BISC 101 Chapter Notes - Chapter 38: Endodermis, Antiporter, Potential Gradient
26 Oct 2017
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N - deficiency shown by yellowing leaves. P- deficiency shown through stunted growth & dead spots. Can be fixed by adding fertilizer with appropriate nutrients: explain why carnivorous & parasitic plants are most common in nutrient poor habitats. Soil nutrients = low then the plant needs to obtain this nutrients from another source. Slows h2o passage through soil & away from roots & leaching of anions from soil. Clay provides negative charges that retain cations = available to plants. Sand = loose soil for roots to penetrate: why is it important for plants to exclude certain ions? summarize the difference between active & passive exclusion mechanisms. Larger amounts of macronutrients are needed compared to micronutrients. H2o moves passive along water potential gradient. Sm. proteins bind toxins & prevent them from acting as poisons. Removes toxins from cytoplasm & store vacuoles. Negative charged particles bind positively charged ions. H+ ions (from roots) displace mineral cations.
