Z
Zoolander
Nice Caligreen
I tell y'all it's a conspiracy and the government is behind it!
hey cali hows he double planting action working for you so far?
Yes I have and have fun finding the clone or even buds (not being sarcastic) really if you find it you the man. Have you heard of the Lemon?
heres a thread with some tmv pics....
including 420247's lovely contribution to the tmv discussion
http://www.icmag.com/ic/showthread.php?t=106396&highlight=tmv
Plants
In modern botanical usage a chimera is a plant consisting of two or more genetically distinct kinds of cells. Chimeras can arise either by a mutation in a cell in some part of the plant where cells divide or by bringing together two different plants so that their cells multiply side by side to produce a single individual. They are studied not only because they are interesting freaks or ornamental, but also because they help in the understanding of many of the developmental features of plants that would otherwise be difficult to investigate.
The first type of chimera to be used in this way resulted from grafting. Occasionally a bud forms at the junction of the scion and stock incorporating cells from both, and it sometimes happens that the cells arrange themselves so that shoots derived from the bud will contain cells from both plants forever.
Flowering plants have growing points (apical meristems) where the outer cells are arranged in layers parallel to the surface. This periclinal layering is due to the fact that the outer cells divide only anticlinally, that is, by walls perpendicular to the surface of the growing point. In many plants there are two such tunica layers and, because cell divisions are confined to the anticlinal planes, each layer remains discrete from the other and from the underlying nonlayered tissue called the corpus. The epidermis of leaves, stems, and petals is derived from the outer layer of the growing point. See Apical meristem
With a periclinal chimera it is possible to trace into stems, leaves, and flowers which tissues are derived from each layer in the growing point. For leaves, this can also be done with variegated chimeras where the genetic difference between the cells rests in the plastids resulting from mutation whose effect is to prevent the synthesis of chlorophyll. Tracts of cells whose plastids lack this pigment appear white or yellow. A common form of variegated chimera has leaves with white margins and a green center (see illustration). The white margin is derived from the second layer of the tunica, and the green center is derived from inner cells of the growing point. The white leaf tissue overlies the green in the center of the leaf, but does not mask the green color. Chimeras with green leaf margins and white centers are usually due to a genetically green tunica proliferating abnormally at the leaf margin in an otherwise white leaf.
Variegated Pelargonium , a periclinal chimera whose second tunica layer is genetically white and whose corpus is genetically greenenlarge picture
Variegated Pelargonium, a periclinal chimera whose second tunica layer is genetically white and whose corpus is genetically green
Since the somatic mutation that initiates chimeras would normally occur in a single cell of a growing point or embryo, it often happens that it is propagated into a tract of mutant cells to form a sector of the plant. If the mutation resulted in a failure to form green pigment, the tract would be seen as a white stripe. Such chimeras are called sectorial, but they are normally unstable because there is no mechanism to isolate the mutant sector and, in the flux that occurs in a meristem of growing and dividing cells, one or other of the two sorts of cells takes over its self-perpetuating layer in the growing point. The sectorial chimera therefore becomes nonchimerical or else a periclinal chimera.
However, in one class of chimera an isolating mechanism can stabilize the sectorial arrangement. This propagates stripes of mutant tissue into the shoot, but because the tunica and corpus are discrete from each other, the plant is not fully sectored and is called a mericlinal chimera. Many chimeras of this type have a single tunica layer; those with green and white stripes in the leaves have the mutant cells in sectors of the corpus. They are always plants with leaves in two ranks, and consequently the lateral growth of the growing point occurs by cell expansion only in the plane connecting alternate leaves. This results in the longitudinal divisions of the corpus cells being confined to planes at right angles to the plane containing the leaves. A mutation in one cell therefore can result in a vertical sheet of mutant cells which, in the case of plastid defect, manifests itself as a white stripe in every future leaf.
The growing points of roots may also become chimerical, but in roots there is no mechanism to isolate genetically different tissues as there is in shoots, and so chimeras are unstable.
Since the general acceptance of the existence of organisms with genetically diverse cells, many cultivated plants have been found to be chimeras. Flecks of color often indicate the chimerical nature of such plants. Color changes in potato tubers occur similarly because the plants are periclinal chimeras. See Somatic cell genetics
Summary Differences in the pattern of organization of organisms may lead to different patterns of evolution, genetics and ecology, Plants and animals differ in their fundamental patterns of organization. Plants consist of a series of repeating units that compete with one another, while animals consist of mutually interdependent systems that cannot compete. As a result, plants may be able to take advantage of somatic mutations in ways that are not available to animals. Somatic mutations arising in plants can be inherited by naturally occurring mechanisms of sexual and asexual reproduction. Long life span, large clone size, and the complete regeneration of buds each year may permit an indivdual plant or clone to evolve. Plants may even develop as mosaics of genetic variation. Evolution by individual plants and/or development as mosaics of genetic variation may prevent herbivores from breaking the defenses of their host plants. This evolution may also result in greater ldquofine tuningrdquo to local environments leading to ecotypic variation.