Beauty Farming Life

  Terminology *Seed coat : A layer by which a seed is covered. *Kernel: Without seed coat, the rest part of seed is combinedly called kernel. *Testa : Outer layer of seed coat. *Tegmen: Inner layer of seed coat. *Endosperm : It is the storage food materials of seed which is situated outside the cotyledons. *Epicotyle : A part of the embryo, which produces seed or the above ground part of the plant. *Coleoptile : The first leaf above the cotyledons which encloses the stem tip and other part of the plant. *Hilum : A depressed mark or scar from where the seed was attached directly with placenta in legumino pods. *Mesocotyle : In some monocotyledonous plant like wheat, rice etc. the part of the seedlings stems below the shoot gets elongated which is called Mesocotyle. *Radicle : Post primordial in the embryo of a seed. *Plumule : The major young bud of the embryo within a seed or seedling from which the aerial portion of the plant will develop. *Cotyledo...

Question Bank of Crop Botany (204) (1) Ecology: (a) Define ecology. (14) (b) Briefly describe different types of ecology. (14)                          (2) Ecological factors: (a) Classify ecological factors. (14) (c) Describe how topographic factor affect crop growth and development. (14)                                                                                                  ...

B.Sc.Ag. (Hons) Part-I     Secondary Thickening of the Cell-wall. https://cststudy.blogspot.com Secondary Thickening of the Cell-wall Secondary thickening of the cell-wall may be more or less uniform all-round the cell and almost always has a stratified appearance. But in those cells which have to ultimately grow into vessels and tracheids, it may be localized to particular portions of the wail, forming in special patterns. In these cases, it is due to the deposit of a chemically complex and hard sub-stance, called lignin, in the meshes of the cellulose network. Such thickening takes place only after the aforesaid elements have grown and attained their full dimensions. The thickening being localized, a portion of the wall may remain unthickened. The patterns of thickening may be as follows (1) Annular or ring-like (A )-----when the deposit of lignin is in the form of rings, which are placed one a little above the other in the interior of the ori...