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Physiological and molecular mechanisms governing the effect of virus-free chewing cane seedlings on yield and quality
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Physiological and molecular mechanisms governing the effect of virus-free chewing cane seedlings on yield and quality
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Journal Article
Physiological and molecular mechanisms governing the effect of virus-free chewing cane seedlings on yield and quality
2020
Overview
The effects of increasing yield and quality of virus-free chewing cane seedlings and their physiological and molecular basis were studied in this study. Results showed that compared with infected seedlings (the control), the yield of chewing cane stems grown from virus-free seedlings increased by 21.81–29.93%, stem length increased by 28.66–34.49 cm, internode length increased by 2.16–2.68 cm, the single stem weight increased by 20.10–27.68%, the reducing sugar increased by 0.91–1.15% (absolute value), and sucrose increased by − 0.06–1.33% (absolute value). The decrease in sucrose content did not reach significant level, but all other parameters were reached significant level. The chlorophyll content, photosynthetic parameters such as stomatal conductance (Gs), net photosynthetic rate (Pn) and transpiration rate (Tr), the activity of photosynthetic key enzymes ribulose-1,5-bisphosphate carboxylase (Rubisco) and phosphoenolpyruvate carboxylase (PEPC), and gene (
pepc
,
rbcS,
and
rbcL
) expression levels were all greater in virus-free seedlings than infected seedlings. The content of superoxide anion (O
2
−
) and malondialdehyde (MDA) in virus-free seedlings was lower than infected seedlings at the main growth stage. With increased development, the activities of the antioxidant enzymes superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) were gradually higher in virus-free seedlings than infected seedlings. Our results indicate that virus-free seedlings may improve photosynthesis efficiency and promote photosynthesis by increasing chlorophyll content, photosynthetic key enzyme activity, and the gene expression levels in leaves. By increasing the activity of antioxidant enzymes, reducing the degree of membrane lipid peroxidation, and improving the stress resistance of chewing cane, the virus-free chewing cane seedlings increased yield and quality. Our findings provide a scientific and theoretical basis for the promotion and application of virus-free chewing cane seedlings.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
/ Catalase
/ Chewing
/ Enzymes
/ Host-Pathogen Interactions - physiology
/ Humanities and Social Sciences
/ Membrane Lipids - metabolism
/ Mosaic Viruses - pathogenicity
/ Phosphoenolpyruvate carboxylase
/ Ribulose-bisphosphate carboxylase
/ Science
/ Seedlings - growth & development
/ Stomata
/ Sucrose
