This article needs additional citations for verification .(November 2010) |
Introduction
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 bulb [20] l. It gets detached from the plant, falls on the ground, and develops into a new plant. e.g. Dioscorea . [21] It is in the ax el (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.
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 southern Brazil. It is cultivated commercially in tropical and subtropical areas for its sweet, seedy fruit. The fruit is a pepo, a type of berry, round to oval, either yellow or dark purple at maturity, with a soft to firm, juicy interior filled with numerous seeds. The fruit is both eaten and juiced, with the juice often added to other fruit juices to enhance aroma.
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 threadlike 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 pomegranate and 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.
The axillary bud is an embryonic or organogenic shoot located in the axil of a leaf. Each bud has the potential to form shoots, and may be specialized in producing either vegetative shoots or reproductive shoots (flowers). Once formed, a bud may remain dormant for some time, or it may form a shoot immediately.
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.
Phlox nivalis is a species of flowering plant in the Polemoniaceae family, it is commonly known as the trailing phlox, but other common names include Pineland phlox, Pine phlox, and sweet trailing. It is native to the southeastern states, along with Texas, Utah, and Michigan.
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, photosynthesis takes place here, stores nutrients, and produces new living tissue. The stem can also be called halm or haulm or culms.
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.
Duranta erecta is a species of flowering shrub in the verbena family Verbenaceae, native from Mexico to South America and the Caribbean. It is widely cultivated as an ornamental plant in tropical and subtropical gardens throughout the world, and has become naturalized in many places. Common names include golden dewdrop, pigeon berry, and skyflower.
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.
The passion fruit is the fruit of a number of plants in the genus Passiflora.
{{cite journal}}
: Cite journal requires |journal=
(help){{cite journal}}
: Cite journal requires |journal=
(help)