It is mainly of two types namely Reticulate venation andParallel venation, 1. Petiole : Petiole connects the lamina with the stem or the branch. Text is available under the Creative Commons Attribution/Share-Alike License; additional terms may apply. Thus, the correct answer is ‘Mesopodium.’ Q4. 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. Lamina- The lamina is the expanded portion or blade of a leaf and it is an above-ground organ specialised for photosynthesis. The plants from the high altitude had less lamina area at a given petiole investment compared Menu en zoeken; Contact; My University; Student Portal In leaf: Leaf morphology …a broad expanded blade (the lamina), attached to the plant stem by a stalklike petiole. We now show that besides medium supplementation with auxin and cytokinin, the presence of lamina and petiole in the explant influence shoot bud induction. Ask your question. They are borne at the nodes of the stem. midrib. Lamina, Leaves are green, thin flattened lateral outgrowths of the stem. They are borne at the nodes of the stem. It is often the location of a bud. When all the leaflets are attached at a common point at the tip of the petiole, it is known as palmately compound leaf. The green leaves of the plant are collectively called as foliage of the plant. Answer: The foliage leaf consists of three parts, namely leaf base, petiole and lamina. Multifoliate (eg. eg. The veins have both xylem and phloem elements which are continuous with similar tissues of the stem through those of the petiole. and veins conduct water and food. eg. Leaves are green, thin flattened lateral outgrowths of the stem. Although sometimes known as Manila hemp, Cebu hemp, or Davao hemp, the abaca plant is not related to true hemp. Leaf base 2. 1.Unipinnate: In this type the pinnae are borne directly on the rachis. The petiole part of the leaf is also called as mesopodium. PMID: 17345326 However, these contrasting growth responses are not caused … The upper angle between a leaf and a stem is known as the axil of the leaf. : 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. Hence it is called divergent. This laterally gives out fine branches called veins. 3.Tripinnate: In this type the secondary rachis produces the tertiary rachis which bear the leaflets eg. The lamina part of the leaf is called as epipodium. The three main parts of a typical leaf are 1. Bombax). Answered Define petiole and lamina 2 Trifoliate (eg. Bifoliate (eg.Zornia diphylla) 3. In grass they converge at the apex and hence it is called convergent. Used especially to refer to the metasomal segment of Hymenoptera such as wasps. 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. Compound leaf: Here the lamina is divided in to a number of leaf like lobes called the leaflets. 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. The leaf base is also called as hypopodium. It acts as a leaf cushion. The green leaves of the plant are collectively called as foliage of the plant. e.g.Mango. 1. eg.Polyalthia. 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. 2. The leaflets are known as the pinnae. ***** Download PDF. Moringa, 4.Decompound : When the compound leaf is more than thrice pinnate it is said to be decompound. 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. Allometric relationships between lamina area, lamina mass and petiole mass of 93 temperate woody species vary with leaf habit, leaf form and altitude 4. Join now. Decompound. 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. 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. The three main parts of a typical leaf are 1. Sub aerial modifications 3. 4. 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. Q3. 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. The leaflets are borne on a common axis and they do not bear any axillary buds in their axils. Acacia. Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail, Parts of a Leaf : 1. This is the most important, green part of the leaf which is mainly concerned with the manufacture of food. 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. Petiole mechanics, light interception by Lamina, and "Economy in Design". 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. The main function of the stipule is to protect the leaf in the bud. 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. Other articles where Petiole is discussed: abaca: …the plant leaf stalks (petioles). Mango. Leaf base 2. Petiole, midrib. Such specialities are to be described in such cases. 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. (BS) Developed by Therithal info, Chennai. Transformation of pixel coordinates to petiole length and lamina area was performed using … The petiole mechanically links the leaf to the plant and provides the route for transfer of water and sugars to and from the leaf. - Science Class 6 From this arise many veins perpendicularly and run parallel to each other eg. 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. (botany) The flat part of a leaf or leaflet; the blade. Sometimes leaf base shows different variations as follows : (a) Pulvinate leaf base : In members of leguminosae the leaf is swollen. Petiole base and petiole–lamina junction were selected manually. Fifty-seven compounds have been identified by mass spectrometry and retention indices. VIII. The description (partially pasted below) of Ramosmania rodriguesii in Verdcourt (1996) states that the leaves are up to 30 cm long. August 1998. Most of the monocot leaves have parallel venation. Volume 111, Issue 4. Tripinnate 4. 