CREEPERS 2. The region of the stem between two nodes is called intemode. Leaves simple, alternate, spiral, clustered at twig ends; stipules small, lanceolate, caducous; petiole 1.2-4 cm long, swollen at both ends, planoconvex, glabrous, with subulate appendage at the junction of lamina; … In some plants, the petiole becomes flattened, taking the shape of a leaf and turns green in colour. 6 years ago Answers : (1) Sumreet Johar State University of New York,Stony Brook, USA askIITians Faculty 30 Points . In a pinnately compound leaf a 2.61 B) etc. The sensitive plant, Mimosa pudica, has leaves that close or move when touched. endobj 2. In some leguminous plants the leafbase may become swollen is called pulvinus. The reduction of silver chloride to silver nanoparticles Phyllode is a modification of- (a) Petiole. The petiole (mesopodium) connect the leafbase with lamina and help hold the blade to light. About half a score species are at present in cultivation, which come from China, Japan, the Himalaya, and Mexico. If the petiole has a swollen area at the base, where it joins to the stem, the swollen area is known as a pulvinus (plural, pulvini). Ordinary zucchini fruit are any shade of green, though the golden zucchini is a deep yellow or orange. Leaves: Leaves slightly spaced along branches or clustered at end of branches, spiral (leaves occurring singly at a node and arranged spirally up the branchlet) (internodes short so leaves often appearing pseudo-whorled), simple (a leaf composed of a single blade) (with milky white exudate when damaged); petiole present, not winged, attached to base of leaf blade, not swollen; leaves broadest above middle, … Bark brownish, smooth; blaze orange red. Is the broad part of leaf. For eg., Australian Acacia. When the petiole is present, this feature describes the presence or absence of a swelling at the base and/or … The compound leaves may be of two types (Figure 5.8). Trunk & Bark. At maturity, they can grow to nearly 1 metre (3 feet) in length, but they are normally harvested at about 15–25 cm (6–10 in).. Hypodermis is partly chlorenchymatous and partly collenchyma (Fig. In many cases, the petiole of the leaf is not distinct and such a leaf is called sessile. Long thin flexible petioles allow leaf blades to flutter in wind, thereby ... A bud is present in the axil of petiole in both simple and compound leaves, but not in the axil of leaflets of the compound leaf. Petiole – The petiole helps hold the blade to light. (iii) Generally there is always an axillary budin the axil of a leaf. become swollen, which is called the pulvinus. This is known as phyllode. (1) Foeniculum Petiole: It is more or less circular with a ring of vascular bundles and a cavity in the center. 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Pulvini are localized and specialized areas in stems or leaves composed of a group of thin-walled parenchyma cells. Such a modified petiole is called phyllode. LAMINA. In some plants petiole becomes swollen and spongy due to the development of aerenchyma. There may be swollen regions at either end of the petiole known as pulvina (singular= pulvinus) that are composed of a flexible tissue that allows leaf movement. There may be swollen regions at either end of the petiole known as pulvina (singular=pulvinus) that are composed of a flexible tissue that allows leaf movement. <>/ExtGState<>/Font<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 720 540] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. (iii) Leaf: These are green in colour. The present work is the outcome of ongoing studies, with a total of three field trips during the period 1996–2000. 1 0 obj Long thin flexible petioles allow leaf blades to flutter in wind, thereby cooling the leaf and bringing fresh air to leaf surface. Fill in the blanks with the terms that are listed below. In a few plants, one of the leaves present at the nodes gets modified into adventitious roots which helps them to float over the water surface. Explain various modifications of Petiole with help of well labelled diagram? 4. Sepals, (a)____ . The type of petioles encloses much air and helps the plant to float. 2 0 obj Leaf base often contains two small lateral outgrowths called stipules. The petiole help hold the blade to light. Swollen petiole. Question 4: The root nodules present in the roost of leguminous plants are a modification of ; tap roost ; adventitious roost ; fibrous roost ; it is not a modified structure ; Correct Option is : 1. 4. The petiole is swollen and includes the following internal structu­res: a. Epidermis: <> (v) The growth of leaf is limited. Ovules are present in this part of flower. It is located at the point where the petiole joins the leaf to stem. Solution: Across 1. Petioles of such kind are called phyllode. 3. Phyllode. Australian Acacia, Parkinsonia, etc. Pulvina are common in the bean family Fabaceae and the prayer plant family Marantaceae. Trees up to 18 m tall. Swollen petiole of Eichhornia is made up of Aerenchyma Sclerenchyma Chlorenchyma Collenchyma. (vii) A leaf has three main parts – Leaf base, petiole and leaf lamina. Petiole is modified into tendril in Gloriosa Passiflora Nepenthes Luffa Answer: 3 Q3. Absorbing leaves are found in (a) In hydrophytes, Parallel Venation is not found in- (a) Maize, Structure and Functions of Cell Organelles, Plant Tissue - Internal Morphology and Anatomy, Internal Structure of Root, Stem and Leaf. 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