Calcium moves into the cells of plants via the xylem. This process is one-way. Calcium can not be mobilized from older tissues and redistributed via the phloem. This forces the developing tissues to rely on the immediate supply of Ca in the xylem, which is dependent on transpiration. Transpiration is low in young leaves, in enclosed tissues, and in fruit. (White et al.,2003) Without adequate available Calcium, plants can suffer from leaf edge burn or tip burn, leading to misdiagnosis of salt burn or toxic salt lockout.