Journal
PLANT PHYSIOLOGY AND BIOCHEMISTRY
Volume 166, Issue -, Pages 582-592Publisher
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.plaphy.2021.06.032
Keywords
Antioxidants; Chlorophyll content; Fv/Fm; Limited irrigation; Photosynthetic leaf gas exchange; Saccharum spp.; Silicon
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Funding
- Guangxi R and D Program Fund [GK17195100]
- Fund for Guangxi Innovation Teams of Modern Agriculture Technology [gjnytxgxcxtd-03-01]
- Fund of Guangxi Academy of Agricultural Sciences [2021YT011]
- Youth Program of National Natural Science Foundation of China [31901594]
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The study shows that foliar spray of silicon can alleviate the adverse effects of limited water irrigation on sugarcane plants, enhancing antioxidative defense mechanisms and improving plant performance.
Plant cell and water relationship regulates morphological, physiological and biochemical characteristics to optimize carboxylation for enhanced biomass yield in sugarcane. Insufficient water irrigation is one of the serious problems to impair potential yield of agriculturally important sugarcane cash crop by loss in plant performance. Our study aims to reveal consequences of foliar spray of silicon (Si) using calcium metasilicate powder (Wollastonite, CaO center dot SiO2) to alleviate the adverse effects of limited water irrigation in sugarcane. Silicon (0, 50, 100 and 500 ppm) was applied as foliar spray on normally grown 45 days old sugarcane plants. Further, these plants were raised at half field capacity (50%) using water irrigation precisely up to 90 days under open environmental variables. Consequently, restricted irrigation impaired plant growth-development, leaf relative water content (%), photosynthetic pigments, SPAD unit, photosynthetic performance, chlorophyll fluorescence variable yield (Fv/Fm) and biomass yield. Notably, it has enhanced values of proline, hydrogen peroxide (H2O2), malondialdehyde (MDA), antioxidative defense enzyme molecules viz., catalase (CAT), ascorbate peroxidase (APx) and superoxide dismutase (SOD). The foliar spray of Si defended sugarcane plants from limited water irrigation stress as Si quenched harmful effect of water-deficit and also enhanced the operation of antioxidant defense machinery for improved sugarcane plant performance suitably favored stomatal dynamics for photosynthesis and plant productivity.
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