Sufficient potassium supply enhances tolerance of potato plants to PEG-induced osmotic stress

Wilmer, Lisanne; Tränkner, Merle; Pawelzik, Elke; Naumann, Marcel

doi:10.1016/j.stress.2022.100102

Cited by 7 publications

(2 citation statements)

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“…Soluble sugars serve as regulators of gene expression and as signal molecules (Rosa et al, 2009; Tarkowski & Van den Ende, 2015). In the Wilmer et al (2022) study, plants treated with PEG‐induced osmotic stress produced more sugars compared to plants without PEG. Moreover, compared to the roots, more sugars were accumulated in the shoots, which could indicate an inhibited sugar transportation.…”

Section: Discussionmentioning

confidence: 98%

“…Soluble sugars serve as regulators of gene expression and as signal molecules (Rosa et al, 2009;Tarkowski & Van den Ende, 2015). In the Wilmer et al (2022) and drought-susceptible Longyan, slightly increased during the first 7 days of PEG treatment. Moreover, the soluble sugar content in DA92-2F6 leaves was significantly higher than that in the leaves of Longyan (Gong et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

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The involvement of metallothioneins and stress markers in response to osmotic stress in Avena sativa L.

Konieczna

Mierek‐Adamska

Warchoł

et al. 2023

J Agronomy Crop Science

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Osmotic stress frequently caused by drought is the most threatening environmental stress that remarkably reduces crop yield. Oat (Avena sativa L.) is sensitive to water deficiency during growth. Plant metallothioneins (pMTs) show tremendous promise in enhancing general stress tolerance in plants. This study aimed to verify whether pMTs and elements of the antioxidant defence system protect oat against osmotic stress.Coding and genomic regions of A. sativa L. MTs belonging to three different types were cloned. To evaluate the role of MTs in osmotic stress, the expression of genes encoding AsMT1-3 was checked by qRT-PCR in the roots and shoots of oat plants growing in a hydroponic culture in the presence of polyethylene glycol (PEG 6000) and mannitol. The expression of AsMT1-3 changed in response to osmotic stress; however, the changes depended on the type of MT and the treatment. The amount of AsMT3 transcript was about five-fold and nine-fold higher in shoots and roots, respectively, in the presence of mannitol. To further analyse the response of oat to osmotic stress, the level of phenolic compounds, soluble sugars, abscisic acid, and the activity of antioxidant enzymes were tested using spectrophotometric and chromatographic methods. During osmotic stress, the content of phenols, soluble sugars, abscisic acid, and the activity of catalase and peroxidase in shoots increased. In roots treated with PEG 6000, the amount of phenolic compounds was higher than that in roots treated with mannitol. The activity of superoxide dismutase was about 5-fold higher in roots than in shoots. MTs are involved in plant response to osmotic stress. In the future, insight provided in this study will lead to application in agriculture either by using MTs as molecular markers for stress-resistant crop cultivars or by a generation of genetically modified crops overexpressing MTs.

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Section: Discussionmentioning

confidence: 98%