Transport of mineral substances in a plant. Mobility of mineral ions

you are: Transport of mineral substances in a plant

After receipt in ksilemu a root the majority of ions is transported in elevated parts of a plant, but some get in floemu and are transferred together with other dissolved substances to consuming cages in growing root apekse and to zones of storage of nutrients. again absorbed ions freely move on a plant. However use of these ions in a cage can be connected with their inclusion in any structural molecule. Formed fabrics demand continuous supply by all basic mineral ions. Bleach all of them arrive from soil the plant does not test any difficulties. However when any mineral ion does not suffice, it sometimes can be received at disintegration generated before molecules in old cages. so, N, formed at splitting of amino acids, and Mg2 +, arising at chlorophyll disintegration, move from older parts of a plant in young growing cages. Such moving of mobile nutritious elements is carried out, possibly, on floeme. Removal of these elements from older cages accelerates ageing and causes occurrence of symptoms of mineral insufficiency in older parts of a plant.

Some mineral elements strongly communicate in a cage and, having arrived in ' it once, are not taken out therefrom. Symptoms of deficiency of such motionless elements are observed in the youngest fabrics. Са2 + and Ee24-) - two elements in which the lack is often felt, as causes development of appreciable symptoms of their deficiency in growing fabrics. For lack of Sa2 + the median plate of new cages cannot be formed. as normal permeability of a membrane also depends on corresponding maintenance with calcium, apeks ceases to grow and soon dies off. Iron is necessary for chlorophyll synthesis. It is also a component ferredoksina and tsitohromov. At a lack of iron of a plant often find out full etioljatsiju the youngest leaves. Irrespective of, scarce elements are mobile or motionless, normal intensive growth of a plant can be restored only after really full maintenance with its all necessary elements of a food.