Hello, a deficiency in iron, manganese, magnesium, or molybdenum can cause interveinal chlorosis in plants. Interveinal chlorosis is a condition where leaves turn yellow between the veins while the veins remain green.
Iron deficiency: A common cause of chlorosis, iron is needed for chlorophyll production and photosynthesis. In high pH soils, iron is less available to plants. When experiencing iron interveinal chlorosis, the yellowing between leaf veins (chlorosis) will first appear on new growth as iron is considered an immobile nutrient within the plant, symptoms will show up on the newest leaves first.
Manganese deficiency: Chloroplasts, the organelles where photosynthesis occurs, are especially sensitive to manganese deficiency. When a plant exhibits manganese interveinal chlorosis, the symptoms will first appear on new growth (younger leaves)
Magnesium deficiency: Magnesium is a key component of chlorophyll. Magnesium is a mobile element, so older leaves are the first to display signs of deficiency.
Molybdenum deficiency: Molybdenum is an essential element in many enzyme activities.When a plant exhibits manganese interveinal chlorosis, the symptoms will first appear on new growth (younger leaves).
Good luck with the plants.