Results 31 to 40 of about 209,633 (263)

Effects of spine-shading on aspects of photosynthesis for three cactus species

Botan‪ical Sciences, 2016
We evaluated the effect of spine removal on three cactus species varying in spine-shading of stems. Turbinicarpus schmiedickeanus showed the greater spine shading (c. 61 %), followed by Mammillaria zephyranthoides (43 %), and Echinocactus platyacanthus (
Edilia de la Rosa-Manzano, Joel Flores, Pablo Delgado-Sánchez   +2 more
doaj   +1 more source

A kinetic model of non-photochemical quenching in cyanobacteria

Biochimica et Biophysica Acta (BBA) - Bioenergetics, 2011
High light poses a threat to oxygenic photosynthetic organisms. Similar to eukaryotes, cyanobacteria evolved a photoprotective mechanism, non-photochemical quenching (NPQ), which dissipates excess absorbed energy as heat. An orange carotenoid protein (OCP) has been implicated as a blue-green light sensor that induces NPQ in cyanobacteria. Discovered in
Gorbunov, Maxim Y., Kuzminov, Fedor I., Fadeev, Victor V., Kim, John Dongun, Falkowski, Paul G.   +4 more
openaire   +2 more sources

Changes of chlorophyll fluorescence parameters of different alfalfa in cold environment

Siliao yanjiu, 2023
The experiment was conducted to study the changes of chlorophyll fluorescence parameters of alfalfa under cold environment, aiming at screening the germplasm materials suitable for planting in Heilongjiang Province.
WANG Xiao-long, FENG Peng, YANG Zhao, XU Yan-xia, CHAI Hua, LI Sha-sha, WU Yue, GAO Hai-juan   +7 more
doaj  

Operation of photosynthetic apparatus of citrus leaves in winter and spring

浙江大学学报. 农业与生命科学版, 2006
Optimum temperature for photosynthesis of citrus leaves planted in field was lower in winter than in spring, and it was higher than environmental temperature in winter.
ZENG Guang-hui, GUO Yan-ping, WANG Fa-ge, WU Zhen-wang   +3 more
doaj   +1 more source

Diurnal Cycle Relationships between Passive Fluorescence, PRI and NPQ of Vegetation in a Controlled Stress Experiment

Remote Sensing, 2017
In order to estimate vegetation photosynthesis from remote sensing observations; some critical parameters need to be quantified. From all absorbed light; the plant needs to release any excess that is not used for photosynthesis; by non-photochemical ...
Luis Alonso, Shari Van Wittenberghe, Julia Amorós-López, Joan Vila-Francés, Luis Gómez-Chova, Jose Moreno   +5 more
doaj   +1 more source

Tomato Bio-Protection Induced by Pseudomonas fluorescens N21.4 Involves ROS Scavenging Enzymes and PRs, without Compromising Plant Growth

Plants, 2021
Aims: to discover the interrelationship between growth, protection and photosynthesis induced by Pseudomonas fluorescens N21.4 in tomato (Lycopersicum sculentum) challenged with the leaf pathogen Xanthomonas campestris, and to define its priming ...
Ana García-Villaraco, Lamia Boukerma, Jose Antonio Lucas, Francisco Javier Gutierrez-Mañero, Beatriz Ramos-Solano   +4 more
doaj   +1 more source

Non Photochemical Quenching mechanism in higher plants and in the unicellular alga Chlamydomonas reinhardtii [PDF]

, 2010
Light is a necessary ecological factor for oxygenic photoautotrophic organisms. Plants and algae require light for life but it can sometimes become a limiting factor or even cause stress events.
Guadagno, Carmela Rosaria
core   +1 more source

Utility of Photochemical Traits as Diagnostics of Thermal Tolerance amongst Great Barrier Reef Corals

Frontiers in Marine Science, 2018
Light availability is considered a key factor regulating the thermal sensitivity of reef building corals, where excessive excitation of photosystem II (PSII) further exacerbates pressure on photochemical pathways already compromised by heat stress. Coral
Matthew R. Nitschke, Matthew R. Nitschke, Stephanie G. Gardner, Samantha Goyen, Lisa Fujise, Emma F. Camp, Peter J. Ralph, David J. Suggett   +7 more
doaj   +1 more source

Regulatory effects of silicon nanoparticles on the growth and photosynthesis of cotton seedlings under salt and low-temperature dual stress

BMC Plant Biology, 2023
Background Silicon nanoparticles (SiO2-NPs) play a crucial role in plants mitigating abiotic stress. However, the regulatory mechanism of SiO2-NPs in response to multiple stress remains unclear.
Yueping Liang, Hao Liu, Yuanyuan Fu, Penghui Li, Shuang Li, Yang Gao   +5 more
doaj   +1 more source

Photosynthesis sensitivity to NH4+-N change with nitrogen fertilizer type

Plant, Soil and Environment, 2014
N-fertilization type affected differently tomato growth. In the field experiment, hydroponic cultures were conducted using NO3-N (5 mmol); mixture of KNO3-N (3 mmol) and (NH4)2SO4-N (2 mmol); NH4+-N (5 mmol) or urea (5 mmol) as nitrogen source.
A. Nasraoui-Hajaji, H. Gouia
doaj   +1 more source