Biology

Plant Propagation Techniques

660 Questions

Plant propagation techniques cover both natural and artificial methods of cultivating plants, including micropropagation, tissue culture, and layering. These botanical concepts evaluate how desirable characteristics are multiplied and transferred into new plants. Questions on this topic routinely feature in the biology segment of various state and central competitive exams.

Micropropagation methodsArtificial vegetative propagationPlant tissue cultureLayering techniquesMeristem differentiation

Plant Propagation Techniques Questions

Multiple choice

Sugarcane is normally grown by

  1. grafting

  2. stem cutting

  3. layering

  4. budding
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sugar cane propagation is through stem cuttings of immature canes 8-12 months old. These are called setts, seed, seed- cane or seed-pieces. The setts are best if taken from the upper third of the cane because the buds are younger and less likely to dry out. The setts can be planted at a 45 degree angle or laid horizontally in a furrow.

Multiple choice

Which of the following methods can be used to produce 'disease-free plants’?

  1. Grafting

  2. Layering

  3. Cutting

  4. Tissue culture
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Disease-free plants can be produced by tissue culture. In this technique, we can take few healthy cells and selectively multiply them to form new plants under sterile and aseptic conditions. But, in grafting or layering or cutting, the chances of having diseased plants are there because the cells cannot be selectively chosen in these and at any time, the pathogens may attack them.

Multiple choice

Sweet potato is propagated through

  1. stem

  2. root

  3. tuber

  4. rhizome

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sweet potato (Ipomoea batatas) is propagated vegetatively using its adventitious roots, which can sprout and form new plants.

Multiple choice

Clones can be obtained by

  1. tissue culture, micro-propagation and asexual reproduction

  2. tissue culture, micro-propagation and somatic hybridisation

  3. transplantation, micro-propagation and somatic hybridisation

  4. recombinant DNA technology, tissue culture and somatic hybridisation

  5. recombinant DNA technology, asexual reproduction and transplantation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Tissue culture, micro-propagation and asexual reproduction: Clones can be obtained by all these three methods.

Multiple choice

Virus free plants can be obtained from virus-infected plants by:

  1. Protoplast technology

  2. Culturing root tissue

  3. Culturing shoot apices

  4. None of the above methods
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Shoot apical meristems are often free of viruses even in infected plants because the virus cannot keep pace with the rapid cell division in the meristematic tissue.

Multiple choice

Embryo rescue technique has not been used in hybridization of:

  1. Oryza sativa

  2. Zea mays

  3. Corchorus

  4. Lycopersicum
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Embryo rescue is a technique used to save hybrid embryos that would otherwise abort due to endosperm failure. It is widely used in crops like Oryza, Corchorus, and Lycopersicum, but it is not a standard or necessary technique for Zea mays hybridization.

Multiple choice

Which of the following is not an advantage of artificial vegetative propagation?

  1. Many plants can be grown from just one parent plant by artificial propagation.

  2. The new plants produced by this method will be exactly like the parent plants.

  3. The fruit trees grown by this method start to bear fruits only after a few growing seasons.

  4. The plants grown by vegetative propagation usually need less attention in their early years than the plants grown from seeds.

  5. The plants are less prone to diseases in artificial vegetative propagation method.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option.