The lamina possesses a network of veins. - Science Class 6 lamina | petiole | As nouns the difference between lamina and petiole is that lamina is lamina while petiole is (botany) the stalk of a leaf, attaching the blade to the stem. Answered Define petiole and lamina 2 The lamina is typically the location of the majority of photosynthesis. See Wiktionary Terms of Use for details. It is of two types, Pinnately reticulate venation : In this type of venation there is only one midrib in the center which forms many lateral branches to form a net work. and veins conduct water and food. August 1998. The three main parts of a typical leaf are 1. The leaflets are borne on a common axis and they do not bear any axillary buds in their axils. Such specialities are to be described in such cases. Lamina, Leaves are green, thin flattened lateral outgrowths of the stem. Creative Commons Attribution/Share-Alike License; (anatomy) A thin plate or scale, such as the arch of a vertebra. Parallel Venation: In this type of venation all the veins run parallel to each other. Log in. 1.Alternate phyllotaxy: In this type the leaves are arranged alternatively in the nodes. It may be with incision or without incision. The leaf consists of three parts namely, leaf base (usually provided with a pair of stipules), petiole and leaf blade or lamina. lamina support (including petioles, rachis and petiolules) than the simple-leaved species, whereas the former had a smaller lamina area or lamina mass at a given petiole mass than the latter. Eg. Morphological petiole–lamina scaling. Bipinnate 3. Volume 111, Issue 4. Share to Twitter Share to Facebook. Explants with the basal half of the lamina and the entire petiole were much more responsive than those with whole lamina and petiole. (botany) The flat part of a leaf or leaflet; the blade. Sluiten. The three main parts of a typical leaf are 1. Marsilia) 5. Answer: The foliage leaf consists of three parts, namely leaf base, petiole and lamina. b. Palmately parallel venation : In this type several veins arise from the tip of the petiole and they all run parallel to each other and unite at the apex. Shlok1980 Shlok1980 17.09.2020 Science Primary School +5 pts. Log in. Mango. The plants from the high altitude had less lamina area at a given petiole investment compared a. Pinnateley Parallel venation : In this type, there is a prominent midrib in the centre. The finding of a positive and allometric relationship between petiole dry mass and lamina dry mass , with a disproportionately higher petiole mass for a given lamina mass, is in agreement with what has been previously described (Niinemets et al. 2.Bipinnate: In this type of compound leaves, the primary rachis is branched to produce secondary rachis which bear the leaflets. e.g.Mango. 5. This is the most important, green part of the leaf which is mainly concerned with the manufacture of food. Text is available under the Creative Commons Attribution/Share-Alike License; additional terms may apply. The three main parts of a typical leaf are 1. lamina area; whilst a contrasting pattern was observed between lamina mass and petiole mass, in which the evergreens had a greater biomass allocation to lamina for the same petiole mass relative to the deciduous. The leaflets are known as the pinnae. As nouns the difference between lamina and petiole is that lamina is lamina while petiole is (botany) the stalk of a leaf, attaching the blade to the stem. Join now. 1.Unipinnate: In this type the pinnae are borne directly on the rachis. This laterally gives out fine branches called veins. It helps in seismonast… Other articles where Petiole is discussed: abaca: …the plant leaf stalks (petioles). Menu en zoeken; Contact; My University; Student Portal Ionic Interactions of Petiole and Lamina During the Life of a Leaf of Castor Bean (Ricinus communis L.) Under Moderately Saline Conditions Ask your question. Compound leaf: Here the lamina is divided in to a number of leaf like lobes called the leaflets. Alamanda. Lemon) 2. are in the same direction i.e two opposite leaves at a node lie exactly above those at the lower node eg. In most of the dicotyledonous plants, the leaf-base bears two lateral appendages called the stipules. ***** Download PDF. Both petiole elongation and lamina growth reduction are dependent on PIF7. 2. Unipinnate 2. In this regard, peltate leaves are biomechanically especially interesting as the transition area from petiole to lamina realises a substantial change of geometry in a very compact shape. There is only one leaf at each node. (entomology) A narrow or constricted segment of the body of an insect. Midrib: Petiole continues to the lamina as. Differences between the oils of the two organs were mainly quantitative. The thin stalk below the lamina is the petiole. Aerial modifications 2. Petiole 3. eg. Niklas KJ(1). Petiole mechanics, light interception by Lamina, ... to shear petioles at their base from twigs were correlated with the cross-sectional areas of phyllopodia but not with petiole length or tissue volume. In angiosperms leaves commonly have a pair of structures known as stipules, which are located on each side of the leaf base and may resemble scales, spines, glands, or leaflike structures. The petiole part of the leaf is also called as mesopodium. Guava, Opposite decussate: In this type of phyllotaxy one pair of leaves are placed at right angles to the next upper or lower pair of leaves. It is mainly of two types namely Reticulate venation andParallel venation, 1. Transformation of pixel