Question

Ipomea batatas is propagated vegetatively by using __________.
A)Bulbs
B)Corns
C)Tuber
D)Vine cuttings

Answer 1

Hint: The plant is a perennial herbaceous vine, bearing alternating heart-shaped or palmately lobed leaves and sympetalous medium-sized flowers. Typically on the earth, the stems crawl and develop adventitious roots at the nodes. They screw the leaves around the stems.

Complete answer:
5-6 inches of a good vine ideally with fresh leaves on top of it is selected. An ideal cut should have fresh leaves on top of it, cut at an angle of 45 degrees at a node and growing it in a jar of water before roots begin to emerge, Ipomea batatas (sweet potato) belonging to the family "Convolvulaceae" can be well propagated. The cutting should be transplanted into a soil containing pot, where it will mature into an adult plant, until roots begin to develop.

The cultivated sweet potato genome includes Agrobacterium (now reclassified as Rhizobium) DNA sequences, with genes actively expressed by the plants. In closely related wild relatives of the sweet potato, the T-DNA transgenes were not detected. Studies have shown that the sweet potato genome has developed over centuries, taking advantage of natural genetic variations for the eventual domestication of the fruit. Such findings make sweet potatoes the first known example of a food crop that is naturally transgenic.

Hence, the correct answer is option (D)

Note: Crude sweet potatoes are high in complex carbohydrates, dietary fibre and beta-carotene (provitamin A carotenoid) with modest amounts of other micronutrients, including vitamin B5, vitamin B6 and manganese, in addition to basic starches.