Plant Nutrition

Practice flashcards created from the lecture notes on plant nutrition, covering key concepts such as photosynthesis, nutrient transport, essential nutrients, and plant growth.

What do plants mean by being autotrophic?

Plants make their own food.

What is the main light-absorbing pigment in chloroplasts?

Chlorophyll absorbs light energy for photosynthesis.

What is the overall equation for photosynthesis?

6 CO2 + 6 H2O + Light energy → C6H12O6 + 6 O2.

Where does the Calvin Cycle take place?

In the stroma of chloroplasts.

What is the purpose of light-dependent reactions?

Convert light energy into ATP and NADPH, producing O2.

What enzyme catalyzes the reaction between CO2 and RuBP in the Calvin Cycle?

RuBisCO.

How are sugars transported in plants?

Through the phloem in a process called translocation.

What are the three categories of essential nutrients for plants?

Macronutrients, micronutrients, and essential elements.

What are two forms of nitrogen that plants can absorb?

Nitrate (NO₃⁻) and ammonium (NH₄⁺).

What is the role of mycorrhizal fungi in phosphorus uptake?

They enhance phosphate uptake by extending hyphae into the soil.

What is the purpose of hydroponic culture in plant nutrition studies?

To determine which nutrient elements are essential.

What does the ratio on a fertilizer bag indicate?

The ratio of Nitrogen (N), Phosphorus (P), and Potassium (K).

What are some symptoms of nitrogen deficiency in plants?

Poor growth and wilting.

What is the role of decomposers in the nutrient cycle?

They break down organic matter releasing minerals and nutrients into the soil.

What is mixotrophy in plants?

The combination of autotrophy and heterotrophy for nutrient acquisition.