What are the structural particularities of the plant organs?

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giorgiana1976 | College Teacher | (Level 3) Valedictorian

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Some plants are composed of a single cell (unicellular), as bacteria, or more cells (multicellular), with no differentiated organs, the body having a tal, as most algae, fungi and lichens.Cells in body of multicellular plant differ in form, structure and function. The cells with the same form and function are grouped into tissues. Association of several types of tissues  has the result as component organs of plant body. Each organ (root, stem, etc..) has a role in plant's life, which fulfils it through the activity of component tissues.

The  main tissues of plant are:

The protective tissue (defensive).

Skin covering bodies, defending them with the help of external membrane of cells, more thickened, sometimes mineralized or waxed.

Mechanical tissue (supportive) provides strength and soundness of the plant.

Fundamental tissues (parenchyma) have the largest spread in the plant body, performing some capital functions of their lives are: cortical parenchyma,the basic tissue  of stem bark and root, parenchyma of the spinal of same organs; assimilator parenchyma, rich in chloroplast, has role in photosynthesis, reserve parenchyma store reserve substances (starch in potato); parenchyma aquifer  accumulates water and mucilages, etc.

Conductive tissues ensure saps movement in the body plant.

Origin Tissues  (embryonic), the active proliferation of cells forming tissues of plants.

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versatilekamini | College Teacher | (Level 1) Valedictorian

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Although plants sometimes occur as isolated individuals, more commonly we find that they become adapted to the same enviornment and are associated together in groups. Some of the common groups are as follows. Xerophytes: These are plants that grow in deserts.The stems of many plants of xerophytes become very thick and fleshy.In some plants leaves are reduced in size minimizing their evaporating surfaces. Halophytes:These are plants growing in saline soil.They proudce a large number of stilt roots,special roots called respiratioy roots. Carnivorus plants: Such plants which get their nutrition from animals are called as carnivorous plants.They body parts of such plants are modified in several ways for capturing the insect prey.Some times the leaf becomes pitcher likeSome times it becomes like spoon shaped..

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