Question

how leaves develop into new plants​

Answer 1

Answer:

Once the embryo germinates from its seed or parent plant, it begins to produce additional organs (leaves, stems, and roots) through the process of organogenesis. New roots grow from root meristems located at the tip of the root, and new stems and leaves grow from shoot meristems located at the tip of the shoot.

Answer 2

Answer:

Leaves are thin, flat organs responsible for photosynthesis in the plants. It develops laterally at the node. It is an important part of the shoot system and it originates from shoot apical meristems.

Explanation:

• The first thing that form are a tiny root (to get water and nutrients), and the stem and leaf cells.
• These cells then rapidly divide and divide, letting the stem push up and out of the soil towards the light. Once cells in the stem sense light, the tiny curled up leaves get the signal to open.
• The cells that form the leaf originate from the stem cell niche at the shoot apical meristem(SAM) . As a first step in their development, cells need to loose stem cell identity .
• A leaf primordium is initiated in groups of cells that migrate into the lateral regions of the SAM which further acquires upper (adaxial) and lower (abaxial) sides through leaf-polarity control.
• Afterward, the transformation of the small leaf primordium to a mature leaf is controlled by at least six distinct processes: cytoplasmic growth, cell division, endoreduplication , transition between division and expansion, cell expansion and cell differentiationinto stomata , vascular tissue, and trichomes.
• Most of these processes are tightly controlled by different signaling molecules, including phytohormones.
• The developmental path of cells is indicated with red arrows, key regulatory processes are numbered and indicated and regulation of these processes by phytohormones.

Structure of leaf:

1. Leaves are attached to the plant stem by a petiole, though there are also leaves that attach directly to the plant stem.
2. The vascular tissue (xylem and phloem) run through veins in the leaf, which also provide structural support.
3. These needle-like leaves have sunken stomata (pits that allow gas exchange) and a smaller surface area: two attributes that aid in reducing water loss.
4. In hot climates, plants such as cacti have leaves that are reduced to spines, which in combination with their succulent stems, help to conserve water.
5. Many aquatic plants have leaves with wide lamina that can float on the surface of the water, and a thick waxy cuticle (waxy covering) on the leaf surface that repels water.
6. Certain organs that are superficially very different from the usual green leaf are formed in the same manner and are actually modified leaves; among these are the sharp spines of cacti, the needles of pines and other conifers, and the scales of an asparagus stalk or a lily bulb.

Attaching some images from google for better understanding.

Learn more about this topic on brainly:

https://brainly.in/question/24749881

https://brainly.in/question/11723039