coordinates to petiole length and lamina area was performed using … Petiole : Petiole connects the lamina with the stem or the branch. The induction of auxin production is both necessary and sufficient to induce opposite growth responses in petioles vs lamina. We now show that besides medium supplementation with auxin and cytokinin, the presence of lamina and petiole in the explant influence shoot bud induction. Loads induced through the lamina are redirected into the strengthening struc-tures of the petiole while achieving high stiffness levels. Although sometimes known as Manila hemp, Cebu hemp, or Davao hemp, the abaca plant is not related to true hemp. 52, 4, p. 332-334 3 p. Research output: Contribution to journal › Comment/Letter to the editor › Academic › peer-review Leaf base 2. This gives a characteristic foliage arrangement to the plant. Simple Leaf: A leaf is said to be simple in which the leaf blade or lamina is entire. ... to shear petioles at their base from twigs were correlated with the cross-sectional areas of phyllopodia but not with petiole length or tissue volume. Under ground modifications, Leaf Venation : Reticulate, Parallel : Pinnately, Palmately, Inflorescence : Racemose, Cymose, Mixed and Special types, FLOWER - A Metamorphosed Shoot : Evidences to support that flower is a modified shoot, Types of Placentation : Axile,Marginal, Parietal, Basal, Superficial Placentation. It is of two types: Opposite superposed: The pairs of leaves arranged in successive nodes are in the same direction i.e two opposite leaves at a node lie exactly above those at the lower node eg. … According to the number of leaflets present the compound leaf may be 1. unifoliate (eg. midrib. The essential oil in lamina and petiole of heracleum-dissectum leaves Montanarella, L., Bos, R. & Fisher, FC., Aug-1986, In : Planta Medica. Does this length include both the lamina and petiole, or only the Ask your question. The upper angle between a leaf and a stem is known as the axil of the leaf. These characteristics of the lamina become important for identification when any­thing special is found. Rijksuniversiteit Groningen founded in 1614 - top 100 university. Lamina, Leaves are green, thin flattened lateral outgrowths of the stem. Multifoliate (eg. It is said to besessile when the leaf does not have a petiole. Neem .When the number of leaflets is even it is said to be paripinnate eg. Allometric relationships between lamina area, lamina mass and petiole mass of 93 temperate woody species vary with leaf habit, leaf form and altitude Petiole mechanics, light interception by Lamina, and "Economy in Design". Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail, Parts of a Leaf : 1. Petiole is purplish-red, sparsely covered with short, purplish pubescence, about 2.5-3.5 cm long. Q3. 1. The essential oils of lamina and petiole of Heracleum dissectum are described. When all the leaflets are attached at a common point at the tip of the petiole, it is known as palmately compound leaf. Oxalis) 4. quadrifoliate (eg. (entomology) The stalk at the base of the nest of the paper wasp. Newer Post Older Post Home. Bombax). Petiole part of the leaf is also known as? The green leaves of the plant are collectively called as foliage of the plant. Thus, the correct answer is ‘Mesopodium.’ Q4. 4. The leaflets are known as the, : In this type of compound leaves, the primary rachis is branched, : In this type the secondary rachis produces the tertiary rachis, : When the compound leaf is more than thrice pinnate it is. Acacia. According to the number of leaflets present the compound leaf may be 1. They are borne at the nodes of the stem. Taking whole leaf cuttings is a suitable method of propagation for plants such as Sinningia (syn. Reticulate Venation: This type of venation is common in all dicot leaves. The pinnately compound leaf may be of the type 1. Lamina- The lamina is the expanded portion or blade of a leaf and it is an above-ground organ specialised for photosynthesis. Leaf ( Veins, Petiole, Lamina, Midrib Node & Internode ) - Chapter 7 - Getting to. The lamina part of the leaf is called as epipodium. Net photosynthesis in the petiole was about 75% of that recorded in the lamina. Used especially to refer to the metasomal segment of Hymenoptera such as wasps. eg. Suitable for... Plants such as Streptocarpus, Sansevieria, Eucomis, Sinningia (syn. Plant - Root System : Regions of a typical root and General Characteristic features of the root, Types of Root System And Functions of roots, Root Modifications for Taproot, adventitious roots, Characteristic features and Functions of the stem, Modifications of stem : 1. Leaf base 2. eg. Moringa, 4.Decompound : When the compound leaf is more than thrice pinnate it is said to be decompound. Abstract: Laminae and petioles from mature winter leaves of Arum italicum were studied in order to obtain information on the sun—shade intra‐tissue properties of chloroplasts. They are borne at the nodes of the stem. Define petiole and lamina Get the answers you need, now! A leaf is, The arrangement of veins in the leaf blade or lamina is called, In this type, there is a prominent midrib in, : In this type the leaves are arranged alternatively in, : In this type of arrangement two leaves are present, : The pairs of leaves arranged in successive nodes. Petiole 3. Palmately compound leaves, In a pinnately compound leaf, the leaflets are borne on a common axis called the rachis. Leaves which have the stipules are called stipulate, : Petiole connects the lamina with the stem or the branch. Hence it is called divergent. The veins have both xylem and phloem elements which are continuous with similar tissues of the stem through those of the petiole. Empirically determined morphometric and biomechanical data were used to … Leaves are green, thin flattened lateral outgrowths of the stem. (botany) The stalk of a leaf, attaching the blade to the stem. A leaf is said to be petiolate when it has a petiole. Gloxinia), Begonia masoniana and B. rex hybrids can be propagated from part-leaf cuttings.. petiole to lamina realises a substantial change of geom-etry in a very compact shape. The purpose of phyllotaxy is to avoid overcrowding of leaves so as to expose the leaves maximum to the sunlight for photosynthesis. 