Question

The botanical name of ‘black mustard’ is
(a) Brassica nigra
(b) Brassica juncea
(c) Brassica napus
(d) Brassica campestris

Answer 1

Hint: This was first observed by W.D.J. Koch. This black muster has the very best glucosinolates. This plant may be a tall annual that's grown commercially for its seeds, which are dried and ground to form the familiar condiment mustard.

Complete step by step answer:
Brassica may be a genus of plants within the Cruciferae Brassicaceae. The members of the genus could also be collectively known either as cabbages mustards Crops from this genus are sometimes called cole crops from the Latin caulis or stem or cabbage.
Species black mustard by W.D.J. Koch which is also referred to as Brassica nigra .
- Black mustard is cultivated for its seeds, the source of the economic table- mustard, used as a condiment and medicine.
- Seeds contain both a hard and fast and an important oil, used as a condiment, illuminant, lubricant, and soap constituent.
- Black mustard is mixed with Brassica hirta (Sinapis alba) to form mustard flour, utilized in various condiments as "English Mustard" when mixed with water and "Continental Mustard" with vinegar.
- About 90- 95% of the glucosinolates in B. nigra are within the sort of sinigrin, hence selection for glucosinolate concentration is basically selection for sinigrin. Because sinigrin may be a heritable trait, it's easier to trace the selective advantage of glucosinolates.
- This consists of three community types where each community consists of 24 neighbor plants, surrounding a target invader.
High- sinigrin B. nigra monocultures
Low – sinigrin B. nigra monocultures
- Brassicaceae are non mycorrhizal. The heterospecific species are mycorrhizal.
So, the correct answer is, ‘(a) Brassica nigra.’

Note:
- Mustard is agriculturally used as a canopy crop.
- Mustard flowers are good honey producers.
- Mustard oil that's allyl isothiocyanate is employed in cat and dog repellents.
- The fitness of a B. nigra genotype depends on the community composition that's diverse vs. monoculture that it invades.