How is an onion a modified leaf?
In onion, the stem is modified into a condensed disc shaped structure. It possesses a terminal bud overlapped by the numerous scaly leaves. The leaves are modified into outer dry and scaly leaves which are protective in function. The inner fleshy and thick leaves store food.
What type of modified leaf is onion?
tunicate bulb
It is a tunicate bulb having a cluster of fleshy leaves. An onion is a modified underground stem structure. The onion plant stores its processed food in the bulged leaf structure at the base.
What are the modifications of leaf?
| Modification | Definition | Example |
|---|---|---|
| 4) Storage leaves | Leaves become fleshy due to storage of water and food material. | Aloe |
| 5) Cotyledons | The mature embryo shows either one or two cotyledons. | Angiosperms and gymnosperms |
| 6) Leaf bladders | Some of the leaves of aquatic plants modified into leaf bladders to trap small insects. | Utricularia |
What is the function of the modified leaves in an onion bulb?
A bulb’s fleshy leaves—which in some species are actually expanded leaf bases—function as food reserves that enable a plant to lie dormant when water is unavailable (during winter or drought) and resume its active growth when favourable conditions again prevail.
Is aloe vera a modified leaf?
Aloe vera leaf modification allows the plant to store water and thrive in dry climates. The leaves of the aloe vera plant are thick. A large amount of pulp inside the leaf stores both water and nutrients for the plant to thrive, advises the University of Wisconsin LaCrosse.
What is the modification of ginger?
Detailed Solution Ginger is an example of rhizome which is a type of modified underground stem.
Is succulent a modified leaf?
Storage leaves are thick leaves underground that store starch (as with a bulb; see Stem Modifications). Succulent leaves are also thickened leaves, but they are found above ground, still conduct photosynthesis, and function primarily in water storage (Figure 12.3. 2).
Are prickles modified leaves?
Spines are modified leaves, like those of cacti. Prickles are modified epidermis, like those of roses. Then there are all sorts of plants with spinose leaf margins, like English holly. Such defenses can be a nuisance to those of us who must work with them.
Are modified leaves which enclose and protect?
The buds of many woody plants are protected by a covering of modified leaves called bud scales. The bud scales enclose and protect the embyonic cells of the apical meristem which can remain dormant for extended periods.
Is flower a modified leaf?
The sepals and petals in flowers are considered as modified leaves. A flower is a modified shoot (stem bearing leaves).