Question

plant classification as per leaf modification​

Answer 1

Answer:

In many plants, leaves get modified to perform some special functions other than the normal ones, such as photosynthesis and transpiration.

Sometimes these modifications are in response to certain environmental conditions.

Some of the important modifications are given below.

1. Storage Leaves:

Some plants of xerophytic habitats and members of the family Crassulaceae generally have highly thickened and succulent leaves with water storage tissue. These leaves have large parenchymatous cells with big central vacuole filled with hydrophilic colloid. This kind of adaptation helps plants to conserve very limited supply of water and resist desiccation (drying up).

2. Leaf Tendrils:

In weak- stemmed plants, leaf or a part of leaf gets modified into green thread­like structures called tendrils which help in climbing around the support.

The parts of leaf which get modified into tendrils are as follows:

(i) Entire Leaf is Modified into Tendril, e.g., Lathyrus aphaca (wild pea) .

(ii) Upper Leaflets Modified into Tendrils, e.g, Pisum sativum (pea) , Lathyrus odoratus (sweet pea).

(iii) Terminal leaflets Modified into Tendrils, e.g., Naravelia

Leaf Tendrils

(iv) Leaf Tip Modified into Tendril, e.g., Gloriosa (Glory lily)

(v) Petiole Modified into Tendril, e.g., Clematis

(vi) Stipule Modified into Tendril, e.g., Smilax

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