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Root morphology is divided into four zones: the root cap, the apical meristem, the elongation zone, and the hair.[3]The root cap of new roots helps the root penetrate the soil. These root caps are sloughed off as the root goes deeper creating a slimy surface that provides lubricant. The apical meristem behind the root cap produces new root cells that elongated. Then, root hairs form that absorb water and mineral nutrients from the soil.[4] The first root in seed producing plants is the radicle, which expands from the plant embryo after seed germination.

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PLANT ROOTS

2021/03/23

Perhaps the most striking characteristic of roots that distinguishes them from other plant organs such as stem-branches and leaves is that roots have an endogenous[5] origin, i.e., they originate and develop from an inner layer of the mother axis, such as pericycle.[6] In contrast, stem-branches and leaves are exogenous, i.e., they start to develop from the cortex, an outer layer. In response to the concentration of nutrients, roots also synthesise cytokinin, which acts as a signal as to how fast the shoots can grow. Roots often function in storage of food and nutrients. The roots of most vascular plant species enter into symbiosis with certain fungi to form mycorrhizae, and a large range of other organisms including bacteria also closely associate with roots.[7] --- This episode is sponsored by · Anchor: The easiest way to make a podcast. https://anchor.fm/app