Changes of chlorophyll fluorescence parameters of different alfalfa in cold environment
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 +7 more
doaj
Changes in Chlorophyll a fluorescence and DNA as a plant response to UV-B radiation in Gnaphalium vira-vira [PDF]
Ozone depletion at southern latitudes has recently increased the fluence of ultraviolet-B (UV-B) radiation striking the ground. This phenomenon has sparked much interest in unravelling the effects of this harmful radiation on living systems.
Pedro Cuadra +4 more
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Non-photochemical quenching capacity in Arabidopsis thaliana affects herbivore behaviour. [PDF]
Under natural conditions, plants have to cope with numerous stresses, including light-stress and herbivory. This raises intriguing questions regarding possible trade-offs between stress defences and growth.
Hanna Johansson Jänkänpää +9 more
doaj +1 more source
Analysis of initial chlorophyll fluorescence induction kinetics in chloroplasts in terms of rate constants of donor side quenching release and electron trapping in photosystem II [PDF]
The fluorescence induction F(t) of dark-adapted chloroplasts has been studied in multi-turnover 1 s light flashes (MTFs). A theoretical expression for the initial fluorescence rise is derived from a set of rate equations that describes the sequence of ...
Vredenberg, W.J.
core +1 more source
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 +7 more
doaj +1 more source
Site, trigger, quenching mechanism and recovery of non-photochemical quenching in cyanobacteria: recent updates [PDF]
Cyanobacteria exhibit a novel form of non-photochemical quenching (NPQ) at the level of the phycobilisome. NPQ is a process that protects photosystem II (PSII) from possible highlight-induced photo-damage.
Bruno Robert +11 more
core +1 more source
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 +5 more
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Non Photochemical Quenching mechanism in higher plants and in the unicellular alga Chlamydomonas reinhardtii [PDF]
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
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Operation of photosynthetic apparatus of citrus leaves in winter and spring
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 +3 more
doaj +1 more source
Photosynthesis sensitivity to NH4+-N change with nitrogen fertilizer type
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
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