Seed priming for alleviation of heavy metal toxicity in plants: An overview

Abstract

<jats:p>Heavy metal (HM) toxicity is vital environmental constraint that limits crop productivity worldwide. Several physiological processes necessary for plant survival have been found to be affected by HM toxicity. In recent farming, advanced mechanisms are being developed to overcome from the stresses to enhance the yield. The seed priming is an affordable method for plants to survive under abiotic and biotic stresses. Priming is useful for commercial seed lots by seed technologists to increase the vigor of the seeds in terms of germination potential and enhance the tolerance against various stresses. It also removes the pollution threats by minimizing the uses of chemical fertilizers. The seeds having deprived of quality in terms of seed germination and seedling characters ultimately affect the growth, photosynthetic performance and yield of the plants under HM stress. On the other hand seed primed with various seed priming methods such as hydropriming, hormonal priming, chemical priming, biopriming, magnetopriming and nanopriming perform well under HM toxicity. Seed priming methods have been considered as a unique approach to get rid of HM stress by enhancing the seed germination, seedling vigor, rate of photosynthesis, biomass accumulation and thus increase the crop productivity. The present review provides an overview of different seed-priming methods and their role in alleviation of adverse effects of HM stress in plants.</jats:p>

Stimulating Role of Calcium and Cyclic GMP in Mediating the Effect of Magnetopriming for Alleviation of Salt Stress in Soybean Seedlings

“…Plants are able to recognize stimuli and recourse in response to different abiotic environmental stresses by activating defense mechanisms. Various pre-sowing treatments such as magnetopriming which is a non-invasive technique in which dry seeds are treated with a static magnetic field (SMF), improved the seed vigour and germination under various abiotic stress conditions [8][9][10][11]. The positive impact of SMF and enrichment of seed germination due to magnetic field (MF) exposure has been observed by various researchers in different crops such as peach (Prunus persica) [12], chickpea (Cicer arietinum) [13], cucumber (Cucumis sativus) [14], lettuce (Lactuca sativa) [15], corn (Zea mays) [16], tomato (Solanum lycopersicum) [17], radish (Raphanus sativus) [18], soybean (Glycine max), and maize (Zea Seeds 2023, 2 mays) [19].…”

Magnetopriming Actuates Nitric Oxide Synthesis to Regulate Phytohormones for Improving Germination of Soybean Seeds under Salt Stress

“…Hence, it becomes pertinent to examine the potential of seed enhancement techniques in lowering the risk involved in achieving a reasonably good plant population under the stressed environment. Seed priming is a technique to stimulate seed metabolic processes during germination and improve their performance under diverse environmental conditions [ 7 , 8 ]. Magnetopriming is a non-invasive dry seed priming treatment that has been widely used to enhance seedling vigor and plant growth under various environmental cues [ 9 , 10 , 11 , 12 , 13 ].…”

Mercimekte Çimlenme ve Fide Gelişimi Üzerine Optimum PGPB- Priming Protokolünün Belirlenmesi

“…However, lentil cultivation is generally designed as a dry farming system, therefore, high yield losses occur many times due to drought stress. Although many different methods have been tried to mitigate environmental stress, not only for drought and the other stress factors like salinity, extreme temperatures, nutrient deficiency, etc., seed priming and plant growth promoting bacteria (PGPB) applications have started up due to their sustainable, eco-friendly and cost-effective properties for last decades [2,3]. Indeed, the seed priming technique is based on the exposure of seeds to lower external water potential [5].…”