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Aerial stem modifications are modifications to the aerial stems, [1] vegetative buds and floral buds of plants growing in different conditions and which perform functions such as climbing, protection, support, synthesis of food, or vegetative propagation. [2] [3] Aerial stem structures that undergo modifications to perform these special functions include tendrils, thorns, hooks, phylloclade, tuberous stems, and bulbils. [4] [5] [6] The auxiliary or the terminal part of the modified structures shows their stem nature. [7]
Some weak-stemmed plants produce wiry, coiled, sensitive, and delicate organs for climbing. They are called tendrils. [8] These may develop from either the axillary bud or the terminal bud of the stem. In Passiflora , the tendrils develop from the axillary bud. In Cissus quadrangularis and in Vitis vinifera , the terminal bud develops into tendrils. [9] [10] [11]
These are hard, woody, pointed structures meant for protection. They are provided with vascular tissue, [12] which may develop from the axillary bud or terminal buds. [13] They control transpiration by reducing the vegetative growth. In Bougainvillea , Punica granatum , and Duranta , the axillary bud develop into thorns. [14] [15] [16] [17] In Duranta, the thorns are provided with leaves and flowers. In Punica granatum , the thorns bear leaves and branches. [18] In Carissa carandas , the terminal bud produces a pair of thorns. They help in protection. [19]
When the axillary bud becomes fleshy and rounded due to the storage of food, it is called a bulb. [20] It gets detached from the plant, falls on the ground, and develops into a new plant. e.g. Dioscorea . [21] It is in the axil (the space between the leaf and stem). [22]
These are green branches of limited growth (usually one internode long) that have taken up the functions of photosynthesis. [23] True leaves are reduced to scales or spines, e.g. Asparagus . [24]
A vine is any plant with a growth habit of trailing or scandent stems, lianas, or runners. The word vine can also refer to such stems or runners themselves, for instance, when used in wicker work.
The pomegranate is a fruit-bearing deciduous shrub in the family Lythraceae, subfamily Punicoideae, that grows between 5 and 10 m tall. Rich in symbolic and mythological associations in many cultures, it is thought to have originated from Afghanistan and Iran before being introduced and exported to other parts of Asia, Africa, and Europe.
In botany and dendrology, a rhizome is a modified subterranean plant stem that sends out roots and shoots from its nodes. Rhizomes are also called creeping rootstalks or just rootstalks. Rhizomes develop from axillary buds and grow horizontally. The rhizome also retains the ability to allow new shoots to grow upwards.
Passiflora edulis, commonly known as passion fruit, is a vine species of passion flower native to the region of southern Brazil through Paraguay to northern Argentina. It is cultivated commercially in tropical and subtropical areas for its sweet, seedy fruit.
Passiflora, known also as the passion flowers or passion vines, is a genus of about 550 species of flowering plants, the type genus of the family Passifloraceae.
Punica is a small genus of fruit-bearing deciduous shrubs or small trees in the flowering plant family Lythraceae. The better known species is the pomegranate. The other species, the Socotra pomegranate, is endemic to the island of Socotra. It differs in having pink flowers and smaller, less sweet fruit.
In botany, a tendril is a specialized stem, leaf or petiole with a thread-like shape used by climbing plants for support and attachment, as well as cellular invasion by parasitic plants such as Cuscuta. There are many plants that have tendrils; including sweet peas, passionflower, grapes and the Chilean glory-flower. Tendrils respond to touch and to chemical factors by curling, twining, or adhering to suitable structures or hosts. Tendrils vary greatly in size from a few centimeters up to 27 inches for Nepenthes harryana The chestnut vine can have tendrils up to 20.5 inches in length. Normally there is only one simple or branched tendril at each node, but the aardvark cucumber can have as many as eight.
Lythraceae is a family of flowering plants, including 32 genera, with about 620 species of herbs, shrubs, and trees. The larger genera include Cuphea, Lagerstroemia (56), Nesaea (50), Rotala (45), and Lythrum (35). It also includes the members of the former families of the pomegranate and of the water caltrop. Lythraceae has a worldwide distribution, with most species in the tropics, but ranging into temperate climate regions as well.
