Whether Sulphur is a mobile or immobile element. In NCERT in Transport and mineral chapter it is written that sulpher is mobile but in Mineral nutrition chapter it is written that sulphur is immobile. Pls write the correct answer.
After seeing this image in mineral nutrition chapter see page 190 of transport and mineral nutrition chapter (section: translocation of mineral ions 2 para)

Whether Sulphur is a mobile or immobile element. In NCERT in Transport and mineral chapter it is written that sulpher is mobile but in Mineral nutrition chapter it is written that sulphur is immobile. Pls write the correct answer. After seeing this image in mineral nutrition chapter see page 190 of transport and mineral nutrition chapter (section: translocation of mineral ions 2 para) It is the condition hean rate "O Pre•Medical : Biology , ndnIL | 1.5.2 Translocation of Mineral Ions After the ions have reached xylem through active or passive uptake. combinat*.on 01 the two. their further transport up the stem to all the plant is the transpiration stream. Ihe chiefsinksfor the mineral elements are the grovving regions plant.such as•€he apical and lateial meristems, young leaves, flowers, fruits and seeds. and the storage organs. Unloading of ions occurs at the fine vein endings through diffusion and active by these cells. Mineral ions are frequently remobilised, particularly from senescing parts. Older dying leaves export much of their mineral , to younger leaves. Similarly. before leaf fall in dectdous mineral, are parts. Elements most readil mobilised phosphoru•ulphuey nitrogen and potassium. structur*rcomponents O Re calcium are pot remobilised. analysis of the xylem exudates shows that though some of en travels as inorganic ions, much of it is carried in the orgar& forrn as amino acids and related compounds. Similarly. small amounts of P ahd S are carried as organic compounds. In addition. small amount of exchange of materials does take place between xylem and phlcem Hence, it is not that we can clearly make a distinction and say categoricalb that xylem transports only inorganic nutrients while phloem transM)fis only organic materials. as was traditionally believed. 11.6 PHLOEM TRANSPORT: FLOW FROM SOURCE TO SINK Food, primarily sucrose, is transported by the vascular tissue phloem from a source to a sink. Usually the source is understood to be that part of the plant which synthesises the food. i.e.. the leaf. and sink. the part that needs or stores the food. But. the source and sink maybe reversed depending on the season, or the plant's needs. Sugar stored in roots may be mobilised to become a source of food in the early spring when the buds of trees, act as sink: they need ener4' for growth and development of the photosynthetic apparatus. Since the source-s relationship is variable, the direction of movement in the phloem be upwards or downwards, i.e., bi-directional. This contrasts wi that of the xylem where the movement is always unidirectional' upwards. Hence, unlike one-way now of water in transpiratiOn' in phloem sap can be transported in any required direction so as there is a-source of sugar and a sink able to use. store or the sugar. Phloem sap is mainly water and sucrose. but other sugars,

Dear Student,

Sulfur is immobile in plants.

Regards

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