rhododendron ovatum/atrophy

The evolution of photosynthesis is an important feature of mixotrophic plants. Previous inferences proposed that mixotrophic taxa tend to retain most genes relating to photosynthetic functions but vary in plastid gene content. However, no sequence data are available to test this hypothesis in

OBJECTIVE Evolutionary and ecological roles of the chloroplast small heat shock protein (CPsHSP) have been emphasized based on variations in protein contents; however, DNA sequence variations related to the evolutionary and ecological roles of this gene have not been investigated. In the present

Phytophthora ramorum has been recently described (4) from isolates collected since approximately 1993, from Rhododendron and Viburnum in the Netherlands and Germany. Since 2001 and 2002, respectively, there have been unconfirmed reports from Poland and Great Britain (1). There are growing concerns

In Rhododendron spp. and Ledum groenlandicum a callose wall is laid down around the zygote in the first 2 days after fertilization. The periodic acid/Schiff-positive, aniline blue-fluorescence-positive callosic wall is initiated adjacent to the degenerating synergid, extends to cover the entire