With improved microscope and preparation techniques, studies of histo- logical structures of plant organisms experienced a revival of interest at the end of the 19th century.
Wood is formed in an essentially water-saturated environment in the living tree, and the cell wall remains in this state until the water flow from the roots is interrupted, such as by felling the tree.
It is widely recognized that spiral grain in trees severely reduces the value of sawn timber through warping and loss of strength, and that it also causes problems for other wood uses as diverse as transmission poles or plywood.
Mit der wissenschaftlichen Erschließung der tropischen Hochgebirge hat sich auch das Interesse der Botaniker aller Disziplinen, Morphologen, Systematiker, Pflanzengeographen, Pflanzenphysiologen der dortigen, z.
Von der Arbeits gruppe Systemforschung an der Universität Osnabrück wird im Auftrag der International Union of Biologica1 Sciences (IUBS) ein Projekt zur Erstellung von sogenannten Element-Konzentrations Katastern in Ökosystemen (ECCE) entwickelt, das alle großen Ökosysteme der Erde einschließen soll.
It is apparent that wilt diseases continue to be a major problem in crop production because of the number of crops affected, the number and genetic variability of pathogens involved, and their widespread occurrence throughout tropical and temperate regions under a variety of cropping systems.
In recent years, tropical forests have received more attention and have been the subject of greater environmental concern than any other kind of vegetation.
Genetic constraints on adaptive evolution can be understood as those genetic aspects that prevent or reduce the potential for natural selection to result in the most direct ascent of the mean phenotype to an optimum.
Low temperature represents, together with drought and salt stress, one of the most important environmental constraints limiting the pro- ductivity and the distribution of plants on the Earth.
This volume comprises the lectures of the speakers at the NATO Advanced Research Workshop held at the Congress Centre The Flevohof at Biddinghuizen, The Netherlands, May 11-16, 1986.
"e;Instead of dirt and poison we have rather chosen to fill our hives with honey and wax; thus furnisning mankind with the two noblest of things, which are sweetness and light"e;.
By the end of the last century, the only region in all of Europe where the natural vegetation remained untouched over large expanses was Eastern Europe.
The Plant Root and the Rhizosphere was a major topical feature of the first International Symposium on Factors Determining the Behavior of Plant Pathogens in Soil held at the University of California, Berkeley in 1963.
Biotechnology has come to a stage where, by replacing some of the age- old practices of breeding, it can produce novel and improved plants and animals that can better serve human beings and their purposes.
The NATO Advanced Study Institute on Numerical Taxonomy took place on the 4th - 16th of July, 1982, at the Kur- und Kongresshotel Residenz in Bad Windsheim, Federal Republic of Germany.
