Leaf-Nutrient Deficiency Symptoms Flashcards
Plants take in carbon in the form of __________ ______ ______, obtain hydrogen and oxygen from water, and take up the remaining elements from the soil.
atmospheric carbon dioxide
By growing plants in an _______ ________ ________ (hydroponics) and omitting an essential nutrient, specific deficiency symptoms can be observed.
aqueous nutrient solution
This deficiency results in yellowing (chlorosis) of older leaves.
Nitrogen
Plants deficient in this element exhibit dark green older leaves and stunted growth. Red an- thocyanin pigments sometimes accumulate.
Phosphorus
Deficiency symptoms are exhibited in older leaves that yellow and have dead (necrotic) tissue in spots, and roots are easily infected with pathogenic or- ganisms.
Potassium
A lack of this results in a yellow- ing of the leaves between the veins with the tips and margins turning upward.
Magnesium
affects the younger leaves first with the veins becoming light green and a yellowing of the tissue between them
Sulfur
Lack of this affects meristematic regions, resulting in the death of terminal buds and root tips.
Calcium
results in a chlorosis of young leaves with the yellowing occurring between veins
Iron
Without it, leaves wilt, turn yellow, show dead spots, and then become a bronze color. Roots become stunted and club-shaped near the tips.
Chlorin
with- out it , younger leaves form yellow speckles between the veins.
Manganese
Lack of it produces death of shoot and root apical meristems, beginning with young leaves becoming light green at the base, and root tips becoming swollen.
Boron
A deficiency of this results in formation of small leaves and shortened stem internodes. The leaf mar- gins may become distorted.
Zinc
lack of this produces dark green, twisted young leaves, which often have dead spots.
Copper
Lack of this element produces chlorosis of old and midstem leaves, and eventually affects the
young leaves.
Molybdenum
