HORTICULTURE

Detailed explanation-1: -In woody plants, secondary stem growth determines plant size, and responds to physiological and environmental signals. The large amount of assimilated carbon is both accumulated and stored in the secondary cell wall of woody plants, mostly as cellulose and lignin (Osakabe et al., 2012).

Detailed explanation-2: -It is one of the most abundant organic polymers on Earth, exceeded only by cellulose. Lignin constitutes 30% of non-fossil organic carbon on Earth, and 20 to 35% of the dry mass of wood. Lignin is present in red algae, which suggest that the common ancestor of plants and red algae also synthesised lignin.

Detailed explanation-3: -Lignin is found in all vascular plants, mostly between the cells, but also within the cells, and in the cell walls. It makes vegetables firm and crunchy, and gives us what we call “fiber” in our food.

Detailed explanation-4: -Lignin is an important organic polymer which is abundant in cell walls of some specific cells. It has many biological functions such as water transport, mechanical support and resistance to various stresses.