scholarly journals Insights into Plant Programmed Cell Death Induced by Heavy Metals—Discovering a Terra Incognita

Cells ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 65
Author(s):  
Klaudia Sychta ◽  
Aneta Słomka ◽  
Elżbieta Kuta
Keyword(s):  
Heavy Metals ◽  
Cell Death ◽  
Abiotic Stress ◽  
Programmed Cell Death ◽  
Abiotic Factors ◽  
Genetic Regulation ◽  
Stress Factors ◽  
Suitable Model ◽  
Abiotic Stress Factors ◽  
Terra Incognita

Programmed cell death (PCD) is a process that plays a fundamental role in plant development and responses to biotic and abiotic stresses. Knowledge of plant PCD mechanisms is still very scarce and is incomparable to the large number of studies on PCD mechanisms in animals. Quick and accurate assays, e.g., the TUNEL assay, comet assay, and analysis of caspase-like enzyme activity, enable the differentiation of PCD from necrosis. Two main types of plant PCD, developmental (dPCD) regulated by internal factors, and environmental (ePCD) induced by external stimuli, are distinguished based on the differences in the expression of the conserved PCD-inducing genes. Abiotic stress factors, including heavy metals, induce necrosis or ePCD. Heavy metals induce PCD by triggering oxidative stress via reactive oxygen species (ROS) overproduction. ROS that are mainly produced by mitochondria modulate phytotoxicity mechanisms induced by heavy metals. Complex crosstalk between ROS, hormones (ethylene), nitric oxide (NO), and calcium ions evokes PCD, with proteases with caspase-like activity executing PCD in plant cells exposed to heavy metals. This pathway leads to very similar cytological hallmarks of heavy metal induced PCD to PCD induced by other abiotic factors. The forms, hallmarks, mechanisms, and genetic regulation of plant ePCD induced by abiotic stress are reviewed here in detail, with an emphasis on plant cell culture as a suitable model for PCD studies. The similarities and differences between plant and animal PCD are also discussed.

scholarly journals The Impact of Biotic and Abiotic Stress Factors on Development of European Ash Tissue Cultures

Forests ◽  
2022 ◽  
Vol 13 (1) ◽  
pp. 59
Author(s):  
Katarzyna Nawrot-Chorabik ◽  
Małgorzata Sułkowska ◽  
Małgorzata Osmenda ◽  
Vasyl Mohytych ◽  
Ewa Surówka ◽  
...  
Keyword(s):  
Abiotic Stress ◽  
Abiotic Factors ◽  
Harmful Effect ◽  
Stress Factors ◽  
Tissue Cultures ◽  
Biotic And Abiotic Stress ◽  
Pathogenic Potential ◽  
Abiotic Stress Factors ◽  
The Impact ◽  
European Ash

Fraxinus excelsior L. is threatened by a variety of environmental factors causing a decline of the species. The most important biotic factors negatively affecting the condition of the F. excelsior population are fungi such as the pathogen Hymenoscyphus fraxineus. Abiotic factors with potentially harmful effect to the F. excelsior population are the accumulation of heavy metals and salinity in soils. Thus, the aim of this study was to investigate the impact of selected biotic and abiotic stress factors to determine which of them pose a threat to European ash. The study was conducted using in vitro techniques based on callus and seedlings regenerated via indirect organogenesis. Tissue cultures exclude the influence of other factors, including the environmental impact on ash extinction. The results confirmed very strong pathogenic potential of H. fraxineus in which after 14 days the callus tissue cells died as the tissue failed to activate its defense mechanisms. Experiments showed the high toxicity of cadmium in concentration of 0.027 mmol/L. Salinity caused the activity of oxidation enzymes to vary among seedlings and calluses in the control suggesting the enzymes play a role in controlling the morphogenetic development of tissue cultures.

scholarly journals An Insight into the Abiotic Stress Responses of Cultivated Beets (Beta vulgaris L.)

