Vegetative Organs

Vegetative Organs

 

in plants, parts of the bodies of plant organisms that serve to maintain its individual life. In lower plants, the vegetative body (thallus) is not separated into organs but consists of a single cell (in unicellular algae, lower fungi); of threads formed from one layer of cells (in filamentous algae, mycelium of fungi): or of colonies in the form of plates, globes, and the like. In highly organized algae, the thallus is separated into organs and tissues. In higher plants, the principal vegetative organs are the leaf, the stalk, and the root. The leaf carries out the functions of photosynthesis, gas exchange, and transpiration; the root serves to attach the plant to the substrate and for absorption of water and mineral salts from the soil; the stalk is the organ that connects the root and the leaves. The morphological and anatomical structure of the vegetative organs is adapted to performing their inherent functions. When there is a change in the character of the functions, the vegetative organs undergo corresponding changes (metamorphosis). The vegetative organs also serve for vegetative reproduction.

References in periodicals archive ?
Therefore, high plant densities likely promote the development of vegetative organs before the SS, especially the transfer of nutrients to reproductive organs after the SS, significantly increasing grain yield.
The habit of these species is very peculiar because of their adaptations to the parasitic lifestyle, including greatly reduced, achlorophyllous, vegetative organs, and colorful dense inflorescences with zygomorphic flowers on fleshy stems (Piwowarczyk et al.
Considering the value of switchgrass as a bioenergy and animal feedstock, we mainly focused on vegetative organs in this study.
Distinct repressing modules on the distal region of the SBP2 promoter contribute to its vascular tissuespecific expression in different vegetative organs. Plant Molecular Biology, v.65, n.5, p.603-614, 2007.
Thus, there are data indicating that the management of the relation between source and drain, through changes in planting density and the number of fruits per plant, may have different outcomes on the growth of fruit and vegetative organs compared to vegetables that produce smaller fruits (Duarte et al., 2008; Guimaraes et al., 2008; Silva et al., 2011).
If the stems or roots of perennial plants, by means of mechanical stops, they reproduce by vegetative organs done.
Biomass accumulated in vegetative organs is presumed to be directly proportional to their length increase.
So, the plants concentrate in a gradient of humidity on the littoral zone of water bodies (Scremin-Dias, 1999), being subject to the seasonal variation of water level, reflecting in morphological, structural, anatomic and physiological alterations of vegetative organs. These characteristics were responsible for the success in colonising these still little-known environments (Scremin-Dias, 1999; Scremin-Dias et al., 2011), especially regarding adaptive peculiarities (Scremin-Dias, 2009).
Among the vegetative organs, rhizome had the highest accumulation of [Na.sup.+] and [Cl.sup.-] and the lowest levels of N[O.sub.3.sup.-] and [K.sup.+], followed by roots.
Previous studies with Connaraceae had demonstrated the presence of GTs principally on the floral axes and reproductive organs; only a few species develop these structures on vegetative organs. Forero (1983) and Forero & Costa (2002) reported the presence of GTs on the petal margins, on the surfaces of stamens and styles, and on the endocarp of C.
In addition, the semiquantitative expression of four genes involved in the anthocyanin biosynthetic pathway, including phenylalanine ammonia-lyase (Va-PAL1), chalcone synthase (Va-CHS1), flavanone 3-hydroxylase (Va-F3H1) and dihydroflavonol 4-reductase (Va-DFR1), of the pale-mauve Vanda hybrid showed that all of the genes, except Va-CHS1, were highly expressed in all of the three stages of the florets, whereas Va-F3H1 was rarely expressed in the vegetative organs.
Morphogenesis is highly aberrant in the vegetative body of the holoparasite Lophophytum leandrii (Balanophoraceae): All typical vegetative organs are absent and many tissues are highly modified.