Question

Leptome is used for?
(a) Phloem
(b) Xylem
(c) Fibers
(d) Parenchyma

Answer 1

Hint: It can be said that its function is to conduct food materials. It is the vascular tissue in charge of transport and distribution of the organic nutrients. It is also a pathway to signaling molecules and has a structural function in the plant body.

Complete answer :
Leptome is another name of phloem and is the part of the mestome that conducts food materials and is a somewhat rudimentary phloem in cryptogams. It is used for the conduction of organic materials (photosynthates) during photosynthesis. It also transports amino acids.

Diagram showing the presence of leptome in the stem of a plant.

Additional Information:
1. Xylem is a transport tissue in vascular plants that transports water from roots to stems and leaves, other than these it also transports nutrients.
2. Fibers are elongated cells whose long, tapering ends interlock, thus providing maximum support to a plant. They remain present almost anywhere in the plant body, including the stem, the roots, and the vascular bundles in leaves.
3. Parenchyma is the functional tissues in plants and animals. In plants, they refer to a specific type of ground tissue having thin cell walls and the ability to grow and divide. They make up most of the cells within leaves, flowers, and fruits.

So, the correct answer is, 'Phloem'

Notes:
1. Sieve cells are an important part of phloem tissues in flowering plants. They play a very important role in the functioning of phloem by transporting organic compounds made during photosynthesis.
2. The nucleus is absent in mature sieve tube but contains cytoplasm while functional
3. Aphids (Greenfly) and other insects feed on the phloem.
4. They insert a fine tube into the plant, penetrating the tiny phloem cells deep within the plant.
5. The very high pressure in the phloem tubes forces the phloem sap into the insect.
6. Most of the sugar passes right through the insect, so that nearby surfaces get sticky and often become black due to the growth of algae.