The Phenomenon of Photoinhibition of Photosynthesis and Its Importance in Reforestation

Alves, Pedro Luís da Costa Aguiar; Magalhães, Antonio Celso Novaes de; Barja, Paulo Roxo

doi:10.1663/0006-8101(2002)068[0193:tpopop]2.0.co;2

Cited by 94 publications

(15 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This acclimation consists of, among other things, an aggregation of the chloroplasts, thus reducing the quantity of light received by the seedling (Alves et al 2002). Senser et al (1975) observed such an aggregation in Norway spruce (Picea abies (L.) Karst) needles during hardening.…”

Section: Discussionmentioning

confidence: 99%

Relationships between frost hardiness, root growth potential, and photosynthesis of nursery-grown white spruce seedlings

Carles

Lamhamedi²,

Stowe

et al. 2011

Annals of Forest Science

View full text Add to dashboard Cite

& Context Root growth is a characteristic to which nursery personnel is particularly attentive. The increase in root growth of white spruce seedlings in the autumn relies on the current season's photosynthates. Needle hardening or a decrease in the mass of photosynthetically active foliage as a result of early frost may negatively affect the seedling's photosynthetic capacity and its ability to fuel root growth. & Aims This study evaluated the relationship between cold hardiness, root growth potential, and photosynthesis of 2-year-old white spruce seedlings. & Methods At the end of their second growing season under standard cultural practices in a forest nursery, seedlings were hardened under natural conditions of photoperiod and temperature. After being subjected to artificial freezing tests on four sampling dates during the fall, the seedlings were compared for cold tolerance and recovery of gas exchange. & Results The effect of artificial freezing treatments on seedling photosynthesis varied with frost intensity and degree of needle hardening. The mass of new roots formed over a 21-day cultivation test period following the freeze tests was positively related to the photosynthetic capacity of the seedlings and negatively related to the proportion of damaged needles. & Conclusion These results imply that autumnal cold damage to needles directly affects seedling root growth and emphasize the importance of maintaining seedlings in an environment favorable for photosynthesis during the fall to promote root growth.

show abstract

Section: Discussionmentioning

confidence: 99%

Relationships between frost hardiness, root growth potential, and photosynthesis of nursery-grown white spruce seedlings

Carles

Lamhamedi²,

Stowe

et al. 2011

Annals of Forest Science

View full text Add to dashboard Cite

show abstract

“…Seedlings of neotropical trees are subjected to numerous abiotic stresses when transplanted to deforested areas, which may affect their survival in the field 1–3 . Hence, neotropical seedlings need to pass through the acclimation or hardening process in the nursery, which is usually achieved by the growth of the seedlings under full sun 4–7 .…”

Section: Introductionmentioning

confidence: 99%

Effects of nitric oxide-releasing nanoparticles on neotropical tree seedlings submitted to acclimation under full sun in the nursery

Lopes-Oliveira

Gomes

Pelegrino

et al. 2019

Sci Rep

View full text Add to dashboard Cite

Polymeric nanoparticles have emerged as carrier systems for molecules that release nitric oxide (NO), a free radical involved in plant stress responses. However, to date, nanoencapsulated NO donors have not been applied to plants under realistic field conditions. Here, we verified the effects of free and nanoencapsulated NO donor, S-nitroso-mercaptosuccinic acid (S-nitroso-MSA), on growth, physiological and biochemical parameters of neotropical tree seedlings kept under full sunlight in the nursery for acclimation. S-nitroso-MSA incorporation into chitosan nanoparticles partially protected the NO donor from thermal and photochemical degradation. The application of nanoencapsulated S-nitroso-MSA in the substrate favoured the growth of seedlings of Heliocarpus popayanensis, a shade-intolerant tree. In contrast, free S-nitroso-MSA or nanoparticles containing non-nitrosated mercaptosuccinic acid reduced photosynthesis and seedling growth. Seedlings of Cariniana estrellensis, a shade-tolerant tree, did not have their photosynthesis and growth affected by any formulations, despite the increase of foliar S-nitrosothiol levels mainly induced by S-nitroso-MSA-loaded nanoparticles. These results suggest that depending on the tree species, nanoencapsulated NO donors can be used to improve seedling acclimation in the nursery.

show abstract

“…The phenomenon is described as photoinhibition and occurs when a plant absorbs more light than it is capable of processing through photosynthesis, which leads to damaging the photosynthetic apparatus, mainly PSII. It is also noteworthy that photoinhibition may be either reversible, when it serves as a defense mechanism for the photosynthetic system, or irreversible, when it stems from damage thereto [9]. The process of photosynthesis utilizes under 5% of sunlight energy.…”

Section: Introductionmentioning

confidence: 99%

“…Measurements of chlorophyll a fluorescence allow one to determine the condition of the photosynthetic apparatus and overall physiological condition of higher plants [9]. For this purpose, different types of fluorometers can be used which are fairly easy to operate and provide a fast and noninvasive measurement [6].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of Electromagnetic Stimulation of Seeds on the Photosynthetic Indicators in Medicago sativa L. Leaves at Various Stages of Development

Dziwulska‐Hunek

Kornarzyńska-Gregorowicz

Niemczynowicz

et al. 2020

Agronomy

View full text Add to dashboard Cite

The paper explores the impact of electromagnetic stimulation of Ulstar alfalfa seeds on fresh mass yield, the quantum efficiency of the plants’ photochemical reactions, and the content of photosynthetic pigments in leaves. Before sowing, seeds were subjected to electromagnetic stimulation in the following configurations: control (C), no stimulation; stimulation with He–Ne laser light with the wavelength of 632.8 nm, surface power density of 3 mW·cm−2 and exposition time of 1 min (L1) or 5 min (L5); stimulation with alternating magnetic field with the induction of 30 mT and exposition time of 1 min (F1) or 5 min (F5). It was established that the variability of alfalfa yields at the onset of anthesis was dependent on weather conditions as well as, above all, on the electromagnetic stimulation employed. At the same time, the values of fresh mass yield of alfalfa and photosynthetic efficiency were higher in the first year of cultivation (2014) compared to the last year (2016). In terms of photosynthetic efficiency, the best results were observed for L1 and F5, respectively: 0.801 and 0.800. The significantly highest values in terms of chlorophyll a and b and carotenoid content were observed in 2014 at the onset of budding in the combination involving alternating magnetic field stimulation (F5), and were, respectively, 30%, 28% and 73% relative to the control.

show abstract

The Phenomenon of Photoinhibition of Photosynthesis and Its Importance in Reforestation

Cited by 94 publications

References 68 publications

Relationships between frost hardiness, root growth potential, and photosynthesis of nursery-grown white spruce seedlings

Relationships between frost hardiness, root growth potential, and photosynthesis of nursery-grown white spruce seedlings

Effects of nitric oxide-releasing nanoparticles on neotropical tree seedlings submitted to acclimation under full sun in the nursery

Influence of Electromagnetic Stimulation of Seeds on the Photosynthetic Indicators in Medicago sativa L. Leaves at Various Stages of Development

Contact Info

Product

Resources

About