Soil carbon supplementation: Improvement of root-surrounding soil bacterial communities, sugar and starch content in tobacco (N. tabacum)

Yan S 1 , Ren T 2 , Wan Mahari WA 3 , Feng H 4 , Xu C 5 , Yun F 6 Show all authors , Waiho K 7 , Wei Y 8 , Lam SS 9 , Liu G 10

Affiliations 

  • 1 Tobacco College of Henan Agricultural University, Zhengzhou 450002, China; Henan Biochar Technology Engineering Laboratory, 450002, China; Henan Biochar Engineering Technology Research Center, 450002, China; Staff Development Institute of China National Tobacco Corporation, Zhengzhou 450000, China
  • 2 Tobacco College of Henan Agricultural University, Zhengzhou 450002, China; Henan Biochar Technology Engineering Laboratory, 450002, China; Henan Biochar Engineering Technology Research Center, 450002, China. Electronic address: biochar2018@henau.edu.cn
  • 3 Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
  • 4 Tobacco College of Henan Agricultural University, Zhengzhou 450002, China
  • 5 Nanping Branch, Fujian Tobacco Sciences Research Institute, Nanping 353000, China
  • 6 Tobacco College of Henan Agricultural University, Zhengzhou 450002, China; Henan Biochar Technology Engineering Laboratory, 450002, China
  • 7 Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia; Centre for Chemical Biology, Universiti Sains Malaysia, Minden, 11900 Penang, Malaysia
  • 8 Tobacco College of Henan Agricultural University, Zhengzhou 450002, China; Henan Biochar Technology Engineering Laboratory, 450002, China; Henan Biochar Engineering Technology Research Center, 450002, China
  • 9 Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia; Tobacco College of Henan Agricultural University, Zhengzhou 450002, China. Electronic address: lam@umt.edu.my
  • 10 Tobacco College of Henan Agricultural University, Zhengzhou 450002, China; Henan Biochar Technology Engineering Laboratory, 450002, China; Henan Biochar Engineering Technology Research Center, 450002, China. Electronic address: liugsh1851@163.com
Sci Total Environ, 2021 Aug 24;802:149835.
PMID: 34461468 DOI: 10.1016/j.scitotenv.2021.149835

Abstract

Soil carbon supplementation is known to stimulate plant growth by improving soil fertility and plant nutrient uptake. However, the underlying process and chemical mechanism that could explain the interrelationship between soil carbon supplementation, soil micro-ecology, and the growth and quality of plant remain unclear. In this study, we investigated the influence and mechanism of soil carbon supplementation on the bacterial community, chemical cycling, mineral nutrition absorption, growth and properties of tobacco leaves. The soil carbon supplementation increased amino acid, carbohydrates, chemical energy metabolism, and bacterial richness in the soil. This led to increased content of sugar (23.75%), starch (13.25%), and chlorophyll (10.56%) in tobacco leaves. Linear discriminant analysis revealed 49 key phylotypes and significant increment of some of the Plant Growth-Promoting Rhizobacteria (PGPR) genera (Bacillus, Novosphingobium, Pseudomonas, Sphingomonas) in the rhizosphere, which can influence the tobacco growth. Partial Least Squares Path Modeling (PLS-PM) showed that soil carbon supplementation positively affected the sugar and starch contents in tobacco leaves by possibly altering the photosynthesis pathway towards increasing the aroma of the leaves, thus contributing to enhanced tobacco flavor. These findings are useful for understanding the influence of soil carbon supplementation on bacterial community for improving the yields and quality of tobacco in industrial plantation.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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