of leaf traits and a small number of LRCs. This study aimed to compare the performance of nine LRC models in fitting a set of 108 LRCs measured from paddy rice ( L.
View Article and Find Full Text PDFNitrogen Assimilation Plays a Role in Balancing the Chloroplastic Glutathione Redox Potential Under High Light Conditions.
Plant Cell Environ
January 2025
The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel.
Nitrate reduction requires reducing equivalents produced by the photosynthetic electron transport chain. Therefore, it has been suggested that nitrate assimilation provides a sink for electrons under high light conditions. We tested this hypothesis by monitoring photosynthetic efficiency and the chloroplastic glutathione redox potential (chl-E) of plant lines with mutated glutamine synthetase 2 (GS2) and ferredoxin-dependent glutamate synthase 1 (GOGAT1).
View Article and Find Full Text PDFHarnessing the dynamics of plant organic acids metabolism following abiotic stresses.
Plant Physiol Biochem
December 2024
National Institute of Science and Technology on Plant Physiology Under Stress Conditions, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900, Viçosa, MG, Brazil. Electronic address:
Plants encounter various environmental stresses throughout development, including shade, high light, drought, hypoxia, extreme temperatures, and metal toxicity, all of which adversely affect growth and productivity. Organic acids (OAs), besides serving as intermediates in the tricarboxylic acid (TCA) cycle, play crucial roles in multiple metabolic pathways and cellular compartments, including mitochondrial metabolism, amino acid metabolism, the glyoxylate cycle, and the photosynthetic mechanisms of C4 and CAM plants. OAs contribute to stress tolerance by acting as root chelating agents, regulating ATP production, and providing reducing power for detoxifying reactive oxygen species (ROS).
View Article and Find Full Text PDFNew Strains of the Deep Branching Streptophyte Streptofilum: Phylogenetic Position, Cell Biological and Ecophysiological Traits, and Description of Streptofilum arcticum sp. nov.
Environ Microbiol
January 2025
Institute for Biological Sciences, Applied Ecology and Phycology, University Rostock, Rostock, Germany.
Streptofilum capillatum was recently described and immediately caught scientific attention, because it forms a phylogenetically deep branch in the streptophytes and is characterised by a unique cell coverage composed of piliform scales. Its phylogenetic position and taxonomic rank are still controversial discussed. In the present study, we isolated further strains of Streptofilum from biocrusts in sand dunes and Arctic tundra soil.
View Article and Find Full Text PDFChloroplast arrangement in finger millet under low-temperature conditions.
Biochim Biophys Acta Gen Subj
January 2025
RIKEN Center for Sustainable Resource Science, Yokohama 230-0045, Japan; Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan.
Background: Finger millet, a C plant with mesophyll and bundle sheath cells, has been cultivated at high altitudes in the Himalayas owing to its adaptability to stressful environments. Under environmental stresses such as high light and drought, finger millet mesophyll chloroplasts move toward the bundle sheath, a phenomenon known as aggregative arrangement.
Methods: To investigate the effect of low temperatures on mesophyll chloroplast arrangement in finger millet, we conducted microscopic observations and photochemical measurements using leaves treated at different temperatures in light or darkness, with or without pharmacological inhibitors.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!