Plants ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 12
Author(s):  
Seher Yolcu ◽  
Hemasundar Alavilli ◽  
Pushpalatha Ganesh ◽  
Muhammad Asif ◽  
Manu Kumar ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Abiotic Stress ◽  
Beta Vulgaris ◽  
Stress Responses ◽  
Abiotic Stresses ◽  
Animal Feed ◽  
Growth Yield ◽  
Growth Period ◽  
Stress Factors ◽  
Abiotic Stress Factors

Cultivated beets (sugar beets, fodder beets, leaf beets, and garden beets) belonging to the species Beta vulgaris L. are important sources for many products such as sugar, bioethanol, animal feed, human nutrition, pulp residue, pectin extract, and molasses. Beta maritima L. (sea beet or wild beet) is a halophytic wild ancestor of all cultivated beets. With a requirement of less water and having shorter growth period than sugarcane, cultivated beets are preferentially spreading from temperate regions to subtropical countries. The beet cultivars display tolerance to several abiotic stresses such as salt, drought, cold, heat, and heavy metals. However, many environmental factors adversely influence growth, yield, and quality of beets. Hence, selection of stress-tolerant beet varieties and knowledge on the response mechanisms of beet cultivars to different abiotic stress factors are most required. The present review discusses morpho-physiological, biochemical, and molecular responses of cultivated beets (B. vulgaris L.) to different abiotic stresses including alkaline, cold, heat, heavy metals, and UV radiation. Additionally, we describe the beet genes reported for their involvement in response to these stress conditions.

scholarly journals Jute Responses and Tolerance to Abiotic Stress: Mechanisms and Approaches

Plants ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1595
Author(s):  
Khussboo Rahman ◽  
Naznin Ahmed ◽  
Md. Rakib Hossain Raihan ◽  
Farzana Nowroz ◽  
Faria Jannat ◽  
...  
Keyword(s):  
Abiotic Stress ◽  
Stress Responses ◽  
Growth Yield ◽  
Climatic Conditions ◽  
Stress Factors ◽  
Growth Physiology ◽  
Abiotic Stress Factors ◽  
Hot And Humid Climates ◽  
Adverse Environmental Conditions ◽  
Cold Metal

Jute (Corchorus spp.) belongs to the Malvaceae family, and there are two species of jute, C. capsularis and C. olitorious. It is the second-largest natural bast fiber in the world according to production, which has diverse uses not only as a fiber but also as multiple industrial materials. Because of climate change, plants experience various stressors such as salt, drought, heat, cold, metal/metalloid toxicity, and flooding. Although jute is particularly adapted to grow in hot and humid climates, it is grown under a wide variety of climatic conditions and is relatively tolerant to some environmental adversities. However, abiotic stress often restricts its growth, yield, and quality significantly. Abiotic stress negatively affects the metabolic activities, growth, physiology, and fiber yield of jute. One of the major consequences of abiotic stress on the jute plant is the generation of reactive oxygen species, which lead to oxidative stress that damages its cellular organelles and biomolecules. However, jute’s responses to abiotic stress mainly depend on the plant’s age and type and duration of stress. Therefore, understanding the abiotic stress responses and the tolerance mechanism would help plant biologists and agronomists in developing climate-smart jute varieties and suitable cultivation packages for adverse environmental conditions. In this review, we summarized the best possible recent literature on the plant abiotic stress factors and their influence on jute plants. We described the possible approaches for stress tolerance mechanisms based on the available literature.

Performance of plant growth-promoting bacterium of duckweed under different kinds of abiotic stress factors

2019 ◽  
Vol 19 ◽  
pp. 101146 ◽  
Author(s):  
Hidehiro Ishizawa ◽  
Minami Tada ◽  
Masashi Kuroda ◽  
Daisuke Inoue ◽  
Michihiko Ike
Keyword(s):  
Abiotic Stress ◽  
Plant Growth ◽  
Stress Factors ◽  
Abiotic Stress Factors ◽  
Plant Growth Promoting ◽  
Growth Promoting
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