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Abnormal secondary growth occurs in
Abnormal secondary growth occurs in
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The correct option is D Dracaena
Dracaena is the only monocot, which has been shown to also have secondary growth in roots. Palm trees are monocots that grow quite tall and thick, yet they lack "normal" secondary growth. Dracaena is a monocot but not a true palm, as palms lack the peripheral secondary thickening meristem, such as is found in Dracaena and Cordyline. This meristem produces both new vascular bundles and ground tissue (parenchyma). Dracaena is an unusual plant, in that the vascular bundles are surrounded by very prominent fibre bunidles. In this sense, Dracaena is not anomalous. The stems undergo a specialized secondary growth, which manifests itself in the production of additional parenchymatous elements. Their later growth pattern is termed diffuse secondary growth and consists mostly of a proliferation of ground parenchyma cells and additional vascular bundles near the periphery.
Dracaena is the only monocot, which has been shown to also have secondary growth in roots.
Palm trees are monocots that grow quite tall and thick, yet they lack "normal" secondary growth. Dracaena is a monocot but not a true palm, as palms lack the peripheral secondary thickening meristem, such as is found in Dracaena and Cordyline. This meristem produces both new vascular bundles and ground tissue (parenchyma).
Dracaena is an unusual plant, in that the vascular bundles are surrounded by very prominent fibre bunidles. In this sense, Dracaena is not anomalous. The stems undergo a specialized secondary growth, which manifests itself in the production of additional parenchymatous elements. Their later growth pattern is termed diffuse secondary growth and consists mostly of a proliferation of ground parenchyma cells and additional vascular bundles near the periphery.
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