Plants coordinate their development using long-distance signaling. The vascular system provides a route for long-distance movement, and specifically the xylem for root-to-shoot signaling. Root-to-shoot signals play roles communicating soil conditions, and these signals are important for agricultural water conservation. Using genetic approaches, the Arabidopsis bypass1 (bps1) mutant, which over-...

P lants (land plants, embryophytes) are of monophyletic origin from a freshwater ancestor that, if still extant, would be classified among the charophycean green algae. Plants, but not charophyceans, possess a life history involving alternation of two morphologically distinct developmentally associated bodies, sporophyte and gametophyte. Body plan evolution in plants has involved fundamental ch...

To be extended as 1648000 Km2, Iran has a widely varied climate; it is a habitat for very different plant species. Nearly 190 families of vascular plants are found in this country, totally containing 8500- 9500 species, the endemic plants being relatively numerous. Considering the inevitable importance of plants identification, a complete index of the endemic species of Phanerogams in Iran is l...

To be extended as 1648000 Km2, Iran has a widely varied climate; it is a habitat for very different plant species. Nearly 190 families of vascular plants are found in this country, totally containing 8500- 9500 species, the endemic plants being relatively numerous. Considering the inevitable importance of plants identification, a complete index of the endemic species of Phanerogams in Iran is l...