Thesis online on plant tissue culture

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Thesis online on plant tissue culture

However, this capitalisation is considered incorrect today. The specific epithet rajah means "King" in Malay and this, coupled with the impressive size of its pitchers, has meant that N. Folia mediocria petiolata, lamina oblonga v. Longitudinal veins 3—4 rarely 5 on each side, originating from the basal part of the midrib, running parallel in the outer half of the lamina, pennate veins running obliquely towards the margin, irregularly reticulate in the outer part of the lamina.

Lower surface of the lid covered in many elevated glands, those on the keel with a wide mouth, the others with a very narrow one.

Intermediate and upper pitchers rarely produced, conical, smaller, lighter in colour; usually yellow, wings reduced to ribs. Flowers brownish-yellow in colour, give off strong sugary smell. Stem with long spreading brown hairs when young, later glabrous. Pitchers densely covered with long spreading brown hairs when young, later sparsely hairy or glabrous.

Inflorescences densely covered with adpressed brown hairs when young, later more sparsely hairy in the lower part, indumentum persistent in the upper part on the peduncles and on the perigone, ovaries densely appressedly hairy, fruits less densely hairy to glabrous.

The stem usually grows along the ground, but will attempt to climb whenever it comes into contact with an object that can support it. This is especially common in plants from tissue culturewhere numerous offshoots may form at a young age.

Leaves[ edit ] Leaves are produced at regular intervals along the stem. They are connected to the stem by sheathed structures known as petioles. A long, narrow tendril emanates from the end of each leaf. At the tip of the tendril is a small bud which, when physiologically activated, develops into a functioning trap.

Hence, the pitchers are modified leaves and not specialised flowers as is often believed. The green structure most similar to a normal leaf is specifically known as the lamina or leaf blade.

The leaves of N. They are leathery in texture with a wavy outer margin.

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The leaves are characteristically peltatewhereby the tendril joins the lamina on the underside, before the apex. This characteristic is more pronounced in N. However, it is not unique to these two taxa, as mature plants of many Nepenthes species display slightly peltate leaves.

A typical terrestrial pitcher Pitchers[ edit ] All Nepenthes pitchers share several basic characteristics. Traps consist of the main pitcher cup, which is covered by an operculum or lid that prevents rainwater from entering the pitcher and displacing or diluting its contents.

A reflexed ring of hardened tissue, known as the peristomesurrounds the entrance to the pitcher only the aerial pitchers of N. A pair of fringed wings run down the front of lower traps and these presumably serve to guide terrestrial insects into the pitchers' mouth.

Accordingly, the wings are greatly reduced or completely lacking in aerial pitchers, for which flying insects constitute the majority of prey items. Nepenthes rajah, like most species in the genus, produces two distinct types of traps.

These are very large, richly coloured, and ovoid in shape. In lower pitchers, the tendril attachment occurs at the front of the pitcher cup relative to the peristome and wings. These traps rest on the ground and are often reclined, leaning against surrounding objects for support.

They are usually red to purple on the outside, whilst the inside surfaces are lime green to purple. This contrasts with all other parts of the plant, which are yellow-green.

Thesis online on plant tissue culture

The lower pitchers of N. The tendril attachment in upper pitchers is normally present at the rear of the pitcher cup.

Thesis online on plant tissue culture

True upper pitchers are seldom seen, as the stems of N. Pitchers that do not fall directly into either category are simply known as "intermediate" pitchers.Nov 24,  · The Asahi Shimbun is widely regarded for its journalism as the most respected daily newspaper in Japan.

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Joseph Dalton Hooker described Nepenthes rajah in , naming it in honour of Sir James Brooke, the first White Rajah of Sarawak.

In the past, the Latin name was written as Nepenthes Rajah, since it derives from a proper arteensevilla.comr, this capitalisation is considered incorrect today. 'Rajah Brooke's Pitcher Plant' is an accurate, but seldom-used common name.

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Plant tissue culture has a great significance in plant biotechnology specially in the crop improvement programmes. The term tissue culture may be defined as the process of in-vitro culture of explants (pieces of living differentiated tissues) in nutrient medium under aseptic conditions.

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