Horticulture - Study Mode

[#206] Pointed gourd (dioecious) is propagated by
Correct Answer

(C) Stem cutting

Explanation

Solution: Pointed gourd (dioecious) is propagated by Stem cutting. Trichosanthes dioica, also known as a pointed gourd, is a vine plant in the family Cucurbitaceae, similar to cucumber and squash, though unlike those it is perennial. It is a dioecious vine plant with heart-shaped leaves and is grown on a trellis. It is normally propagated through stem cuttings & root suckers. Its seeds are not used in planting due to poor germination & inability to determine the sex of plants before flowering.

[#207] Litchi is propogated by
Correct Answer

(C) Air layering

Explanation

Solution: Litchi is propogated by air layering . Air-layering or 'Gootee' is a widely accepted method of propagation in India. In this method, a healthy and vigorous, upright twig of about one year old and 2.5 to 4 cm in diameter is selected. A circular strip of bark about 2 cm wide just below a bud is completely removed from the selected twig. The most commonly used commercial method of propagation of litchi is air layering. Litchis can also be propagated by seeds, grafting, or cuttings. The highly heterozygotic characteristic of this species prevents the commercial propagation by seeds.

[#208] Cum-swelling is due to
Correct Answer

(B) Clostridium botulinum

Explanation

Solution: Cum-swelling is due to Clostridium botulinum . Clostridium botulinum is a Gram-positive, rod-shaped, anaerobic, spore-forming, motile bacterium with the ability to produce the neurotoxin botulinum. The botulinum toxin can cause botulism, a severe flaccid paralytic disease in humans and other animals. It also causes swelling.

[#209] Induction of more staminate flowers in cucurbits is seen under
Correct Answer

(B) Long day condition

Explanation

Solution: Induction of more staminate flowers in cucurbits is seen under Long day conditions . Cucurbits have distinct, separate male and female flowers. This is a female flower and you can see the fruit right underneath it and over here is a simple male flower. The sterility is non-genetic, non-heritable, and induced with the help of chemicals that make the male part abortive, known as chemical-induced male sterility. Ethylene is the main factor of flower sex differentiation in the buds of the Cucurbitaceae family, which induces the femaleness of flowers. Induction of male flowering in gynoecious cucumbers by silver ions especially in long-day conditions.

[#210] Intergeneric hybrid of apple and pear is
Correct Answer

(D) Papple

Explanation

Solution: The intergeneric hybrid of apple and pear is Papple . An intergeneric hybrid is a cross between plants in two different genera in the same family. They are closely related enough that pollination will produce a hybrid, though the seeds of this hybrid are usually sterile. The Papple is a cross between Chinese and Japanese pear species. It is highly attractive with a red-orange blush over a yellow background. It has a mild sweet tropical flavour with a crisp and juicy texture. Papple is ready to eat and does not need time to ripen and soften.