Ch 23: Plant Nutrition and Transport (Exam 3) Flashcards
Difference between Macronutrients and Micronutrients
MACRO-out of the 16 elements essential to plants, 9 are macro, meaning they are needed in fairly large amounts
-carbon (c), oxygen (o2), hydrogen (h), nitrogen (n), potassium (k), calcium (ca), magnesium (mg), phosphorus (p), and sulfer (s)
MICRO-smaller nutritional categorize, 7 of the essential
-chlorine (cl), iron (fe), boron (b), zinc (zn), manganese (mn), copper (cu), molybdenum (mo)
Carbon enters the plant through which organ system?
LEAF and STEM
-diffuses into the leaf or stem through stomata spores
Why plants need nitrogen
-it is vital because it is a major component of chlorophyll, which is the compound by which plants use sunlight energy to provide sugars from water and carbon dioxide (photosynthesis)
Identify which plant macronutrients are represented on commercial fertilizer labels
NITROGEN, PHOSPHORUS, POTASSIUM
Role of Rhizobium bacteria in plant nutrition
-stimulate nodule formulation on the roots of the plants called legumes (clover, beans, peas, peanuts, soybeans, and alfalfa)
-a farming technique called crop rotation alternates legume crops with nitrogen hungry plants such as corn and cotton
-the legume replenishes the soils nitrogen, reducing fertilizer need
What happens to the majority of water a plant takes up during the growing season?
-moves through the plants vascular tissue and evaporates from leaves
-they lose water from TRANSPIRATION
What environmental conditions increase or decrease the rate of transpiration?
High Transpiration=Warm temp/windy/bright
Low Transpiration=High humidity
How do non carnivorous plants get nutrients like nitrogen and phosphorus?
-through their animal prey, through their leaves specifically modified as traps
Identify the physiological cost of being a carnivorous plant
-reduced photosynthetic efficiency
-a plant that invests energy in insect traps, therefore has a reduced leaf area available for photosynthesis