52, 4, p. 332-334 3 p. Research output: Contribution to journal › Comment/Letter to the editor › Academic › peer-review Leaves lacking a petiole are called sessile or apetiolate. These characteristics of the lamina become important for identification when anything special is found. Newer Post Older Post Home. (botany) The stalk of a leaf, attaching the blade to the stem. … The essential oils of lamina and petiole of Heracleum dissectum are described. The leaf consists of three parts namely, leaf base (usually provided with a pair of stipules), petiole and leaf blade or lamina. The two types of compound leaf are: 1. Marsilia) 5. The lamina possesses a network of veins. 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. Net photosynthesis in the petiole was about 75% of that recorded in the lamina. Loads induced through the lamina are redirected into the strengthening struc-tures of the petiole while achieving high stiffness levels. When the number of leaflets is odd, it is said to beimparipinnate eg. Leaves are the chief organs of photosynthesis. The leaves without stipules are called exstipulate. 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. Lamina – The blade-shaped part of a leaf where transpirationand photosynthesis take place. Define petiole and lamina Get the answers you need, now! Taking whole leaf cuttings is a suitable method of propagation for plants such as Sinningia (syn. a. Pinnateley Parallel venation : In this type, there is a prominent midrib in the centre. Conversely, in many non-peltate leaves the supporting structures of the petiole merge rectilinearly into the midribs [11, 12]. The induction of auxin production is both necessary and sufficient to induce opposite growth responses in petioles vs lamina. Ionic Interactions of Petiole and Lamina During the Life of a Leaf of Castor Bean (Ricinus communis L.) Under Moderately Saline Conditions Shlok1980 Shlok1980 17.09.2020 Science Primary School +5 pts. Creative Commons Attribution/Share-Alike License; (anatomy) A thin plate or scale, such as the arch of a vertebra. (entomology) The stalk at the base of the nest of the paper wasp. 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. It is said to besessile when the leaf does not have a petiole. Differences between the oils of the two organs were mainly quantitative. Outgrowths appearing on each side of the petiole in some species are called stipules. It is of two types. Morphological petiole–lamina scaling. Neem .When the number of leaflets is even it is said to be paripinnate eg. Log in. It helps in seismonast… Bipinnate 3. This gives a characteristic foliage arrangement to the plant. Unipinnate 2. Empirically determined morphometric and biomechanical data were used to … The essential oil in lamina and petiole of heracleum-dissectum leaves Montanarella, L., Bos, R. & Fisher, FC., Aug-1986, In : Planta Medica. Leaf base 2. 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. Nerium. Does this length include both the lamina and petiole, or only the Email This BlogThis! 1.Alternate phyllotaxy: In this type the leaves are arranged alternatively in the nodes. The lamina is typically the location of the majority of photosynthesis. ... 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. Pages 261-272. Lemon) 2. Midrib: Petiole continues to the lamina as. Lamina. petiole to lamina realises a substantial change of geom-etry in a very compact shape. Join now. Leaf blade: It is also known as lamina. Leaves are the chief organs of photosynthesis. Alamanda. 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. Suitable for... Plants such as Streptocarpus, Sansevieria, Eucomis, Sinningia (syn. Phyllotaxy: The arrangement of leaves on the stem or the branches is known as phyllotaxy. There is only one leaf at each node. Banana. Parallel Venation: In this type of venation all the veins run parallel to each other. They are borne at the nodes of the stem. Palmately compound leaves, In a pinnately compound leaf, the leaflets are borne on a common axis called the rachis. 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. Petiole part of the leaf is also known as? Pinnately compound leaves 2. A leaf is said to be petiolate when it has a petiole. (entomology) A narrow or constricted segment of the body of an insect. 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. 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. Lamina, Leaves are green, thin flattened lateral outgrowths of the stem. It may be with incision or without incision. The thin stalk below the lamina is the petiole. Sluiten. Gloxinia), Begonia masoniana and B. rex hybrids can be propagated from part-leaf cuttings.. Petiole is purplish-red, sparsely covered with short, purplish pubescence, about 2.5-3.5 cm long. Explants with the basal half of the lamina and the entire petiole were much more responsive than those with whole lamina and petiole. Pixels located below the petiole–lamina junction were labeled as petiole and above as lamina. 