Plant lignin content altered by soil microbial community

Abstract

Summary Questions have been raised in various fields of research about the consequences of plants with modified lignin production. As a result of their roles in nutrient cycling and plant diversity, plant–soil interactions should be a major focus of ecological studies on lignin‐modified plants. However, most studies have been decomposition studies conducted in a single soil or in sterile soil. Thus, we understand little about plant–soil interactions in living lignin‐modified plants. In lignin mutants of three different barley (Hordeum vulgare) cultivars and their corresponding wild‐types associated with three different soil microbial communities, we asked: do plant–soil microbiome interactions influence the lignin content of plants?; does a mutation in lignin production alter the outcome of plant–soil microbiome interactions?; does the outcome of plant–soil microbiome interactions depend on host genotype or the presence of a mutation altering lignin production? In roots, the soil community explained 6% of the variation in lignin content, but, in shoots, the soil community explained 21% of the variation in lignin content and was the only factor influencing lignin content. Neither genotype nor mutations in lignin production explained associations with fungi. Lignin content changes in response to a plant's soil microbial community, and may be a defensive response to particular components of the soil community.

Trichoderma mediate early and enhanced lignifications in chickpea during Fusarium oxysporum f. sp. ciceris infection

“…Previous studies showed that the structural lignin is different from the defense lignin . In the present study, lesser plant mortality in the plants where the positive correlation was seen between higher expression of the selected genes and higher lignifications may therefore be attributed to contribution of both structural and defense lignin.…”

“…The reason behind cross section examination of stem sections was that it presents a very clear evidence of lignin deposition compared to the root tissues. It has been reported earlier that compared to 6% lignifications in roots, 21% lignifications takes place in shoots . Therefore, examination of lignifications in shoots provides a better idea on activation of the lignin biosynthetic pathway.…”

Bacillus amyloliquefaciens alters gene expression, ROS production and lignin synthesis in cotton seedling roots

“…Furthermore, soil microbial communities altered overall lignin content in barley (Bennett et al . ). Increased lignin content may be directly linked to the enhanced expression of antioxidant peroxidase enzymes in cotton seedling roots.…”

“…Altered lignin synthesis as a result of endophytic colonization was also documented in shoots of Zea mays (Yates et al 1997). Furthermore, soil microbial communities altered overall lignin content in barley (Bennett et al 2015). Increased lignin content may be directly linked to the enhanced expression of antioxidant peroxidase enzymes in cotton seedling roots.…”

Polyphenol Content and Enhancing Plant resistance of Lowland Arabica Coffee

“…In the plant cell walls, lignin is a polymer compound from the series of phenol groups. According to [6] lignin can limiting the fungal infection. Figure 3 shows the amount of lignin in leaf tissue samples of lowland arabica coffee plants.…”