Terpenoids, the largest secondary metabolic family irreplaceable in inner communication with: environment; plant growth; and development [ 16- 18], are regulated by AP2/ERF, bHLH and MYB members [ 19].
They are sensitive to changes of environment by playing an irreplaceable role in maintaining soil ecological structure, keeping the balance of soil nutrients and protecting moisture and fertilizer (Bian 2005; Wang et al. 2006; Lin et al. 2010).
The important and irreplaceable cultural functions which are performed by natural environment are rarely investigated.
Many of the services the environment provides, like clean water and air, are irreplaceable necessities, they point out.
The unique properties of the microdomain make it irreplaceable in many applications, e.g. for mimicking the in vivo environment [ 4] or for achieving high-resolution separations in capillary electrophoresis because of the flat velocity profile of electroosmotic flow [ 5].
Furthermore, because of the combination of its unique electronic and thermal properties, diamond plays a vital or somewhat irreplaceable role in some special applications, such as in abominable environments and military fields.
The effective disinfection of contaminated environments, soil, feces, and animal bodies plays an irreplaceable role in the prevention and control of brucellosis.
It has an irreplaceable position in the process of social production and can maintain the ecological environment (Lu 2010).