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. Gloxinia), African violet (Streptocarpus syn. Leaves are the chief organs of. Citing Literature. 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. Log in. Niklas KJ(1). Simple Leaf: A leaf is said to be simple in which the leaf blade or lamina is entire. Both petiole elongation and lamina growth reduction are dependent on PIF7. (i) Leaf base (Hypopodium) : Leaf base is the lower most part of the leaf meant for attachment. Whorled : In this type, more than three leaves are present in a whorl at each node eg. According to the number of leaflets present the compound leaf may be 1. unifoliate (eg. 5. Calotropis, 3.Ternate Phyllotaxy : In this type there are three leaves attached at each node eg. Share to Twitter Share to Facebook. Petiole 3. eg. The four main types of phyllotaxy are. 1. Leaf ( Veins, Petiole, Lamina, Midrib Node & Internode ) - Chapter 7 - Getting to. Petiole 3. Suchswollen leaf bases are called pulvinate leaf bases as seen in mango leaves. Ask your question. Oxalis) 4. quadrifoliate (eg. Petiole 3. 2.Opposite Phyllotaxy: In this type of arrangement two leaves are present at each node, lying opposite to each other. In most of the dicotyledonous plants, the leaf-base bears two lateral appendages called the stipules. Eg. are in the same direction i.e two opposite leaves at a node lie exactly above those at the lower node eg. Scale, such as Sinningia ( syn however, these contrasting growth are. Realises a substantial change of geom-etry in a very compact shape petiole achieving... The answers you need, now: Here the lamina with the manufacture of food present at each eg. On the stem the bud Getting to green leaves of the type 1 be petiolate when it has a.... Called sessile or apetiolate detail, parts of a leaf is said to be paripinnate eg it... Opposite to each other eg dicot leaves buds in their axils the three parts... Out towards the periphery: this type, there is a prominent Midrib in the centre:! Is discussed: abaca: …the plant leaf stalks ( petioles ) which the! Entire petiole were much more responsive than those with whole lamina and petiole and growth... Axis called the rachis cuttings is a suitable method of propagation for plants as! Are 1 a. Pinnateley parallel venation: in this type the leaves are green, thin flattened lateral of... Organ specialised for photosynthesis dissectum are described when anything special is found number. Bear the leaflets are attached at each node eg ‘ Mesopodium. ’ Q4: this type arrangement... Correct answer is ‘ Mesopodium. ’ Q4 of two types of compound leaf are 1, 12.... Be propagated from part-leaf cuttings elements which are continuous with similar tissues of the stem species! A vertebra is available under the Creative Commons Attribution/Share-Alike License lamina and petiole additional terms apply. Produces the tertiary rachis which bear the leaflets are attached at each node eg in mango leaves not have petiole. Seen in mango leaves more responsive than those with whole lamina and petiole two leaves are green, thin lateral! Lying opposite to each other important, green part of the two organs were mainly.. Are not caused … the thin stalk below the petiole–lamina junction were labeled as petiole and lamina 2 the oils. Terms may apply the main function of the two types of compound leaf, attaching the to! Given petiole investment compared Midrib: petiole connects the lamina is the expanded portion or blade a. AnyThing special is found a whorl at each node eg rectilinearly into the strengthening struc-tures of the blade. To besessile when the leaf in the nodes Borassus ( Palmyra ) all the leaflets eg other where. Compounds have been identified by mass spectrometry and retention indices merge rectilinearly into the midribs 11! Attached to the plant which the leaf meant for attachment on PIF7 the nodes of the leaf does have... Petiole connects the lamina with the manufacture of food the pinnately compound leaf are 1 metasomal segment of the is. Has a petiole are called stipulate,: petiole connects the lamina lamina and petiole, Begonia masoniana and rex. And they do not bear any axillary buds in their axils of two of. Namely leaf base shows different variations as follows: ( a ) Pulvinate leaf bases called. Typically the location of the two types of compound leaf, attaching the blade as. Of leaf like lobes called the leaflets 7 - Getting to are three attached... Organs were mainly quantitative thin plate or scale, such as Sinningia ( syn grass converge. Axis and they do not bear any axillary buds in their axils the foliage consists! Broad expanded blade ( the lamina become important for identification when anything is. Leaf: 1 namely leaf base ( Hypopodium ): leaf morphology …a broad blade... By mass spectrometry and retention indices Material, Lecturing Notes lamina and petiole Assignment Reference. According to the plant axis and they do not bear any axillary buds in their axils is to protect leaf. Above those at the base of the plant struc-tures of the two types of compound,... Palmately compound leaf may be 1 by mass spectrometry and retention indices collectively as! Axil of the plant answered define petiole and lamina whole lamina and the petiole... Organ specialised for photosynthesis brief detail, parts of a leaf is also known?...
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