Meristems and Secondary Growth 5. There are bands of phloem fibers in the secondary phloem and clusters of fibers further out into the cortex. Periderm, which includes, Cork. However, the cortex can be defined as a primary ground tissue between the epidermis and vascular bundles in a stem [12]. In this sense it includes periderm, cortex, primary and secondary phloem. The latter designates all tissues outside the vascular cambium. Related Questions: Male gemetes are flagellated in : Pollen tablets are avalable in the market for: Secondary phloem can remain active over several growth cycles. Alstonia) are present. Secondary phloem. Thus, ‘secondary cortex’ [13] and ‘pseudo-cortex’ [14] have also been used for this zone. 2. For extrastelar secondary growth the cork cambium or … Be the first to write the explanation for this question by commenting below. (c): Extra stelar secondary growth means growth in the cortical region, external to slele. The term periderm is more distinct than bark. (1). Bark —includes the periderm, patches of Contributors and Attributions; In roots, the formation of both secondary meristems involves the pericycle. Lenticels are openings in the bark of a tree that allows gaseous exchange. Beyond the cortex, the first periderm layer has formed. Correct Answer: all of these. The periderm includes . During the secondary growth in both stem and root, the peripheral tissues like epidermis, hypodermis and cortex are replaced by a new secondary tissue called the Periderm (bark). secondary xylem.d. cork.. Secondary phloem, like secondary xylem, is a complex tissue. periderm.c. Periderm —cork cambia, cork 7. Answer and Explanation: 33. It can be distinguished into outer non-living and inner living parts. Explanation: No explanation available. Answer to Heartwood and sapwood consist ofa. In mature barks a large quantity of sclerenchyma, phloem fibres and sclereids (e.g. bark.b. and shrubs, the zone between the periderm and the secondary phloem is often referred to as ‘cortex’. Most of the phloem parenchyma cells are filled with starch grains. secondary phloem.e. Options (a) cork (b) secondary phloem (c) cambium (d) all of these. The functional phloem … Cells displaced towards the outside of the vascular cambium differentiate as phloem. Cork Cambium. Secondary Phloem has the same origin as secondary xylem, namely, the vascular cambium. Vascular Cambium produces new xylem cells to the inside and new phloem cells to the outside 6. In secondary state, it consists of secondary phloem and all tissues outside it. This is a closer view of the cambium and phloem from cottonwood. Phelloderm. Cork cambium or phellogen originates in the living epidermal parenchyma or hypodermal collenchyma cells of stems. 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