In this article we will discuss about the types of abiotic stress. Extreme environmental conditions such as drought, salinity and freezing temperature cause adverse effect on the growth and productivity of crop plants. The temperature (heat, chilling and freezing), drought and salinity stress together represent abiotic stress. Exposure of plants in general to these abiotic stresses is inevitable in nature [...]
In this article we will discuss about the physiology of cold stress on plants. Plants produce number of proteins in response to cold and freezing temperature. More than 54 cold-inducible genes have been identified using cDNA microarray technology. In the process of various stress inducible gene expression, nearly 10% of the drought inducible genes are also induced by cold-stress indicating [...]
In this article we will discuss about the organization of Ti Plasmid. Agrobacterium tumeifaciens harbours a large circular DNA known as Ti plasmid, which exists as an independent extra chromosomal entity of 200 kb size. The most spectacular regions of Ti plasmid are the presence of T (transfer) DNA and vir regions. Other components are origin of replication and regions [...]