Role of inorganic bio stimulant elements in plant growth

Ayub, Muhammad Ashar; Abbas, Misbah; Rehman, Muhammad Zia ur

doi:10.1016/b978-0-443-18675-2.00014-6

Cited by 2 publications

(2 citation statements)

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“…However, Sb increased the activity of antioxidant enzymes, which confirmed that Sb induces oxidative stress. The biostimulants of various chemical and biological compositions (including organic and inorganic compounds) were tested to elucidate their potential to alleviate the impact of heavy metal stress on plants [ 30 , 34 ]. The tested organic biostimulants are different types of phytohormones such as auxins, cytokinins, abscisic acid, and gibberellins [ 30 ], while Si, Se, Co, and Al are commonly investigated inorganic stimulants [ 34 ].…”

Section: Discussionmentioning

confidence: 99%

“…The biostimulants of various chemical and biological compositions (including organic and inorganic compounds) were tested to elucidate their potential to alleviate the impact of heavy metal stress on plants [ 30 , 34 ]. The tested organic biostimulants are different types of phytohormones such as auxins, cytokinins, abscisic acid, and gibberellins [ 30 ], while Si, Se, Co, and Al are commonly investigated inorganic stimulants [ 34 ]. It is very important to mention that the positive effects of all biostimulants depend on the concentration used.…”

Section: Discussionmentioning

confidence: 99%

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Silicon Actuates Poplar Calli Tolerance after Longer Exposure to Antimony

Labancová

Vivodová

Šípošová

et al. 2023

Plants

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The presence of antimony (Sb) in high concentrations in the environment is recognized as an emerging problem worldwide. The toxicity of Sb in plant tissues is known; however, new methods of plant tolerance improvement must be addressed. Here, poplar callus (Populus alba L. var. pyramidallis) exposed to Sb(III) in 0.2 mM concentration and/or to silicon (Si) in 5 mM concentration was cultivated in vitro to determine the impact of Sb/Si interaction in the tissue. The Sb and Si uptake, growth, the activity of superoxide dismutase (SOD), catalase (CAT), guaiacol-peroxidase (G-POX), nutrient concentrations, and the concentrations of photosynthetic pigments were investigated. To elucidate the action of Si during the Sb-induced stress, the impact of short and long cultivations was determined. Silicon decreased the accumulation of Sb in the calli, regardless of the length of the cultivation (by approx. 34%). Antimony lowered the callus biomass (by approx. 37%) and decreased the concentrations of photosynthetic pigments (up to 78.5%) and nutrients in the tissue (up to 21.7%). Silicon supported the plant tolerance to Sb via the modification of antioxidant enzyme activity, which resulted in higher biomass production (increased by approx. 35%) and a higher uptake of nutrients from the media (increased by approx. 10%). Silicon aided the development of Sb-tolerance over the longer cultivation period. These results are key in understanding the action of Si-developed tolerance against metalloids.

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