BIOL120 Lecture 7: Biol 120 Lecture 7 Plant Structure (1)
7 Jul 2016
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Document Summary
Main function to anchor the plant and to absorb and conduct water and minerals. Roots must transport water and minerals to stems and leaves, while also receiving organic molecules that come from the stems and leaves. Also produce hormones and other substances that regulate plant development and structure. Taproots system large main root that taps deep sources of water, which develops directly form the radicle (embryonic root) and produces branching lateral roots. Lateral roots develop their own branch roots to have an extensive root system. Penetrate deeply and are well suited for plants that have indefinite growth (larger each year) Large trees such as conifers can have shallow taproots due to shallow soil, lying on tio of rocks. Taproot system if they have to survive long periods without rainfall. Fibrous root system in most svp and monocots. Adventituous roots numerous roots arise from the lower pat of the stem: do not arise from other roots.
