Image © 2005 Dr. Horst Kretzschmar
Passiflora or Passion flower mineral nutrients.
||Micronutrient. Important for phloem transport and cell elongation. Aids production of sugars. Essential for fruit & seed development.||Growing tips become deformed or die, also leaf discolouration.||Leaf tips yellow & die. Leaves look scorched & fall.|
||Secondary macronutrient. Many functions including structural integrity of cells & growing tips.||Reduced growth, deformation or death of growing tips. Poor fruit development.||May cause deficiency in either magnesium or potassium.|
|Carbon||From CO2 in air, essential to build sugars.||N/A||N/A|
||Micronutrient. Important in fluid balance & in breaking down water for photosynthesis.||Club roots. Wilted leaves becoming bronze, chlorotic then dying.||Salt injury causing leaf burn.|
||Micronutrient. Transition metal. Important in electron transport & reproductive growth. Aids in root metabolism and helps in the utilization of proteins.||Similar to Iron deficiency if soil acidic.||May cause distortion of new growth. Can occur in peat potting composts.|
|Hydrogen||From H2O, essential to build sugars.||N/A||N/A|
|Iron||Micronutrient. Transition metal. Important for enzyme synthesis & function. Electron transfer processes and chlorophyll synthesis.||Chlorosis. Yellow/white interveinal areas on young upper leaves leading to areas of leaf death.||May cause leaf bronzing with tiny brown spots.|
||Secondary macronutrient. This is an essential part of the chlorophyll molecule. Vital in photosynthesis and respiration.||Chlorosis, leaves appearing pale green or yellow. Yellowing between leaf veins spreading to younger leaves. poor fruit development and low yield.||Excess rare as well tolerated. Too much will suppress Calcium & Potassium & reduce growth.|
||Micronutrient. Essential in photosynthesis & respiration including enzyme systems breakdown of carbohydrates.||Interveinal Chlorosis, yellowing or mottled young upper leaves. followed by brown spots giving a chequered red effect.||Reduced
growth. Older leaves with brown spots surrounded by a chlorotic
Looks like Iron deficiency. Can occur in acid soils.
||Micronutrient. Essential component of enzymes for nitrogen fixing.||Interveinal Chlorosis on older leaves which may distort.||N/A|
||Micronutrient. Found in seeds and fruit. Needed to help form urease to break down urea nitrogen for plant use. Involved in the iron uptake from the soil.||
Decreased iron utilization.
|Chlorosis and necrotic leaf margins.|
|Nitrogen||Primary macronutrient. Needed for photosynthesis, growth & respiration. It is a constituent of DNA, RNA & amino acids which are used to build protein molecules. Nitrogen is inert & has to be incorporated into the plant by nitrogen-fixing bacteria in their root nodes.||Pale & lower leaves yellow or dying. Light green to yellow appearance of leaves, especially older leaves; stunted growth poor fruit development.||Dark green over vigorous foliage which is susceptible to disease & insect attack & will not overwinter well. Poor fruit & seeds.|
|Oxygen||O2, H2O. Essential for photosynthesis of sugar molecules.||N/A||N/A|
||Primary macronutrient. Essential for reproduction & photosynthesis & involved in energy transfer & formation of oils, sugars & starches. Helps maturation, blooming & root growth.||Slow development, poor growth, flowering and fruiting. Leaves may appear purple.||May cause micronutrient deficiencies, especially iron or zinc.|
||Primary Macronutrient. Activates many enzymes, encourages flowering & important in osmosis (fluid balance). Second to nitrogen in absorption for most plants. Builds disease resistance, improves fruit quality.||Older leaves yellowing around edges & then dying. Poor growth & vulnerable to disease. In Passiflora few or no flowers & poor fruiting & poor heat tolerance.||May cause deficiencies of calcium & magnesium.|
||Secondary macronutrient. Constituent of some amino acids. Enzyme cofactor and constituent. Improves root growth & seed production. Electron transfer processes and chlorophyll synthesis. Cold resistance.||Yellowing of young upper leaves spreading to whole plant. Occurs on new growth initially.||May cause early leaf drop.|
|Micronutrient. Enzyme cofactor, growth hormone synthesis. Transformation of carbohydrates & sugar consumption.||Interveinal chlorosis/yellowing on young leaves, reduced leaf size. Rosetting.||May cause iron deficiency.|