Bacillus thuringiensis and Silicon Modulate Antioxidant Metabolism and Improve the Physiological Traits to Confer Salt Tolerance in Lettuce

We investigated the impact of Bacillus thuringiensis as seed treatment and application with silicon on lettuce plants exposed to salinity levels (4 dS m−1 and 8 dS m−1). Results revealed that leaves number, head weight, total yield, relative water content (RWC), and chlorophyll a and b declined cons...

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Bibliographic Details
Published in:Plants (Basel) 2021-05, Vol.10 (5), p.1025
Main Authors: ALKahtani, Muneera, Hafez, Yaser, Attia, Kotb, Al-Ateeq, Talal, Ali, Mohamed A. M., Hasanuzzaman, Mirza, Abdelaal, Khaled
Format: Article
Language:English
Subjects:
Agricultural production
antioxidant enzymes activity
Antioxidants
Bacillus
Bacillus thuringiensis
Catalase
Chlorophyll
Electrolytes
Hydrogen peroxide
Leaves
Lettuce
Lipid peroxidation
Lipids
Moisture content
Oxidative stress
Peroxidase
Peroxidation
Physiology
Polyphenol oxidase
Proline
Salinity
Salinity effects
Salinity tolerance
Salt
salt stress
Salt tolerance
Seed treatments
Silicon
Superoxide dismutase
Vegetables
Water content
Weight
yield
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Summary:We investigated the impact of Bacillus thuringiensis as seed treatment and application with silicon on lettuce plants exposed to salinity levels (4 dS m−1 and 8 dS m−1). Results revealed that leaves number, head weight, total yield, relative water content (RWC), and chlorophyll a and b declined considerably due to two salinity levels. Oxidative stress markers, i.e., hydrogen peroxide (H2O2), superoxide (O2−), and lipid peroxidation (MDA) dramatically augmented in stressed plants. On the other hand, leaves number, total yield, RWC, and chlorophyll a, b in stressed lettuce plants were considerably enhanced because of the application of Si or B. thuringiensis. In contrast, EL%, MDA, and H2O2 were considerably reduced in treated lettuce plants with Si and B. thuringiensis. In addition, the treatment with Si and B. thuringiensis increased head weight (g) and total yield (ton hectare-1), and caused up-regulation of proline and catalase, superoxide dismutase, peroxidase, and polyphenol oxidase activity in lettuce leaves under salinity conditions.
ISSN:2223-7747
2223-7747
DOI:10.3390/plants10051025