AI Article Synopsis
Article Abstract
In the subtropics, a few tropical tree species are distributed and planted for ornamental and horticultural purposes; however, the photosynthesis of these species can be impaired by chilling. This study aimed to understand how these species respond to chilling. Light-dependent and CO assimilation reactions of six tropical tree species from geographically diverse areas, but grown at a lower subtropical site in China, were monitored during a chilling (≤ 10°C). Chilling induced stomatal and nonstomatal effects and moderate photoinhibition of PSII, with severe effect in . was little affected by chilling, with negligible reduction of photosynthesis and PSII activity, higher cyclic electron flow (CEF), and oxidation state of P700 (P700). Photoinhibition of PSII thus reduced electron flow to P700, while active CEF reduced oxidative damage of PSI and maintained photosynthesis during chilling. Studied parameters revealed that coupling between light-dependent and CO assimilation reactions was enhanced under chilling.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11515820 | PMC |
| http://dx.doi.org/10.32615/ps.2022.039 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Photosystem II efficiency in response to diurnal and seasonal variations in photon flux density and air temperature for green, yellow-green, and purple-leaved cultivars of sweet potato [ (L.) Lam].
Photosynthetica
February 2024
Department of Life Sciences, Center of Global Change Biology, and Innovation and Development Center of Sustainable Agriculture, National Chung-Hsing University, 40227 Taichung, Taiwan.
This study aimed to investigate the impact of diurnal and seasonal variations in photon flux density (PPFD) and air temperature on PSII efficiency in three sweet potato leaf-color cultivars: green (G), yellow-green (Y), and purple (P). The cultivars were exposed to full sunlight and measurements were taken from November to March. The maximal quantum yield of PSII photochemistry for the dark-adapted state (F/F) indicated Y's increased sensitivity to low temperatures at predawn, followed by G and P.
View Article and Find Full Text PDFContributions by Christa Critchley to photosynthesis research and to plant ecophysiology.
Photosynthetica
January 2024
Department of Plant Biology, Department of Biochemistry, and Center of Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
Christa Critchley is a distinguished researcher in basic and applied photosynthesis research. Her research has centered on the structure and function of chloroplasts and the application of chlorophyll fluorescence to understanding the way PSII works. In her research, she used two biophysical tools, Nuclear Magnetic Resonance (NMR) and Chlorophyll (Chl) fluorescence, as well as several other biochemical and plant physiological methods.
View Article and Find Full Text PDFGenome-wide survey of chlorophyllase (CLH) gene family in seven Rosaceae and functional characterization of MdCLH1 in apple (Malus domestica) leaf photosynthesis.
Plant Physiol Biochem
December 2024
College of Horticulture, Gansu Agricultural University, Lanzhou, 730070, China. Electronic address:
Article Synopsis
- Chlorophyll is essential for photosynthesis in plants, and its breakdown is facilitated by chlorophyllase (CLH), which has not been thoroughly studied in Rosaceae species, especially in apples.
- In this research, 20 different CLH genes were identified across seven Rosaceae species, with variations in their amino acid composition, structure, and location within the plant cells.
- The study also discovered that these CLHs are active in response to environmental factors and are predominantly expressed in leaf tissues, with MdCLH1 specifically shown to localize in chloroplasts of tobacco leaves.
Hydrogen peroxide mediates melatonin-induced chilling tolerance in cucumber seedlings.
Plant Cell Rep
November 2024
Key Laboratory of Horticultural Crop Biology and Germplasm Innovation in Huanghuai Region of Agriculture and Rural Affairs Ministry, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, China.
Article Synopsis
- Melatonin (MT) enhances chilling tolerance in cucumbers by improving antioxidant systems, photosynthesis, and activating cold-responsive genes, with an optimal concentration of 100 µM.
- * Hydrogen peroxide (HO) acts as a downstream signaling molecule in this process, aiding MT's effects on chilling resistance.
- * Both MT and HO reduce damaging effects of chilling, such as malondialdehyde levels and electrolyte leakage, while boosting key photosynthetic enzyme activity and gene expression.
Drought tolerance and recovery capacity of two ornamental shrubs: Combining physiological and biochemical analyses with online leaf water status monitoring for the application in urban settings.
Plant Physiol Biochem
November 2024
University of Florence, Department of Agriculture, Food, Environment and Forestry, Sesto Fiorentino, 50019, Florence, Italy; National Research Council of Italy (CNR), Institute for Sustainable Plant Protection, Sesto Fiorentino, 50019, Florence, Italy. Electronic address:
When plants are transferred from nursery to urban environments, they often face drought stress due to inadequate maintenance, such as insufficient irrigation. Using drought tolerant species may help mitigate the adverse impact of drought stress in urban settings. Additionally, utilizing novel technologies for water status monitoring may help optimize irrigation schedules to prevent transplanting failures.
View Article and Find Full Text PDFWant 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!