Effect of UV-B radiation on chlorophyll fluorescence, photosynthetic activity and relative chlorophyll content of five different corn hybrids

Jovanić, B.R.; Radenković, Božidar; Despotović-Zrakić, Marijana; Bogdanović, Zorica; Barać, Dušan

doi:10.1016/j.jpap.2022.100115

Cited by 19 publications

(12 citation statements)

References 36 publications

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“…Chlorophyll content was assayed to further understand how priming with αFe 2 O 3 NPs alleviates drought-induced growth inhibition ( Table 1 ) in sorghum plants. Chlorophyll is an important photosynthetic pigment that plays a vital role during photosynthesis and could be a good indication of changes in a plant’s metabolism and health under different environmental conditions [ 71 ]. Thus, any interference in photosynthesis might be linked to a disturbance in stomatal conductance and photosynthesis rate and efficiency and a reduction in leaf expansion and hence plant growth [ 72 , 73 , 74 ].…”

Section: Discussionmentioning

confidence: 99%

Green Synthesis of Iron Oxide (Hematite) Nanoparticles and Their Influence on Sorghum bicolor Growth under Drought Stress

Ndou

Rakgotho

Nkuna

et al. 2023

Plants

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Drought is a major abiotic stress that confronts plant growth and productivity, thus compromising food security. Plants use physiological and biochemical mechanisms to cope with drought stress, but at the expense of growth. Green-synthesized nanoparticles (NPs) have gained great attention in agriculture due to their environmental friendliness and affordability while serving as potential biofertilizers. This study investigates the role of hematite (αFe2O3) NPs, synthesized from Aspalathus linearis (rooibos), to improve Sorghum bicolor growth under drought stress. About 18 nm, spherical, and highly agglomerated hematite (αFe2O3) NPs were obtained. Sorghum seeds were primed with 5, 10, and 15 mg/L αFe2O3 NPs, and, after seven days of germination, the seedlings were transferred into potting soil, cultivated for fourteen days, and were subsequently water deprived (WD) for a further seven days. A reduction in plant height (78%), fresh (FW; 35%) and dry (DW; 36%) weights, and chlorophyll (chl) content ((total chl (81%), chla (135%), and chlb (1827%)) was observed in WD plants, and this correlated with low nutrients (Mg, Si, P, and K) and alteration in the anatomic structure (epidermis and vascular bundle tissues). Oxidative damage was observed as deep blue (O2●−) and brown (H2O2) spots on the leaves of WD plants, in addition to a 25% and 40% increase in oxidative stress markers (H2O2 and MDA) and osmolytes (proline and total soluble sugars), respectively. Seed priming with 10 mg/L αFe2O3 NPs improved plant height (70%), FW (56%), DW (34%), total Chl (104%), chla (160%) and chlb (1936%), anatomic structure, and nutrient distribution. Priming with 10 mg/L αFe2O3 NPs also protected sorghum plants from drought-induced oxidative damage by reducing ROS formation and osmolytes accumulation and prevented biomolecule degradation. The study concludes that green synthesized hematite NPs positively influenced sorghum growth and prevented oxidative damage of biomolecules by improving nutrient uptake and osmoregulation under drought stress.

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Section: Discussionmentioning

confidence: 99%

Green Synthesis of Iron Oxide (Hematite) Nanoparticles and Their Influence on Sorghum bicolor Growth under Drought Stress

Ndou

Rakgotho

Nkuna

et al. 2023

Plants

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“…In addition, pigments are also degraded by UV light, especially chlorophyll b and carotenoids, so exposure to this type of radiation can cause an imbalance in the proportion of pigments, with the consequent alteration of the photosynthetic apparatus, as has been observed recently in maize. After being exposed to UV radiation for 19 days, fluorescence and chlorophyll concentration decreased in several maize lines, although in different proportions in a line-dependent manner [22].…”

Section: Photosynthetic Alterationsmentioning

confidence: 97%

Ultraviolet Radiation and Its Effects on Plants

Correa¹,

Saavedra²,

Parra³

et al. 2023

Abiotic Stress in Plants - Adaptations to Climate Change

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Ultraviolet radiation is a portion of the electromagnetic spectrum ranging from 10 to 400 nm, classified into three main categories: UV-A (320–400 nm), UV-B (280–320 nm), and UV-C (100–280 nm). The UV radiation from the sun that crosses the atmosphere and reaches the earth’s surface is composed largely of UV-A radiation (95%) and, to a lesser extent, UV-B (5%), which is normally filtered by stratospheric ozone. With the thinning of the ozone layer, UV-B radiation penetrates deeper into the earth’s surface, where it becomes dangerous due to its high energy content that acts at the molecular level, affecting the cycles of carbon, nitrogen, and other elements, thus, having a direct impact on global warming. On the other hand, UV radiation alters numerous essential organic compounds for living organisms. Since its discovery, it has been established that e UV-B causes alterations in plant development and metabolism, both primary and secondary. In this chapter, we summarize the current knowledge about the effects of UV radiation on the morphological, biochemical, and genetic processes in plants.

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“…UV radiation causes dramatic changes in the biomass production, leaf development, stomas. All these changes directly affect photosynthesis [ 45 , 46 ]. During the early stages of exposure to UV-C radiation, the rate of degradation of the chlorophyll exceeds the rate of synthesis.…”

Section: Effect Of Different Treatments On Chlorophyllsmentioning

confidence: 99%

Chlorophylls as Natural Bioactive Compounds Existing in Food By-Products: A Critical Review

Ebrahimi

Shokramraji²,

Mihaylova

et al. 2023

Plants

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Chlorophylls are a group of naturally occurring pigments that are responsible for the green color in plants. This pigment group could have numerous health benefits due to its high antioxidant activity, including anti-inflammatory, anti-cancer, and anti-obesity properties. Many food by-products contain a high level of chlorophyll content. These by-products are discarded and considered environmental pollutants if not used as a source of bioactive compounds. The recovery of chlorophylls from food by-products is an interesting approach for increasing the sustainability of food production. This paper provides insight into the properties of chlorophylls and the effect of different treatments on their stability, and then reviews the latest research on the extraction of chlorophylls from a sustainable perspective.

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Effect of UV-B radiation on chlorophyll fluorescence, photosynthetic activity and relative chlorophyll content of five different corn hybrids

Cited by 19 publications

References 36 publications

Green Synthesis of Iron Oxide (Hematite) Nanoparticles and Their Influence on Sorghum bicolor Growth under Drought Stress

Green Synthesis of Iron Oxide (Hematite) Nanoparticles and Their Influence on Sorghum bicolor Growth under Drought Stress

Ultraviolet Radiation and Its Effects on Plants

Chlorophylls as Natural Bioactive Compounds Existing in Food By-Products: A Critical Review

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