Skip to main content

Botanical Garden





A botanical garden (or botanic garden) is a well-tended area displaying a wide range of plants labelled with their botanical names. It may contain specialist plant collections such as cacti and succulent plants, herb gardens, plants from particular parts of the world, and so on; there may be greenhouses, shadehouses, again with special collections such as tropical plants, alpine plants or other exotic plants. Visitor services at a botanical garden might include tours, educational displays, art exhibitions, book rooms, open-air theatrical and musical performances and other entertainment.

Botanical gardens are often run by universities or other scientific research organizations and often have associated herbaria and research programmes in plant taxonomy or some other aspect of botanical science. In principle their role is to maintain documented collections of living plants for the purposes of scientific research, conservation, display and education, although this will depend on the resources available and the special interests pursued at each particular garden.

Comments

Popular posts from this blog

Phyllotaxy

Phyllotaxy is the pattern of arrangement of leaves on the stem or branch. This is usually of three types – alternate, opposite and whorled . In alternate type of phyllotaxy, a single leaf arises at each node in alternate manner, as in china rose, mustard and sun flower plants. In opposite type, a pair of leaves arise at each node and lie opposite to each other as in Calotropis and guava plants. If more than two leaves arise at a node and form a whorl, it is called whorled, as in Alstonia.

Emasculation and Bagging

If the female flower is bisexual , removal of anthers from the flower bud before the anther dehisce using a pair of forceps this is called emasculation . Emasculated flowers have to be covered with a bag of suitable size made of butter paper to prevent contamination of its stigma with unwanted pollen . this process is called bagging 

Salient Features of Human Genome

Some of the salient observations drawn from human genome project areas follows: (i)The human genome contains 3164.7 million nucleotide bases. (ii)The average gene consists of 3000 bases, but sizes vary greatly, withthe largest known human gene being dystrophin at 2.4 million bases. (iii)The total number of genes is estimated at 30,000–much lower than previous estimates of 80,000 to 1,40,000 genes. Almost all(99.9 per cent) nucleotide bases are exactly the same in all people. (iv)The functions are unknown for over 50 per cent of discovered genes. (v)Less than 2 per cent of the genome codes for proteins. (vi)Repeated sequences make up very large portion of the humangenome. (vii)Repetitive sequences are stretches of DNA sequences that arerepeated many times, sometimes hundred to thousand times. They are thought to have no direct coding functions, but they shed light on chromosome structure, dynamics and evolution. (viii)Chromosome 1 has most genes (2968), and the Y has t...