Passiflora foetida is a species of passion flower that is native to the southwestern United States, Mexico, the Caribbean, Central America, and much of South America. It has been introduced to tropical regions around the world, such as Southeast Asia, South Asia, Hawaii, Africa, and The Maldives. It is a creeping vine like other members of the genus, and yields an edible fruit. The specific epithet, foetida, means "stinking" in Latin and refers to the strong aroma emitted by damaged foliage.
Passiflora incarnata, commonly known as maypop, purple passionflower, true passionflower, wild apricot, and wild passion vine, is a fast-growing perennial vine with climbing or trailing stems. A member of the passionflower genus Passiflora, the maypop has large, intricate flowers with prominent styles and stamens. One of the hardiest species of passionflower, it is both found as a wildflower in the southern United States and in cultivation for its fruit and striking bluish purple blooms.
Passiflora ligularis, commonly known as the sweet granadilla or grenadia, is a plant species in the genus Passiflora. It is known as granadilla in Bolivia, Colombia, Nicaragua, Costa Rica, Ecuador, Mexico, The Azores, South Africa, and Peru, granadilla común in Guatemala, granadilla de China or parcha dulce in Venezuela, maracuja doce in Brazil, and granaditta in Jamaica.
Underground stems are modified plant parts that derive from stem tissue but exist under the soil surface. They function as storage tissues for food and nutrients, facilitate the propagation of new clones, and aid in perennation. Types of underground stems include bulbs, corms, rhizomes, stolons, and tubers.
Important structures in plant development are buds, shoots, roots, leaves, and flowers; plants produce these tissues and structures throughout their life from meristems located at the tips of organs, or between mature tissues. Thus, a living plant always has embryonic tissues. By contrast, an animal embryo will very early produce all of the body parts that it will ever have in its life. When the animal is born, it has all its body parts and from that point will only grow larger and more mature. However, both plants and animals pass through a phylotypic stage that evolved independently and that causes a developmental constraint limiting morphological diversification.
Geranium carolinianum is a species of geranium known by the common name Carolina crane's-bill, or Carolina geranium. This species is native to North America, where it is widespread and grows in many types of habitat. There are two varieties; Geranium carolinianum var. carolinianum and the Geranium carolinianum var. sphaerospermum. This is a summer or winter annual herb. It can be considered invasive depending on the region, when it is found in the United States it is considered to be native.
A stem is one of two main structural axes of a vascular plant, the other being the root. It supports leaves, flowers and fruits, transports water and dissolved substances between the roots and the shoots in the xylem and phloem, engages in photosynthesis, stores nutrients, and produces new living tissue. The stem can also be called the culm, halm, haulm, stalk, or thyrsus.
The secretary of state of Arizona is an elected position in the U.S. state of Arizona. Since Arizona does not have a lieutenant governor, the secretary stands first in the line of succession to the governorship. The secretary also serves as acting governor whenever the governor is incapacitated or out of state. The secretary is the keeper of the Seal of Arizona and administers oaths of office. The current office holder is Democrat Adrian Fontes.
Plant tissue culture is a collection of techniques used to maintain or grow plant cells, tissues, or organs under sterile conditions on a nutrient culture medium of known composition. It is widely used to produce clones of a plant in a method known as micropropagation. Different techniques in plant tissue culture may offer certain advantages over traditional methods of propagation, including:
Passiflora maliformis, the sweet calabash, conch apple, wild purple passionfruit, or sweet cup, is a smallish passionfruit with purple, yellow or green skin and a greyed-yellow to orange pulp that is aromatically scented and flavoured. It is a fast-growing vine, growing best in somewhat cooler-than-tropical climates. The rind is particularly hard and tougher than most passionfruits. It is usually eaten fresh or used to flavour drinks. It is a native to the Caribbean, Central America and Northern South America.
Passiflora loefgrenii, the garlic passion fruit, is a passion flower first formally described in 1997 by Fabio Augusto Vitta. The plant is named after Albert Löfgren, the first known collector.
The passion fruit is the fruit of several plants in the genus Passiflora.
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