Lamina, Leaves are green, thin flattened lateral outgrowths of the stem. This gives a characteristic foliage arrangement to the plant. Ionic Interactions of Petiole and Lamina During the Life of a Leaf of Castor Bean (Ricinus communis L.) Under Moderately Saline Conditions 2.Opposite Phyllotaxy: In this type of arrangement two leaves are present at each node, lying opposite to each other. We now show that besides medium supplementation with auxin and cytokinin, the presence of lamina and petiole in the explant influence shoot bud induction. Leaf blade: It is also known as lamina. According to the number of leaflets present the compound leaf may be 1. 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. 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. The petiole mechanically links the leaf to the plant and provides the route for transfer of water and sugars to and from the leaf. Neem .When the number of leaflets is even it is said to be paripinnate eg. 1.Unipinnate: In this type the pinnae are borne directly on the rachis. The lamina part of the leaf is called as epipodium. 4. Alamanda. The pinnately compound leaf may be of the type 1. Thus, the correct answer is ‘Mesopodium.’ Q4. Although sometimes known as Manila hemp, Cebu hemp, or Davao hemp, the abaca plant is not related to true hemp. It helps in seismonast… 1.Alternate phyllotaxy: In this type the leaves are arranged alternatively in the nodes. Both petiole elongation and lamina growth reduction are dependent on PIF7. The essential oil in lamina and petiole of heracleum-dissectum leaves Montanarella, L., Bos, R. & Fisher, FC., Aug-1986, In : Planta Medica. 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. Conversely, in many non-peltate leaves the supporting structures of the petiole merge rectilinearly into the midribs [11, 12]. 52, 4, p. 332-334 3 p. Research output: Contribution to journal › Comment/Letter to the editor › Academic › peer-review The leaf base is also called as hypopodium. Gloxinia), African violet (Streptocarpus syn. Leaves which have the stipules are called stipulate, : Petiole connects the lamina with the stem or the branch. (botany) The flat part of a leaf or leaflet; the blade. The induction of auxin production is both necessary and sufficient to induce opposite growth responses in petioles vs lamina. Bifoliate (eg.Zornia diphylla) 3. Email This BlogThis! are in the same direction i.e two opposite leaves at a node lie exactly above those at the lower node eg. The four main types of phyllotaxy are. Join now. 1. Volume 111, Issue 4. : 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. Text is available under the Creative Commons Attribution/Share-Alike License; additional terms may apply. This is the most important, green part of the leaf which is mainly concerned with the manufacture of food. 4. Fifty-seven compounds have been identified by mass spectrometry and retention indices. Leaf base 2. According to the number of leaflets present the compound leaf may be 1. unifoliate (eg. Used especially to refer to the metasomal segment of Hymenoptera such as wasps. It is of two types. Acacia. 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. Eg. 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. ***** Download PDF. The thin stalk below the lamina is the petiole. 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. Morphological petiole–lamina scaling. The leaflets are known as the pinnae. It is often the location of a bud. ... 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. (i) Leaf base (Hypopodium) : Leaf base is the lower most part of the leaf meant for attachment. a. Pinnateley Parallel venation : In this type, there is a prominent midrib in the centre. Oxalis) 4. quadrifoliate (eg. When all the leaflets are attached at a common point at the tip of the petiole, it is known as palmately compound leaf. The upper angle between a leaf and a stem is known as the axil of the leaf. The leaves without stipules are called exstipulate. VIII. The petiole part of the leaf is also called as mesopodium. Log in. Leaves lacking a petiole are called sessile or apetiolate. Parallel Venation: In this type of venation all the veins run parallel to each other. Answered Define petiole and lamina 2 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. Hence it is mainly of two types of compound leaf may be 1 is discussed: abaca: …the leaf... Veins have both xylem and phloem elements which are continuous with similar tissues the... The abaca plant is not related to true hemp leaves which have the stipules leaf or... Part-Leaf cuttings of photosynthesis, Reference, Wiki description explanation, brief detail, parts of a leaf leaflet! Lamina Get the answers you need, now, Midrib node & Internode ) Chapter... - top 100 university a suitable method of propagation for plants such as Sinningia (.! 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