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The Exogenous Application of 24‑Epibrassinolide (24‑EBL) Increases the Cd and Pb Resilience in Zea mays (L.) by Regulating the Growth and Physiological Mechanism

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Title The Exogenous Application of 24‑Epibrassinolide (24‑EBL) Increases the Cd and Pb Resilience in Zea mays (L.) by Regulating the Growth and Physiological Mechanism
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Creator Zaryab Shaf1 · Mohammad Shahid1 · Amal Mohamed AlGarawi2 · Mohammad Tarique Zeyad3 · Samy A. Marey4 · Ashraf Atef Hatamleh2 · Shifa Wang5 · Udai B. Singh
 
Subject Cd and Pb toxicity · Zea mays (L.) · Phytohormones · 24-Epibrassinolide (EBL) · Growth and physiology · Antioxidant enzyme
 
Description Not Available
eavy metals (HMs) at a concentration above the threshold level act as environmental pol lutants and very often threaten the agricultural productivity globally. Finding afordable and
environmentally sustainable deliverables to address this issue is therefore a top focus. Phy tohormones alleviate the HMs-induced toxicity and positively infuence the plant growth.
Considering the importance of phytohormones, the present study aimed to assess the efect
of 24-epibrassinolide (24-EBL; 10 µM) as seed soaking treatment on growth performance of
Zea mays (L.) contaminated separately with increasing concentrations (50–400 mg.kg−1) of
lead (Pb) and cadmium (Cd). With increasing metal concentrations, growth and plant biom etric criteria were reduced. For instance, Cd at 400 mg.kg−1 soil reduced the germination ef ciency (56%), root (77%) and shoot (69%) dry weight, total chlorophyll (64%), and carotenoid
content (45%). Contrarily, both HMs caused increase in stress biomarkers and antioxidant
enzymes in seedling. However, exogenous administration of 24-EBL signifcantly enhanced
the growth attributes, photosynthetic pigments, proline, MDA, and antioxidant enzyme activ ity while reducing the harmful efects of HMs stress on Z. mays. For instance, 24-EBL (10
µM) improved the germination percentage, root biomass, chl a, chl b, total chlorophyll, and
carotenoid content by 16, 21, 17, 34, 18, and 15%, respectively, in 50 mg.Pb.kg−1 soil-treated
Z. mays plants. Furthermore, the amounts of proline, MDA, and antioxidant enzymes in foli age of Z. mays were interestingly and dramatically lowered by 24-EBL application. Uptake
of metals in plant organs was signifcantly reduced when 24-EBL was applied to Pb- and Cd treated Z. mays. The recent fndings help us better understand how 24-EBL regulates growth
and development of Z. mays as well as how it boosts HMs’ resilience, which could increase the
possibility of employing 24-EBL to increase Z. mays productivity. Thus, the present fndings
confrmed the potentiality of pre-soaking the seed in 24-EBL solution that neutralizes the toxic
efects of heavy metals in Z. mays plants. Therefore, it is suggested that applying phytohor mones including 24-EBL in removal of heavy metal stress in plants is the best possible solu tion in sustainable agriculture.
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Date 2024-06-24T16:47:22Z
2024-06-24T16:47:22Z
2023-01-01
 
Type Research Paper
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/83755
 
Language English
 
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Publisher Not Available