Question

which chemical is deposited on the cell wall of schlerenchyma

Answer 1

lignin is the answer

Answer 2

Lignin is deposited on the cell wall of schlerenchyma
There are three basic plant cell types, parenchyma, collenchyma, and sclerenchyma cells. Sclerenchyma cells are the strongest of the three and this is a result of the cell a second cell wall which is hardened by lignin, making these cells very durable and tough. The lignin however besides making the cells as tough as they are also make them just as rigid. This difference from collenchyma cells results in the sclerenchyma cells being unable to grow with a plant. Therefore, the sclerenchyma cells are found only in the parts of the plant which aren't lengthening anymore. \n. \nNumerous amounts of sclerenchyma cells, die when they reach maturity, such as the sclerenchyma cells that are found within the vascular system. The cytoplasm and the organelles of these dead cells disintegrate, however, since the sclerenchyma cells contain lignin in their second cell wall, they are rigid, as mentioned before, so when the disintegration is over, the rigid cell walls remain and provide a sort of skeletal support for the water-conducting tissue or in some cases the plant itself. \n. \nSclerenchyma cells actually form a major part of fruit pits and also the hard outer shell of nuts. These cells can also be found in stems and leaf veins and, the sclerenchyma cells are responsible for the gritty texture of pears. Humans use sclerenchyma cells fibers, not the actual cell, to make linen and rope.\n. \nSo furthermore, sclerenchyma cells are quite special for the basic plant cell they are.