Plant tolerance to heat stress proved to be entirely dependent on the signaling flow of information by which the plant can sense the changes in its surrounding environment and signal its genes to respond by producing special proteins to protect it-self. Any changes or manipulations in this signaling flow of information will presumably lead to a modification in the genetic expression inside the plant cells, consequently, changing plant performance. Understanding these signaling events in response to heat may help us to produce heat tolerant plants capable to stand high temperature stress. In...

Twelve mango cultivars grown in the Egypt were discriminated by their seed SDS-protein and PCR- based molecular markers. For PCR analysis three different techniquess were used including novel technique. Comparitive analysis were conductied beween the two old technique, ISSR and RAPD, and the novel tecnique, three primers-based RAPD. The cultivar- specific markers represented 24.46%of the total markers (regardless of type of analysis), 88.89% of them were RAPD markers. Most of these markers were scored for the presence of unique bands. Cultivar- specific markers were shown to be useful in...

Large-scale sequencing of different genomes has produced an unprecedented wealth of information about the origin, diversity and genomic impact of repetitive sequences, what were once thought to be "junk DNA." Repetitive sequences in complex genomes contain large portions of transposable elements (TEs). The movement and accumulation of TEs represent a major force shaping the genes and genomes of almost all organisms. Through evolution, individual elements from repetitive families acquired diverse biological roles. Recently, autonomous TEs, generally considered as selfish, have been found to...