1.a) Pinnately Reticulate          1.b) Palmately Reticulate, 2.a) Pinnately Parallel    2.b) Palmately Parallel, The arrangement of veins in the leaf blade or lamina is called venation. Pinnately  compound leaves 2. In leaf: Leaf morphology …a broad expanded blade (the lamina), attached to the plant stem by a stalklike petiole. In Borassus (Palmyra) all the main veins spread out towards the periphery. Phyllotaxy: The arrangement of leaves on the stem or the branches is known as phyllotaxy. It is often the location of a bud. In botany, the petiole is the stalk that attaches the leaf blade to the stem, and is able to twist the leaf to face the sun. : In this type of phyllotaxy one pair of leaves are, : In this type there are three leaves attached at each, : In this type, more than three leaves are present in a whorl at, : A leaf is said to be simple in which the leaf blade or lamina is, : Here the lamina is divided in to a number of leaf like lobes, In a pinnately compound leaf, the leaflets are borne on a common axis called the rachis. Copyright © 2018-2021 BrainKart.com; All Rights Reserved. From this arise many veins perpendicularly and run parallel to each other eg. Gloxinia), African violet (Streptocarpus syn. Petiole, midrib. (i) Leaf base (Hypopodium) : Leaf base is the lower most part of the leaf meant for attachment. Although biomechanics of petiole and lamina have each been studied extensively [1–3, 6–11], the transition area from petiole to lamina, has not been the focus of studies so far. The leaves without stipules are called exstipulate. Decompound. In most of the plants it is indistinct. Lamina. Conversely, in many non-peltate leaves the supporting structures of the petiole merge rectilinearly into the midribs [11, 12]. Whorled : In this type, more than three leaves are present in a whorl at each node eg. When the number of leaflets is odd, it is said to beimparipinnate eg. Leaves lacking a petiole are called sessile or apetiolate. The green leaves of the plant are collectively called as foliage of the plant. Outgrowths appearing on each side of the petiole in some species are called stipules. The leaf base is also called as hypopodium. VIII. 3.Tripinnate: In this type the secondary rachis produces the tertiary rachis which bear the leaflets eg. PMID: 17345326 Leaves are the chief organs of photosynthesis. Pages 261-272. 4. Calotropis, 3.Ternate Phyllotaxy : In this type there are three leaves attached at each node eg. Leaves are the chief organs of photosynthesis. Petiole- Petiole is the stalk which attaches the leaf blade ( lamina) to the stem.The petiole is the transition between the stem and the leaf blade. Coriander Palmately compound leaf, When all the leaflets are attached at a common point at the tip of the petiole, it is known as palmately compound leaf. The petiole mechanically links the leaf to the plant and provides the route for transfer of water and sugars to and from the leaf. Lamina – The blade-shaped part of a leaf where transpirationand photosynthesis take place. Tripinnate 4. eg.Polyalthia. Banana. Nerium. Email This BlogThis! Trifoliate (eg. Suchswollen leaf bases are called pulvinate leaf bases as seen in mango leaves. Tamarind. It acts as a leaf cushion. 2.Opposite Phyllotaxy: In this type of arrangement two leaves are present at each node, lying opposite to each other. However, these contrasting growth responses are not caused … Bifoliate (eg.Zornia diphylla) 3. Petiole base and petiole–lamina junction were selected manually. Petiole 3. The description (partially pasted below) of Ramosmania rodriguesii in Verdcourt (1996) states that the leaves are up to 30 cm long. The four main types of phyllotaxy are. Most of the monocot leaves have parallel venation. It is of two types. In this type of venation there is a prominent vein called the midrib from which arise many small veins which finally form a net like structure in the lamina. Join now. The main function of the stipule is to protect the leaf in the bud. In grass they converge at the apex and hence it is called convergent. (BS) Developed by Therithal info, Chennai. Sub aerial modifications 3. Leaf blade: It is also known as lamina. Leaf base 2. Sometimes leaf base shows different variations as follows : (a) Pulvinate leaf base : In members of leguminosae the leaf is swollen. Fifty-seven compounds have been identified by mass spectrometry and retention indices. Leaves are the chief organs of. They are borne at the nodes of the stem. Citing Literature. 1. Pixels located below the petiole–lamina junction were labeled as petiole and above as lamina. These data suggest that the petiole of the mature winter leaf of A. italicum closely co‐operates with the lamina for enhancing light capture and utilization. The two types of compound leaf are: 1.