Plant Nutrition

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Questions and Answers

Which of the following is a function of the aleurone layer in plant nutrition?

Production of auxins
Regulation of ion uptake
Hydrolysis of stored lipids (correct)
Synthesis of chlorophyll

What is the primary function of plasmodesmata in plant nutrition?

To regulate the concentration of ions in the apoplast
To allow for the passage of nutrients from the xylem to the phloem
To facilitate the exchange of molecules between adjacent cells (correct)
To secrete proteins into the apoplast

Which of the following is a characteristic of the Casparian strip in plant nutrition?

It is a layer of suberin that prevents the backflow of ions from the xylem to the cortex (correct)
It is a type of plasmodesmata that connects the xylem and phloem
It is a type of cell wall modification that increases water permeability
It is a region of high auxin concentration that promotes cell elongation

What is the function of the chelating agent nicotianamine in plant nutrition?

<p>To increase the bioavailability of Fe and other micronutrients (C)</p> Signup and view all the answers

Which of the following is a characteristic of the symptoms of potassium deficiency in plants?

<p>Necrosis of older leaves and decreased root growth (B)</p> Signup and view all the answers

Study Notes

Aleurone Layer

Regulates seed germination by producing enzymes that break down stored nutrients

Plasmodesmata

Enables direct cell-to-cell communication and transport of ions, sugars, and other molecules in plants

Casparian Strip

A specialized band of impermeable cells in root endodermis that prevents apoplastic flow of water and ions into the xylem

Nicotianamine

A chelating agent that helps solubilize metal ions, making them available for plant uptake and transport

Potassium Deficiency

Characterized by scorched or brown leaf edges, reduced plant growth, and increased susceptibility to disease and water stress

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Description

Explore the various aspects of plant nutrition, including the functions of aleurone layer, plasmodesmata, Casparian strip, and chelating agents. Learn about the symptoms of potassium deficiency in plants.