Plant Biotechnology

BLAST (Basic Local Alignment Search Tool) is an algorithm and tool used to compare primary biological sequence information, such as the amino acid sequences of proteins or the nucleotides of DNA sequences. It is primarily a searching tool.

Proteomics is the large-scale study of proteins, particularly their structures and functions. While proteins are made of amino acids and include enzymes, the term specifically refers to the entire complement of proteins.

Genomics is a broad field of biology focusing on the structure, function, evolution, mapping, and editing of genomes. This encompasses the study of individual genes, hereditary material (DNA), and chromosomes.

The nitrogenase enzyme complex consists of two proteins: the Fe protein, which is a homodimer (2 subunits), and the MoFe protein, which is a heterotetramer (4 subunits). Together, they form the active complex with 4 and 2 subunits.

Nodulation (nod) genes are responsible for the initiation and formation of root nodules in symbiotic relationships between rhizobia and host legumes. Nif genes, on the other hand, encode the nitrogenase enzyme responsible for the actual fixation of nitrogen.

Rhizobium is a genus of Gram-negative, motile, rod-shaped bacteria that establish symbiotic relationships with the roots of leguminous plants.

While Rhizobium and Bradyrhizobium are obligate symbiotic nitrogen fixers, and Azolla forms an obligate symbiosis with Anabaena, many Blue-Green Algae (BGA) can fix nitrogen in a free-living, non-symbiotic state.

Anabaena and Rhizobium are well-known nitrogen-fixing bacteria. Although Azolla is a eukaryotic fern, it is frequently grouped with these organisms in agricultural contexts because it houses the nitrogen-fixing cyanobacterium Anabaena azollae.

Biological nitrogen fixation is the process where atmospheric nitrogen gas (N2) is reduced to ammonia (NH3) by the enzyme nitrogenase, making ammonia the primary product.

Cryopreservation involves storing biological samples at extremely low temperatures, typically in liquid nitrogen at -196 degrees Celsius. The option '195 cold' is a slightly imprecise representation of this temperature range.

Embryo rescue is a plant breeding technique used to save weak, immature, or hybrid embryos that would otherwise abort or fail to develop after fertilization has occurred.

Murashige and Skoog (MS) medium is the most widely used nutrient medium for plant in vitro cell, tissue, and organ culture.

A callus is a growing mass of unorganized, undifferentiated plant parenchyma cells. It is typically produced when plant tissues are placed on nutrient media in tissue culture.

Micropropagation can be initiated from various types of plant tissue explants, including buds, leaves, stems, and roots, to regenerate whole clonal plants.

In plant tissue culture, an intermediate or balanced ratio of auxin to cytokinin promotes the proliferation of unorganized callus tissue. High auxin promotes roots, while high cytokinin promotes shoots.

Gottlieb Haberlandt (misspelled as 'Herblandnt') is regarded as the father of plant tissue culture because he was the first to isolate and culture plant cells in nutrient solutions.

The first successful transgenic plant was produced in 1983 using an antibiotic-resistant tobacco plant (Nicotiana tabacum) via Agrobacterium-mediated transformation.

Somatic hybridization is a technique that allows the fusion of protoplasts from two different plant varieties or species to form a hybrid. This bypasses sexual reproduction barriers and is achieved through protoplast fusion.

Polyethylene glycol (often misspelled or referred to as polyvinyl glycol in some questions) is a widely used fusogenic agent (fusogen) that induces protoplast fusion in somatic hybridization.

Plant Growth Regulators (PGRs) include auxins, gibberellins (GA), cytokinins, abscisic acid, and ethylene. Polyphenols are secondary metabolites involved in defense and pigmentation, not primary growth regulation.

Plant biotechnology is a highly interdisciplinary field that involves the genetic modification of plants to produce GMOs, as well as the production of valuable compounds like biopharmaceuticals and antibiotics in plant systems.

A cybrid (cytoplasmic hybrid) is produced by fusing a normal protoplast of one species with an enucleated protoplast of another, resulting in a cell with the nucleus of one parent and the cytoplasm of both.

Haploid plants are typically produced through androgenesis via anther or pollen culture, where the haploid microspores are induced to develop into sporophytic plants.